SCD3492 Rev C
DESCRIPTION
The Aeroflex Plainview ACT3492 Series is a monolithic implementation of the MIL-STD-1553B Bus Controller,
Remote Terminal and Passive Monitor functions including Dual Low Power Bus Tranceivers. All protocol
functions of MIL-STD-1553B are incorporated and a number of options are included to improve flexibility. These
features include programming of the status word, illegalizing specific commands and an independent loop back
self-test which is initiated by the subsystem. This unit is directly compatible with all microprocessor interfaces such
as the Aeroflex CT1611 and CT1800 products.
FEATURES
❑
Fully integrated MIL-STD-1553 RT / BC / MT Terminal
❑
One (1) sq-in low profile 100-pin PGA hermetic package
❑
+5V DC Operation
❑
250mW typical standby power consumption
❑
Automated self-test functions
❑
Allows setting of the message error bit on illegal commands
❑
Provides programmable control over terminal flag and subsystem flag status bits
❑
Full military (-55°C to +125°C) temperature range
❑
Designed for commercial, industrial and aerospace applications
❑
MIL-PRF-38534 compliant
❑
DESC SMD# Pending
ACT3492 Series
MIL-STD-1553B Remote Terminal, BUS Controller,
www.aeroflex.com/Avionics
July 10, 2007
Figure 1 – BLOCK DIAGRAM (WITH TRANSFORMERS)
& Dual Low Power Monolithic BUS Tranceivers
or Passive Monitor Hybrid with Status Word Control
Encoder
Decoder
"O"
Decoder
"1"
Driver
Select
&
Enable
BUS "0"
BUS "1"
T/R
Hybrid
T/R
Hybrid Internal
Highway
Control
Interface
Unit
Program
Sub Address
&
Word Count
Outputs
Discrete
Outputs
Control
Inputs
Terminal
Address
Inputs ACT3492
Inputs
Status
Word
Control
ASIC
ASIC
ASIC
+5V
Clk
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
ABSOLUTE MAXIMUM RATINGS (DIGITAL SECTION)
Parameter Min Max Units
VCC (Logic) -0.3 7.0 V
Input or Output Voltage at any Pin -0.3 VCC + 0.3V V
Storage Case Temperature -65 +150 °C
Load Temperature (Soldering 10 Sec) - +300 °C
DIGITAL PROTOCOL LOGIC CHARACTERISTICS (OVER FULL TEMPERATURE RANGE)
Parameter Test Conditions Min Typ Max Unit Notes
VCC (Logic) 4.5 5.0 5.5 V
VIH VCC (Logic) = 5.0V 2.2 - V
VIL VCC (Logic) = 5.0V - - 0.7 V
VOH High Level Output Voltage VCC (Logic) = 4.5V 2.4 - - V 1
VOL Low Level Output Voltage VCC (Logic) = 4.5V - - 0.4 V 1
IIH High Level Input Current VCC (Logic) = 5.5V,
VIN = 2.7V
-200
-25
-50
-10
-
-
-
-
-700
-400
-800
-50
µA
µA
µA
µA
2
2A
2B
2C
IIL Low Level Input Current VCC (Logic) = 5.5V,
VIN = 0.4V
-400
-25
-50
-25
-
-
-
-
-900
-400
-800
-75
µA
µA
µA
µA
2
2A
2B
2C
ICC (Logic) VCC (Logic) = 5.5V - - 20 mA 3
Clock Input (6MCK)
Nominal Value
Long Term Tolerance
Short Term tolerance, 1 second
Duty Cycle
-
-0.1
-0.01
45
6
-
-
+0.1
+0.01
55
MHz
%
%
%
Notes:
1/IOL = 3mA maximum, IOH = -2 mA maximum for all outputs and bidirectionals.
2/ RTAD 0, 1, 2, 3, 4 and RTADPAR only.
2A/ All inputs, 6MCK (clock) and bidirectionals other than those in note 2, 2B & 2C.
2B/For signal TEST only.
2C/ For signal Master Reset only.
3/ Input clock (running) = 6MHz, Master Reset < 0.7V, all remaining Inputs are Open and All Outputs and Bidirectionals have no load.
ABSOLUTE MAXIMUM RATINGS (ANALOG TRANSCEIVER)
Parameter Min Max Units
+5VAA / +5VAB /+5VBA /+5VBB -0.3 7.0 V
Receiver Differential Voltage - 10 Vp-p V
Receiver Common-Mode Voltage -5.0 +5.0 Vdc
Driver Peak Output Current - 800 mA
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
ANALOG TRANSCEIVER RECOMMENDED OPERATING CONDITIONS
Parameter Min Max Unit
+5VAA / +5VAB /+5VBA /+5VBB 4.75 5.5 V
Receiver Differential Voltage (See Point A Figure 4) - 4.0 VP-P
Receiver Common-Mode Voltage (See Figure 4) -1.75 +5 VDC
Driver Peak Output Current - 700 mA
Serial Data Rate - 1.0 MHz
Case Operating Temperature -55 +125 °C
ANALOG TRANSCEIVER CHARACTERISTICS (OVER FULL TEMPERATURE RANGE)
Parameter Min Max Unit Notes
Differential Input Level -8 +8 Vp-p 1,3
Input Common-Mode Voltage -1.75 +5 V 1,3
Threshold Voltage 0.6 1.1 V 4
ANALOG TRANSCEIVER CHARACTERISTICS (OVER FULL TEMPERATURE RANGE)
Parameter Sym Test Conditions
(See Figure 4) Min Max Unit Notes
Differential Output Voltage VO35 ohm load, Point A
70 ohm load, Point C
6.0
18
9.0
26
Vp-p
Vp-p
1
Differential Output Noise VON Inhibited, Point A - 10 mVp-p 3
Terminal Input Impedance ZIN Transmitter off
1 Mhz sine wave
As measured from the 1553
bus (direct coupled) Point A
2.0 - KΩ1
Differential Offset Voltage Vos 35 ohm load, Point A
70 ohm load, Point C
-
-
±90
±250
mV
mV
1, 3, 5
1,5
Rise/Fall Time tR & tF35 or 70 ohm load
Points A or C
100 300 nSec 1
ANALOG TRANSCEIVER POWER SUPPLY CHARACTERISTICS (EACH CHANNEL)
Parameter Sym Test Conditions Min Max Unit Notes
Supply Current ICC1 Standby - 25 mA 1,2
ICC2 25% duty cycle - 160 mA 1,2
ICC3 50% duty cycle - 290 mA 1,2
ICC4 100% duty cycle - 550 mA 1,2,3
Notes:
1/ VCC = 5.0 Volts dc +/-0.1 Volts dc unless otherwise specified.
2/ All specifications and limits are for a single channel with no connections made to the other channel.
3/ Parameters shall be tested as part of device initial characterization and after design and process changes. Parameter shall be
guaranteed to limits specified in above tables for all lots not specifically tested.
4/ Threshold determined by first no response to a receive 32 word command.
5/ Measured 2.5µSec after the mid-bit zero crossing of the last parity bit of a 660µSec transmission.
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
REMOTE TERMINAL OPERATION
Receive Data Operation
All valid data words associated with a valid receive data command word for the RT are passed to the subsystem.
The RT examines all command words from the bus and will respond to valid (i.e. correct Manchester, parity
coding etc.) commands which have the correct RT address (or broadcast address if the RT broadcast option is
enabled). When the data words are received, they are decoded and checked by the RT and, if valid, passed to the
subsystem on a word by word basis at 20 µs intervals. This applies to receive data words in both Bus Controller
to RT and RT to RT messages. When the RT detects that the message has finished, it checks that the correct
number of words have been received and if the message is fully valid, then a Good Block Received signal is sent
to the subsystem, which must be used by the subsystem as permission to use the data just received.
The subsystem must therefore have a temporary buffer store up to 32 words long into which these data words can
be placed. The Good Block Received signal will allow use of the buffer store data once the message has been
validated.
If a block of data is not validated, then Good Block Received will not be generated. This may be caused by any
sort of message error or by a new valid command for the RT being received on another bus to which the RT must
switch.
Transmit Data Operation
If the RT receives a valid transmit data command addressed to the RT, then the RT will request the data words
from the subsystem for transmission on a word by word basis. To allow maximum time for the subsystem to
collect each data word, the next word is requested by the RT as soon as the transmission of the current word has
commenced.
It is essential that the subsystem should provide all the data words requested by the RT once a transmit sequence
has been accepted. Failure to do so will be classed by the RT as a subsystem failure and reported as such to the
Bus Controller.
Control of Data Transfers
This section describes the detailed operation of the data transfer mechanism between the RT and subsystems. It
covers the operations of the signals DTRQ, DTAK, IUSTB, H/L, GBR, NBGT, TX/RX during receive data and
transmit data transfers. Figures 29 and 30 show typical interfacing logic.
Figures 5 and 15 shows the operation of the data handshaking signals during a receive command with one data
word. When the RT has fully checked the command word, NBGT is pulsed low, which can be used by the
subsystem as an initialization signal. TX/RX will be set low indicating a receive command. When the first data
word has been fully validated, DTRQ is set low. The subsystem must then reply within approximately 1.5 µs by
setting DTAK low. This indicates to the RT that the subsystem is ready to accept data. The data word is then
passed to the subsystem on the internal highway IH08-IH715 in two bytes using IUSTB as a strobe signal and
H/L as the byte indicator (high byte first followed by low byte). Data is valid about both edges of IUSTB. Signal
timing for this handshaking is shown in Figure 15. Also see Figures 19 and 20.
If the subsystem does not declare itself busy, then it must respond to DTRQ going low by setting DTAK low
within approximately 1.5 us. Failure to do so will be classed by the RT as a subsystem failure and reported as
such to the Bus Controller.
It should be noted that IUSTB is also used for internal working in the RT. DTRQ being low should be used as an
enable for clocking data to the subsystem with IUSTB.
Once the receive data block has finished and been checked by the RT, GBR is pulsed low if the block is entirely
correct and valid. This is used by the subsystem as permission to make use of the data block. If no GBR signal is
generated, then an error has been detected by the RT and the entire data block is invalid and no data words in it
may be used.
If the RT is receiving data in an RT to RT transfer, the data handshaking signals will operate in an identical
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
fashion but there will be a delay of approx 70 µs between NBGT going low and DTRQ first going low. Figures 6
and 15 show the operation of the data handshaking signals during transmit command with one data word. As
with the receive command discussed previously, NBGT is pulsed low if the command is valid and for the RT.
TX/RX will be set high indicating a transmit data command. While the RT is transmitting its status word, it
requests the first data word from the subsystem by setting DTRQ low. The subsystem must then reply within
approximately 13.5 µs by setting DTAK low. By setting DTAK low, the subsystem is indicating that it has the
data word ready to pass to the RT. Once DTAK is set low by the subsystem, DTRQ should be used together with
H/L and TX/RX to enable first the high byte and then the low byte of the data word onto the internal highway
IH08-IH715. The RT will latch the data bytes during IUSTB, and will then return DTRQ high. Data for each byte
must remain stable until IUSTB has returned low. Signal timing for this handshaking is shown in Figure 15.
Additional Data Information Signals
At the same time as data transfers take place, a number of information signals are made available to the
subsystem. These are INCMD, the subaddress lines SA0-SA4, the word count lines WC0-WC4 and current word
count lines CWC0-CWC4. Use of these signals is optional.
INCMD will go active low while the RT is servicing a valid command for the RT. The subaddress,
transmit/receive bit, and word count from the command word are all made available to the subsystem as
SA0-SA4, TX/RX and WC0-WC4 respectively. They may be sampled when INCMD goes low and will remain
valid while INCMD is low. See Figure 11.
The subaddress is intended to be used by the subsystem as an address pointer for the data block. Subaddress
0 and 31 are mode commands, and there can be no receive or transmit data blocks associated with these. (Any
data word associated with a mode command uses different handshaking operations. If the subsystem does not use
all the subaddresses available, then some of the subaddress lines may be ignored.
The TX/RX signal indicates the direction of data transfer across the RT - subsystem interface. Its use is described
in the previous section.
The word count tells the subsystem the number of words to expect to receive or transmit in a message, up to 32
words. A word count of all 0s indicates a count of 32 words.
The current word count is set to 0 at the beginning of a new message and is incremented following each data
word transfer across the RT - subsystem interface. (It is clocked on the falling edge of the second IUSTB pulse in
each word transfer). It should be noted that there is no need for the subsystem to compare the word count and
current word count to validate the number of words in a message. This is done by the RT.
SUBSYSTEM USE OF STATUS BITS AND MODE COMMANDS
General Description
Use of the status bits and the mode commands is one of the most confusing aspects of MIL-STD-1553B. This is
because much of their use is optional, and also because some involve only the RT while others involve both the
RT and the subsystem.
The ACT3492 allows full use to be made of all the Status Bits, and also implements all the Mode Commands.
External programming of the Terminal Flag and Subsystem Flag Bits plus setting of the Message Error Bit on
reception of an illegal command when externally decoded is available. The subsystem is given the opportunity to
make use of Status Bits, and is only involved in Mode Commands which have a direct impact on the subsystem.
The mode commands in which the subsystem may be involved are Synchronize, Sychronize with data word,
Transmit Vector Word, Reset and Dynamic Bus Control Acceptance. The Status Bits to which the subsystem has
access, or control are Service Request, Busy, Dynamic Bus Control Acceptance, Terminal Flag, Subsystem Flag,
and Message Error Bit. Operation of each of these Mode Commands and of the Status Bits is described in the
following sections.
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
All other Mode Commands are serviced internally by the RT. The Terminal Flag and Message Error Status Bits
and BIT Word contents are controlled by the RT; however the subsystem has the option to set the Message Error
Bit and to control the reset conditions for the Terminal Flag and Subsystem Flag Bits in the Status Word, and the
Transmitter Timeout, Subsystem Handshake, and Loop Test Fail Bits in the BIT Word.
Synchronize Mode Commands
Once the RT has validated the command word and checked for the correct address, the SYNC line is set low. The
signal WC4 will be set low for a Synchronize mode command, and high for a Synchronize with data word mode
command (See Figure 9). In a Synchronize with data word mode command, SYNC remains low during the time
that the data word is received. Once the data word has been validated, it is passed to the subsystem on the internal
highway IH08-IH715 in two bytes using IUSTB as a strobe signal and H/L as the byte indicator (high byte first
followed by low byte). SYNC being low should be used on the enable to allow IUSTB to clock synchronize
mode data to the subsystem.
If the subsystem does not need to implement either of these mode commands, the SYNC signal can be ignored,
since the RT requires no response from the subsystem.
Transmit Vector Word Mode Command
Figures 8 and 17 illustrates the relevant signal timings for an RT receiving a valid Transmit Vector Word mode
command. The RT requests data by setting VECTEN low. The subsystem should use H/L to enable first the high
byte and then the low byte of the Vector word onto the internal highway IH08-IH715.
It should be noted that the RT expects the Vector word contents to be already prepared in a latch ready for
enabling onto the internal highway when VECTEN goes low. If the subsystem has not been designed to handle
the Vector word mode command, it will be the fault of the Bus Controller if the RT receives such a command.
Since the subsystem is not required to acknowledge the mode command, the RT will not be affected in any way
by Vector word circuitry not being implemented in the subsystem. It will however transmit a data word as the
Vector word, but this word will have no meaning.
Reset Mode Command
Figure 7 shows the relevant signal timings for an RT receiving a valid reset mode command. Once the command
word has been fully validated and serviced, the RESET signal is pulsed low. This signal may be used as a reset
function for subsystem interface circuitry.
Dynamic Bus Allocation
This mode command is intended for use with a terminal which has the capability of configuring itself into a bus
controller on command from the bus. The line DBCREQ (See Figure 7) cannot go true unless the DBCACC line
was true at the time of the valid command, i.e. tied low. For terminals acting only as RTs, the signal DBCACC
should be tied high (inactive), and the signal DBCREQ should be ignored and left unconnected.
Use of the Busy Status Bit
The Busy Bit is used by the subsystem to indicate that it is not ready to handle data transfers either to or from the
RT.
The RT sets the bit to logic one if the BUSY line from the subsystem is active low at the time of the second
falling edge of INCLK after INCMD goes low. This is shown in Figures 14 and 20. Once the Busy bit is set, the
RT will stop all receive and transmit data word transfers to and from the subsystem. The data transfers in the
Synchronize with data word and Transmit Vector word mode commands are not affected by the Busy bit and will
take place even if it has been set.
It should be noted that a minimum of 0.5 µs subaddress decoding time is given to the subsystem before setting of
status bits. This allows the subsystem to selectively set the Busy bit if for instance one subaddress is busy but
others are ready. This option will prove useful when an RT is interfacing with multiple subsystems.
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
Use of the Service Request Status Bit
The Service Request bit is used by the subsystem to indicate to the Bus Controller that an asynchronous service
is requested.
The timing of the setting of this bit is the same as the Busy bit and is shown in Figures 14 and 20. Use of
SERVREQ has no effect on the RT apart from setting the Service Request bit.
It should be noted that certain mode commands require that the last status word be transmitted by the RT instead
of the current one, and therefore a currently set status bit will not be seen by the Bus Controller. Therefore the
user is advised to hold SERVREQ low until the requested service takes place.
Use of the Subsystem Status Bit
This status bit is used by the RT to indicate a subsystem fault condition. If the subsystem sets SSERR low at any
time, the subsystem fault condition in the RT will be set, and the Subsystem Flag status bit will subsequently be
set. The fault condition will also be set if a handshaking failure takes place during a data transfer to or from the
subsystem. The fault condition is cleared on power-up or by a Reset mode command.
Dynamic Bus Control Acceptance Status Bit
DBCACC, when set true, enables an RT to configure itself into a Bus Controller, if the subsystem has the
capability, by allowing DBCREQ to pulse true and BIT TIME 18 to be set in the status response. If Dynamic Bus
Control is not required then DBCACC must be tied high. DBCACC tied high inhibits DBCREQ and clears BIT
TIME 18 in the status response.
OPTIONAL STATUS WORD CONTROL
Message Error Bit
The ACT3492 monitors all receptions for errors and sets the Message Error Bit as prescribed in
MIL-STD-1553B. The subsystem designer may, however, exercise the option of monitoring for illegal
commands and forcing the Message Error Bit to be set.
The word count and subaddress lines for the current command are valid when INCMD goes low. The subsystem
must then determine whether or not the word count or subaddress is to be considered illegal by the RT. If either
of them is considered illegal, the subsystem must produce a positive-going pulse called MEREQ. The
positive-going edge of MEREQ must occur within 500 nSec of the falling edge of INCMD .
Subsystem Flag and Terminal Flag Bits
The conditions that cause the Subsystem Flag and Terminal Flag Bits in the Status Word to be reset may be
controlled by the subsystem using the ENABLE, BIT DECODE, NEXT STATUS, and STATUS UPDATE
inputs. If ENABLE is inactive (high), then the Terminal Flag and Subsystem Flag behavior is the same as
described below: (i.e. the other three option lines are disabled).
Subsystem Flag Bit
This bit is reset to logic zero by a power up initialization or the servicing of a legal mode command to reset
the remote terminal (code 01000).
This bit shall be set in the current status register if the subsystem error line, SSERR, from the subsystem
ever goes active low. This bit shall also be set if an RT/subsystem handshaking failure occurs. This bit,
once set, shall be repeatedly set until the detected error condition is known to be no longer present.
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
Terminal Flag Bit
This bit is reset to logic zero by a power up initialization or the servicing of a legal mode command to reset
the remote terminal (code 01000). This bit can be set to logic one in the current status register in four
possible ways:
1) If the RX detects any message encoding or content error in the terminals transmission. A loop test
failure, LTFAIL, will be signalled which shall cause the Terminal Flag to be set and the transmission
aborted.
2) If a transmitter timeout occurs while the terminal is transmitting.
3) If a remote terminal self test fails.
4) If there is a parity error in the hard wired address to the RX chip.
This bit, once set, shall be repeatedly set until the detected error condition is known to be no longer present.
The transmission of this bit as a logic one can be inhibited by a legal mode command to inhibit terminal flag
bit (code 00110). Similarly, this inhibit can be removed by a mode command to override inhibit terminal
flag bit (code 00111), a power up initialization or a legal mode command to reset remote terminal (code
01000).
If ENABLE is held low, then the three options described below are available and are essentially independent.
Any, all, or none may be selected. Also, reporting of faults by the subsystem requires that SSERR be latched (not
pulsed) low until the fault is cleared.
Resetting SSF and TF on Receipt of Valid Commands
If ENABLE is selected and the other three option lines are held high, then the Status Word Register will be reset
on receipt of any valid command with the exception of Transmit Status and Transmit Last Command. Note that
in this mode, the TF will never be seen in the Status Word, and the SSF will only be seen if SSERR is latched
low. Also note that the SSF will not be seen in response to Transmit Status or Transmit Last Command if the
preceding Status Word was clear, regardless of actions taken on the SSERR line after the clear status
transmission.
Status Register Update at Fault Occurrence
If STATUS UPDATE is selected (held low), then the TF or SSF will appear in response to a Transmit Status or
Transmit Last Command issued as the first command after the fault occurs. Any other command (except as noted
in the Preserving the BIT Word section) will reset the TF and SSF. Repeated Transmit Status or Transmit Last
Command immediately following the fault will continue to show the TF and/or SSF in the Status Word. Note
that this behavior may not meet the "letter-of-the-spec" as described in MIL-STD-1553B, but is considered the
"preferred" behavior by some users.
TF and SSF Reporting in the Next Status Word
After the Fault
If NEXT STATUS is selected (held low), then the TF or SSF will appear in response to the very next valid
command after the fault except for Transmit Status or Transmit Last Command. The flag(s) will be reset on
receipt of any valid command following the status transmission with the flag(s) set except for Transmit Status,
Transmit Last Command, or as noted in the following section on Preserving the BIT Word.
Preserving the BIT Word
In order to preserve the Transmitter Timeout Flag, Subsystem Handshake Failure, and Loop Test Failure Bits in
the BIT Word, it is necessary to select BIT DECODE (hold it low). This will prevent resetting those bits if the
Transmit Bit Word Mode Command immediately follows the fault or follows a Transmit Last Command or
Transmit Status immediately following the fault. It will also prevent resetting the TF and SSF Bits in the Status
Word. Any other valid commands will cause those BIT Word Bits and the Status Word Bits to be reset.
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
BUS CONTROL OPERATION
To enable its use in a bus controller the ASIC has additional logic within it. This logic can be enabled by pulling
the pin labelled RT/BC low. Once the ASIC is in bus control mode, all data transfers must be initiated by the bus
control processor correctly commanding the ASIC via the subsystem interface. In bus control mode six inputs are
activated which in RT mode are inoperative and four signals with dual functions exercise the second function
(the first being for the RT operation).
To use the ACT3492 as a 1553B bus control interface, the bus control processor must be able to carry out four
basic bus-related functions. Two inputs, BCOPA and BCOPB allow these four options to be selected. The option
is then initiated by sending a negative-going strobe on the BCOPSTB input. BCOPSTB must only be strobed low
when NDRQ is high. This is particularly important when two options are required during a single transfer.See
Figure 28 and Table 1.
With these options all message types and lengths can be handled. Normal BC/RT exchanges are carried out in
option zero. This is selected by setting BCOPA and BCOPB to a zero and strobing BCOPSTB. On receipt of the
strobe, the ACT3492 loads the command word from an external latch using CWEN and H/L. The command
word is transmitted down the bus. The TX/RX bit is, however, considered as being its inverse and so if a transmit
command is sent to a RT (Figure 21), the ACT3492 in BC mode believes it has been given a receive command.
As the RT returns the requested number of data words plus its status, the BC carries out a full validation check
and passes the data into the subsystem using DTRQ, DTAK, H/L, IUSTB and CWC as in RT operation. It also
supplies GBR at the end of a valid transmission. Conversely, a receive command sent down the bus is interpreted
by the BC as a transmit command, and so the requisite data words are added to the command word. See
Figure 22.
For mode commands, where a single command word is required, option one is selected by strobing BCOPSTB
when BCOPA is high and BCOPB is low. On receiving the strobe, the command word is loaded from the
external latch using CWEN and H/L, the correct sync and parity bits are added and the word transmitted (See
Figure 23). Mode commands followed by a data word requires option two. Option two, selected by strobing
BCOPSTB while BCOPA is low and BCOPB is high, loads a data word via DWEN and H/L, adds sync and
parity and transmits them to the bus (See Figure 25). If the mode code transmitted required the RT to return a
data word, then selecting option three by strobing BCOPSTB when BCOPA and BCOPB are both high will
identify that data word and if validated, output it to the subsystem interface using RMDSTB and H/L. This
allows data words resulting from mode codes to be identified differently from ordinary data words and routed
accordingly (See Figure 24). All received status words are output to the subsystem interface using STATSTB
and H/L.
In BC option three, if the signal PASMON is active, then all data appearing on the selected bus is output to the
subsystem using STATSTB for command and status words or RMDSTB for data words. See Passive Monitor.
RT to RT transfers require the transmission of two command words. A receive command to one RT is
contiguously followed by a transmit command to the other RT. This can be achieved by selecting option one
followed by option zero for the second command. The strobe (BCOPSTB) for option zero must be delayed until
NDRQ has gone low and returned high following the strobe for option one. The RT transmissions are checked
and transferred in the subsystem interface to the bus control processor (See Figure 26).
BC must wait for RTO to pulse before issuing subsequent messages.
PASSIVE MONITOR
The Monitor Mode may be utilized to analyze or collect all activities which occur on a selected bus. This is
initiated by selecting a bus, placing the unit in BC option three and setting PASMON low. All data appearing on
the selected bus is output to the subsystem using STATSTB for Command and Status Words or RMDSTB for
Data Words. See Figure 27.
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
AUTOMATED SELF-TEST
The ACT3492 has been designed to fully support a wrap-around self-test which ensures a high degree of fault
coverage. The monolithic circuit includes all circuitry required to perform the self-test.
Self-test can be an on-line or off-line function which is initiated by simple subsystem intervention. The
DRVINH signal selects on-line or off-line testing. The circuit accomplishes the on-line test without accessing
the MIL-STD-1553 data bus by providing an internal data path which connects the encoder circuitry directly to
the decoder circuitry. The transceiver is inhibited during this on-line test. The off-line test is designed to include
the transceiver as well as the protocol device. This mode will generally be useful as an off-line card test where
no live bus is in use.
To initiate the self-test a word is placed in the Vector Word Latch, Loop Test Enable (LTEN) is held low, and the
Loop Test Trigger (LTTRIG) signal is pulsed low. The primary bus will be tested with the word that resides in
the Vector Word Latch, encoded then looped back, decoded and presented to the subsystem as a normal data
transfer would be accomplished. The secondary bus is sequentially tested after the primary bus is completed via
Request Bus A (REQBUSA) utilizing the same word residing in the Vector Word Latch. Upon completion of
each test, pass/fail signals will be asserted reporting the results of the test. This test implementation verifies
MIL-STD-1553 protocol compliance; proper sync character, 16 data bits, Manchester II coding, odd parity,
contiguous word checking and a bit by bit comparison of the transmitted data. The self-test circuitry increases
the fault coverage by insuring that the internal function blocks; encoder, decoder, and internal control circuitry
are operating correctly. An effective data pattern to accomplish this is HEX AA55 since each bit is toggled,
(8 bit internal highway) on a high/low byte basis. The total time required to complete the self-test cycle is
89 microseconds. The Loop Test Enable signal must remain in the low state throughout the diagnostic cycle.
11
SCD3492 Rev C 7/10/07 Aeroflex Plainview
PIN DESCRIPTION
Signal Direction Pin Signal Description
RTAD 0-4 INPUT K6,K5
J5,H5
F4
RT address lines - These should be hardwired by the user. RTAD4
is the most significant bit.
RTADPAR INPUT J6 RT address parity line - This must be hardwired by the user to give
odd parity.
BIT DECODE INPUT J4 Bitword Decode - When held low, prevents resetting TXTO Bit,
HSFAIL Bit, and LTFAIL Bit in the BIT Word (as well as TF and
SSF Bits in the Status Word) upon receipt of a Transmit Bit Word
Mode Command.
BCSTEN 1 INPUT F5 Broadcast command enable Bus 1 - When low the recognition of
broadcast command is prevented on Bus 1.
BCSTEN 0 INPUT G5 Broadcast command enable Bus 0 - When low the recognition of
broadcast command is prevented on Bus 0.
6MCK (Clock) INPUT E4 6 Megahertz master clock.
IH 08 (LSB)
IH 19
IH 210
IH 311
IH 412
IH 513
IH614
IH715 (MSB)
BIDIR E9
D6
D7
A9
D8
B9
D9
C9
Internal Highway - Bi-directional 8 bit highway on which 16 bit
words are passed in two bytes. IH 715 is the most significant bit of
each byte, the most significant byte being transferred first. The
highway should only be driven by the subsystem when data is to be
transferred to the RT.
DTRQ OUTPUT K10 Data Transfer Request - Goes low to request a data transfer
between the ASIC and subsystem. Goes high at the end of the
transfer.
DTAK INPUT F6 Data Transfer Acknowledge - Goes low to indicate that the
subsystem is ready for the data transfer.
IUSTB OUTPUT G6 Interface Unit Strobe - This is a double pulse strobe used to transfer
the two bytes of data
H/L OUTPUT J9 High/Low - Indicates which byte of data is on the internal highway.
Logic level "0" for least significant byte.
GBR OUTPUT J7 Good Block Received - Pulses low for 500ns when a block of data
has been received by the ASIC and has passed all the validity and
error checks.
NBGT OUTPUT G9 New Bus Grant - Pulses low whenever a new command is accepted
by the ASIC.
MEREQ INPUT E8 Message Error Request - Positive-going edge will cause Message
Error Bit in Status Word to be set.
TX/RX OUTPUT H10 Transmit/Receive - The state of this line informs the subsystem
whether it is to transmit or receive data. The signal is valid while
INCMD is low.
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
INCMD OUTPUT K9 In Command - Goes low when the RT is servicing a valid
command. The subaddress and word count lines are valid while the
signal is low.
WC0-WC4 OUTPUT B7,C8
A6,B6
A4
Word Count - These five lines specify the requested number of data
words to be received or transmitted. Valid when INCMD is low.
SA0-SA4 OUTPUT J10,K8
H7,K3
H2
Sub Address - These five lines are a label for the data being
transferred. Valid when INCMD is low.
CWC0-CWC4 OUTPUT H4,H8
K4,J8
K1
Current Word Count - These five lines define which data word in
the message is currently being transferred.
SYNC OUTPUT G7 Synchronize - Goes low when a synchronize mode code is being
serviced.
VECTEN/DWEN OUTPUT G8 Vector Word Enable/DataWord Enable - In the RT mode, this
signal is provided to enable the contents of the vector word latch
(which is situated in the subsystem) onto the ASIC’s internal
highway. This signal, when in the Bus Controller mode, is used to
enable mode code data from the subsystem onto the internal
highway.
RESET OUTPUT C4 Reset - This line pulses low for 500ns on completion of the servicing
of a valid and legal mode command to reset remote terminal.
SSERR INPUT A5 Subsystem Error - By taking this line low, the subsystem can set
the Subsystem Flag in the Status Word.
BUSY INPUT C7 Busy - This signal should be driven low if the subsystem is not ready
to perform a data transfer to or from the ASIC.
SERVREQ INPUT A3 Service Request - This signal should be driven low to request an
asynchronous transfer and left low until the transfer has taken place.
INCLK OUTPUT G10 Internal Clock (2 MHz) - This is made available for
synchronization use by the subsystem if required. However, many of
the outputs to the subsystem are asynchronous.
EOT OUTPUT H9 End of Transmission - Goes low if a valid sync plus two data bits
do not appear in time to be contiguous with preceding word.
RTADER OUTPUT A1 Remote Terminal Address Error - This line goes low if an error is
detected in the RT address parity of the selected receiver. Any
receiver detecting an error in the RT address will turn itself off.
HSFAIL OUTPUT B5 Handshake Failure - This line pulses low if the allowable time for
DTAK response has been exceeded during the ASIC/subsystem data
transfer handshaking.
LSTCMD/CWEN OUTPUT D5 Last Command/Command Word Enable - This line pulses low
when servicing a valid and legal mode command to transmit last
command. When in RT mode this line must not be used to enable
data from the subsystem. This line also pulses low, when in the Bus
Control mode, when a command word is required for transmission.
PIN DESCRIPTION (con’t)
Signal Direction Pin Signal Description
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
STATEN/
STATSTB
OUTPUT K7 Status Enable/Status Strobe - This line pulses low to enable the
status word onto the internal highway for transmission. When in RT
mode this line must not be used to enable data from the subsystem.
This line also pulses high, when in the Bus Control mode, to strobe
received status words into the subsystem. When PASMON is true
this line pulses high for Command and Status words.
STAT UPDATE INPUT E6 Status Update - When held low, causes TF or SSF to appear in
Status Word response to Transmit Status or Transmit Last
Command issued immediately after fault occurrence
BITEN/RMDSTB OUTPUT C6 Built In Test Enable/Receive Mode Data Strobe - This line pulses
low when servicing a valid and legal mode command to transmit the
internal BIT word. This signal is for information only and must not
be used to enable data from the subsystem. This line also pulses high
when in the Bus Control mode when mode data is received to be
passed to the subsystem and when data is passed to the subsystem
during PASMON.
DWSYNC OUTPUT G3 Data Word Sync - This line goes low if a data word sync and two
Manchester biphase bits are valid.
ENABLE INPUT E7 Enable - When held low, enables Bit Decode, Next Status, and
Status Update program lines.
CMSYNC OUTPUT G4 Command Word Sync - This line goes low if a command word
sync and two Manchester biphase bits are valid.
NDRQ OUTPUT D10 No Data Required - This line goes low if the encoder transmit
buffer is full i.e. another word is going to be transmitted. This signal
is for information only and must not be used to enable data from the
subsystem.
NEXT STAT INPUT A10 Next Status - When held low, causes TF or SSF to appear in very
next Status Word after fault occurrence (except for Transmit Status
or Transmit Last Command).
MASTER RESET INPUT B8 Master Reset - A logic low on this input (100 nSec minimum) will
reset the interface.
PASMON INPUT F8 Passive Monitor - When functioning as a Bus Controller this line
acts as a passive monitor select. The active going edge of this line
will cause the REQBUS lines to be latched and that bus, now
selected will be monitored so long as PASMON remains low. All
traffic on the bus will be handed, after validation, to the subsystem
via STATSTB for status and commands words, and RMDSTB for
data words.
BCOPSTB INPUT F7 Bus Controller Operation Strobe - When functioning as a Bus
Controller a low going pulse on this line will initiate the selected bus
controller operation on the requested bus, using BCOPA&B and
REQBUSA&B.
BCOPA INPUT B10 Bus Control Operation A - Least significant bit of the bus
controller operation select lines.
BCOPB INPUT C10 Bus Control Operation B - Most significant bit of the bus controller
operation select lines.
PIN DESCRIPTION (con’t)
Signal Direction Pin Signal Description
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SCD3492 Rev C 7/10/07 Aeroflex Plainview
REQBUS A BIDIR E5 Request Bus A - This line, when in RT mode, is the least significant
bit of the bus request lines which specify the origin of the command,
i.e. they are sources. When in BC mode these lines are sinks and
specify which bus is to be used for the next command.
REQBUS B BIDIR H6 Request Bus B - Most significant bit of the bus request lines. (See
above for description.)
RT/BC INPUT B4 Remote Terminal/Bus Control - This line when high causes the
ASIC to function as a remote terminal. When low the ASIC
functions as a bus controller or passive monitor.
DBCACC INPUT B3 Dynamic Bus Control Accept - This line should be permanently
tied low if a subsystem is able to accept control of the bus if offered.
LTFAIL OUTPUT E2 Loop Test Fail - This line goes low if any error in the transmitted
waveform is detected or if any parity error in the hardwired RT
address is detected.
ERROR OUTPUT F2 Error - This line latches low if a Manchester or parity error is
detected. It is reset by the next CMSYNC (RT mode) and also by
RTO in the BC mode.
RTO OUTPUT F3 Reply Time Out - This signal will pulse low whenever the reply
time for a transmitting terminal has been exceeded. This line is
intended for the bus controller use.
TXTO OUTPUT C3 Transmitter Time Out - This line latches low if the transmitter time
out limits are exceeded.
PARER OUTPUT D3 Parity Error - This line will pulse low if a parity error is detected by
the decoder.
MANER OUTPUT E3 Manchester Error - This line will pulse low if a Manchester error is
detected by the decoder.
DBCREQ OUTPUT C5 Dynamic Bus Control Request - This line will pulse low when the
status reply for a mode code Dynamic Bus Control has finished
where the accept bit was set.
VALD OUTPUT C2 Valid Data - This line will pulse low when a valid data word is
received.
DRVINH INPUT H3 Driver Inhibit - Selects on-line or off-line testing during automated
self test. When high self test is on-line. Must be high when LTEN is
high.
LTEN INPUT A7 Loop Test Enable - Enables automated self-test when low.
Normally high.
LTTRIG INPUT A8 Loop Test Trigger - When pulsed low while LTEN is low
automated self-test is initiated. LTEN pulse width should be 100ns
< PW < 5µs.
TX/RX A1
TX/RX A2
BIDIR B2
B1
Bus A Transmit/Receive - HIGH output to the primary side of the
coupling transformer that connects to the A Channel of the 1553
Bus.
PIN DESCRIPTION (con’t)
Signal Direction Pin Signal Description
15
SCD3492 Rev C 7/10/07 Aeroflex Plainview
TX/RX A1
TX/RX A2
BIDIR D2
D1
Bus A Transmit/Receive - LOW output to the primary side of the
coupling transformer that connects to the A Channel of the 1553
Bus.
TX/RX B1
TX/RX B2
BIDIR G1
G2
Bus B Transmit/Receive - HIGH output to the primary side of the
coupling transformer that connects to the B Channel of the 1553
Bus.
TX/RX B1
TX/RX B2
BIDIR J1
J2
Bus B Transmit/Receive - LOW output to the primary side of the
coupling transformer that connects to the B Channel of the 1553
Bus.
+5VAA
+5VAB
POWER E1
A2
+5V Input Power Supply connection for the A Channel Tranceiver
+5VBA
+5VBB
POWER K2
F1
+5V Input Power Supply connection for the B Channel Tranceiver
VCC (Logic) POWER E10 +5V Input Power Supply connection for the Digital Protocol section.
GND A POWER C1 Power Supply return for the A Channel Tranceiver.
GND B POWER H1 Power Supply return for the B Channel Tranceiver.
DIGGND 1
DIGGND 2
POWER F9
F10
Power Supply return for the Digital Protocol section.
TEST Input D4 Factory Test Point - Do not connect.
CASE Connected to DIGGND1 and DIGGND2
PIN DESCRIPTION (con’t)
Signal Direction Pin Signal Description
16
SCD3492 Rev C 7/10/07 Aeroflex Plainview
NEXT
Controller to
RT Transfer Receive
Command Data
Word Data
Word . . . . Data
Word . . Status
Word §Command
Word
RT to
Controller
Transfer
NEXT
Transmit
Command . . Status
Word Data
Word Data
Word . . . . Data
Word §Command
Word NEXT
RT to RT
Transfer Receive
Command Transmit
Command . . Status
Word Data
Word Data
Word . . . . Data
Word . . Status
Word §Command
Word
Mode Command
Without Data
Word
NEXT
Mode
Command . . Status
Word §Command
Word
Mode Command
With Data
Word
(Transmit)
NEXT
Mode
Command . . Status
Word Data
Word §Command
Word
Mode Command
With Data
Word
(Receive)
NEXT
Mode
Command Data
Word . . Status
Word §Command
Word NOTE: § = Intermessage Gap
. . = Response Time
Figure 1 – TYPICAL MESSAGE FORMATS
T/R
Bit Mode Code Function Associated
Data Word Broadcast Command
Allowed
1 00000 Dynamic Bus Control No No
1 00001 Synchronize No Yes
1 00010 Transmit Status Word No No
1 00011 Initiate Self Test No Yes
1 00100 Transmitter Shutdown No Yes
1 00101 Override Transmitter Shutdown No Yes
1 00110 Inhibit Terminal Flag Bit No Yes
1 00111 Override lnhibit Terminal Flag Bit No Yes
1 01000 Reset Remote Terminal No Yes
1 01001 Reserved No TBD
↓ ↓ ↓ ↓
1 01111 Reserved No TBD
1 10000 Transmit Vector Word Yes No
0 10001 Synchronize Yes Yes
1 10010 Transmit Last Command Yes No
1 10011 Transmit BlTWord Yes No
0 10100 Selected Transmitter Shutdown Yes Yes
0 10101 Override Selected Tra nsmitter
Shutdown Yes Yes
1 or 0 1011 0 Reserved Yes TBD
↓ ↓ ↓ ↓
1 or 0 1111 1 Reserved Yes TBD
Figure 2 – ASSIGNED MODE CODES
17
SCD3492 Rev C 7/10/07 Aeroflex Plainview
BIT TIMES 1234567891011121314151617181920
COMMAND
WORD 515 5 1
SYNC REMOTE TERMINAL
ADDRESS T/R SUBADDRESS/MODE DATA WORD
COUNT/MODE CODE P
DATA WORD 16 1
SYNC DATA P
1LSB 20
BIT WORD 1514131211109876543210 P
SYNC
STATUS
WORD 5 111 3 11111 1
SYNC REMOTE TERMINAL
ADDRESS RESERVED
Note: T/R – Transmit/Receive
P – Parity
Figure 3 – WORD FORMATS
Transmitter Timeout on Bus 3
Transmitter Timeout on Bus 2
Transmitter Timeout on Bus 1
Transmitter Timeout on Bus 0
Bus 3 Shutdown
Bus 2 Shutdown
Bus 1 Shutdown
Bus 0 Shutdown
Broadcast Transmit Data Received
Word Count High
Word Count Low
Illegal Mode Command
Mode T/R Bit Wrong
Loop Test Failure
Subsystem Handshake Failure
Transmitter Timeout Flag
Message Error
Instrumentation
Service Request
Broadcast Command Received
Busy
Subsystem Flag
Dynamic Bus Control Acceptance
Terminal Flag
Parity
18
SCD3492 Rev C 7/10/07 Aeroflex Plainview
1 : 2.12 55Ω
NOTES:
55Ω
1 : 1.5
TX/RX
55Ω
55Ω
1 : 1.41
Transformer Coupled Stubs
Direct Coupled Stubs
C
B
Zoi VCMT = ±10 VPK
Zoi
A
A
1. Point C, Vo = 18 Vpp Minimum
TX/RX
TX/RX
TX/RX
70Ω
35Ω35Ω
2. Transformer self Impedance ≥ 3KΩ at 1MHz
3. VCMT for transformer coupled stubs
VCMD for direct coupled stubs
±VCMD
DC to 2MHZ
STUB ISOLATION
STUB
+
-
Figure 4 – TRANCEIVER SIGNAL POINTS
19
SCD3492 Rev C 7/10/07 Aeroflex Plainview
DATA STATUS
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
VALID
VALID
CWC = 00000
SA 3-4
SA 0-2
WC 0-4
CWC 0-4
TX/RX
IH 08-715
DTRQ
NDRQ
VALD
NBGT
STATEN
IUSTB
INCMD
H/L
RTO
REQBUS B
REQBUS A
DWSYNC
EOT
CMSYNC
VALID
PREVIOUS VALUE
GBR
Figure 5 – RT RECEIVE 1 WORD (NON MODE)
CWC = 00001
Mid-SyncMid-Parity
TRESP
TD1
TD1
Mid-Sync
Mid-Sync
TD2
PW1
POINT A
Fig 4 CMD 16 DATA BITS P DATA 16 DATA BITS P STAT 16 DATA BITS P
3-STATE WITH PULLUP
COMMAND
HL HLHL
(Request Bus 1)
DTAK = 0
20
SCD3492 Rev C 7/10/07 Aeroflex Plainview
DATASTATUS
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
VALID
VALID
CWC = 00000
SA 3-4
SA 0-2
WC 0-4
CWC 0-4
TX/RX
IH 08-715
NDRQ
DTRQ
NBGT
STATEN
IUSTB
INCMD
H/L
RTO
REQBUS B
REQBUS A
DWSYNC
EOT
CMSYNC
VALID
PREVIOUS VALUE
Figure 6 – RT TRANSMIT 1 WORD (NON MODE)
CWC = 00001
Mid-SyncMid-Parity
TRESP
TD1
Mid-Sync Mid-Parity
TD2
PW2
PW1
TD1
PW1
3-STATE WITH PULLUP
COMMAND
HL HL HL
CMD 16 DATA BITS P DATA 16 DATA BITS PSTAT 16 DATA BITS P
POINT A
Fig 4
DTAK = 0
21
SCD3492 Rev C 7/10/07 Aeroflex Plainview
Figure 7 – RT TRANSMIT MODE (NO DATA)
DURING “SYNC NO DATA”
DURING “RESET REMOTE TERMINAL”
TD2
COMMAND STATUS
PREVIOUS VALUE
3-STATE WITH PULLUP
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
VALID
VALID
VALID
CWC = 00000
SA 3-4
SA 0-2
WC 0-4
CWC 0-4
TX/RX
IH 08-715
STATEN
NDRQ
SYNC
NBGT
INCMD
IUSTB
RESET
H/L
RTO
REQBUS B
REQBUS A
DBCREQ
EOT
CMSYNC
IF DBCACC = 0
Mid-Parity
TD1
PW1
Mid-SyncMid-Parity
PW1
TRESP
HLHL
STAT 16 DATA BITS PCMD 16 DATA BITS P
POINT A
Fig 4
(Request Bus 1)
22
SCD3492 Rev C 7/10/07 Aeroflex Plainview
DATA
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
VALID
VALID
CWC = 00000
SA 3-4
SA 0-2
WC 0-4
CWC 0-4
TX/RX
IH 08-715
BITEN
NDRQ
VECTEN
NBGT
STATEN
IUSTB
INCMD
H/L
RTO
REQBUS B
REQBUS A
DWSYNC
EOT
CMSYNC
ACTIVE DURING “TRANSMIT BIT WORD’
INPUT DURING ‘TRANSMIT VECTOR‘ ONLY
ACTIVE DURING “TRANSMIT LAST COMMAND”
VALID
PREVIOUS VALUE
LSTCMD
Figure 8 – RT TRANSMIT MODE (WITH DATA)
Mid-SyncMid-Parity
TRESP
3-STATE WITH PULLUP COMMAND
HL HL HL
STATUS
CMD 16 DATA BITS P STAT 16 DATA BITS P DATA 16 DATA BITS P
POINT A
Fig 4
(Request Bus 0)
23
SCD3492 Rev C 7/10/07 Aeroflex Plainview
Figure 9 – RT RECEIVE MODE (WITH DATA )
PW1
DATA STATUS
PREVIOUS VALUE
3-STATE WITH PULLUP
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
VALID
VALID
VALID
CWC = 00000
SA 3-4
SA 0-2
WC 0-4
CWC 0-4
TX/RX
IH 08-715
SYNC
NDRQ
VALD
NBGT
STATEN
IUSTB
INCMD
H/L
RTO
REQBUS B
REQBUS A
DWSYNC
EOT
CMSYNC
COMMAND
TD1
Mid-SyncMid-Parity
TRESP
CMD 16 DATA BITS P DATA 16 DATA BITS P STAT 16 DATA BITS P
POINT A
Fig 4
HL HLHL
(Request Bus 0)
24
SCD3492 Rev C 7/10/07 Aeroflex Plainview
Figure 10 – RT RT to RT TRANSFER
L3 STATE WITH PULLUP
H LH LH
PREVIOUS VALUE VALID
PREVIOUS VALUE VALID
PREVIOUS VALUE VALID
GBR
TX/RX
DWSYNC
CMSYNC
EOT
RTO
NBGT
NDRQ
DTRQ
DTAK
H/L
IUSTB
STATEN
INCMD
SA(4:0)
WC(4:0)
CWC(4:0)
REQBUSA
REQBUSB
IH(7:0)
CMD1 16 DATA BITS P
Fig 4
POINT A
4 to 12 µs
CMD2 16 DATA BITS P STAT2 16 DATA BITS P
TRESP
DATA 16 DATA BITS P STAT1 16 DATA BITS P
25
SCD3492 Rev C 7/10/07 Aeroflex Plainview
Figure 11 – COMMAND WORD TRANSFER (ALL)
COMMAND
IUSTB
H/L
INCMD
REQBUS A
REQBUS B
NBGT
MID PARITY – COMMAND WORD
1553 BUS
TDSULOW
PW2
DATA BITS P
TD1
TD2
PW1
TD3 TD4
CWC = 00000
PREVIOUS STATE
PREVIOUS STATE
PREVIOUS STATE
VALID
VALID
VALID
VALID
PREVIOUS STATE
PREVIOUS STATE
WC0–WC4
SA3–SA4
TX/RX
CWC0–CWC4
SA0–SA2
IH08–715 LOHI
3 STATE WITH PULLUP
PW2
TDHLDHI
TD6
TDHLDLOTDSUHI
TD5
TD5
DATA WORD WHEN REQUIRED
26
SCD3492 Rev C 7/10/07 Aeroflex Plainview
Figure 12 – RT TRANSMIT COMMAND SERVICE (NON-MODE)
Figure 13 – RT RECEIVE COMMAND SERVICE (NON-MODE)
TX/RX
CWC0–CWC4
IH08–715
IUSTB
H/L
INCMD
DTRQ
NDRQ
STATEN
GBR
CWC0–CWC4
IH08–715
IUSTB
H/L
INCMD
DTRQ
NDRQ
STATEN
VALD
RX DATA
3 STATE WITH PULLUP
LOWHI
CWC = CWC + 1CWC
LOWHI STATUS
PW1
TIED TO DTAK
CWC = 00001CWC = 00000
PREVIOUS STATE
COMMAND STATUS TX DATA
3 STATE WITH PULLUP
PREVIOUS STATE
LOWHILOWHI LOWHI
TDSULO
TDSUHI
TD2 TD3
TD1
TD4
PW1
TD5
TDHLDLO
TIED TO DTAK
TD1
27
SCD3492 Rev C 7/10/07 Aeroflex Plainview
SA4-SA0
NBGT
1.5µs Minimum
Valid
Valid
Valid
Previous command value
Previous command value
Previous command value
BUSY Latched here
TX/RX
WC4-WC0
CWC4-CWC0
INCMD
INCLK
Figure 14 – NEW COMMAND INITIALIZATION
28
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Figure 15 – DATA HANDSHAKE TRANSMIT / RECEIVE
CWC3-CWC4
IH08-IH715
CWC CWC=CWC+1
RX DATA
LH
IUSTB
H/L
H/L
IH08-IH715
CWC3-CWC4
IUSTB
DTAK
DTRQ TDHS
RX DATA
CWC CWC=CWC+1
TDHSHLD
TRANSMIT
RECEIVE
TD1
TDSUHI
TDHLDHI TDHLDLO
TDSULO
LH
TD2
TDSUHI
TDHLDHI
TDHLDLO
TDSULO
TD1
TD2
29
SCD3492 Rev C 7/10/07 Aeroflex Plainview
LOWHILOWHI
Figure 16 – RT TRANSMIT MODE SERVICE (NO DATA)
INCMD
SYNC
NDRQ
H/L
IUSTB
TX/RX
CWC0-CWC4
STATEN
COMMAND STATUS
PREVIOUS STATE
PREVIOUS STATE
3 STATE WITH PULLUP
CWC = 00000
TD1
IH08-715
PW2
TD2
PW1
30
SCD3492 Rev C 7/10/07 Aeroflex Plainview
INCMD
VECTEN
NDRQ
STATEN
H/L
TX/RX
IUSTB
IH08-715
CWC0-CWC4 PREVIOUS STATE
PREVIOUS STATE
3 STATE WITH PULLUP
COMMAND STATUS
CWC = 00000
HI LOW LOW
Figure 18 – RT RECEIVE MODE SERVICE (WITH DATA)
BITEN
LSTCMD
INCMD
VALD
SYNC
H/L
IUSTB
IH08-715 3 STATE WITH PULLUP
MODE DATA STATUS
HI LOW HI LOW
NDRQ
STATEN
Figure 17 – RT TRANSMIT MODE SERVICE (WITH DATA)
TD1
TD4
PW1
PW2
TD3
MODE DATA
HI LOW
TD2
HI
TDSUHI TDHLDHI
TDHLDLO
TDSULO
HI
TD3
TD1 TD2
TDSUHI
TDHLDHI
TDSULO TDHLDLO
31
SCD3492 Rev C 7/10/07 Aeroflex Plainview
PARAMETRICS
Test Conditions:
Vcc = +5V± 10%, Vss = 0, RL(PULL-UP) = 1.6K
Ω,
RL(PULL-DOWN) = 5K
Ω,
CL = 20 pf (Including Test Jig)
TRANSMIT
(NON MODE) (See Figure 6)
Symbol Limits
Min Max Units
TRESP 10.5 11.75 µs
PW1 275 550 ns
PW2 475 525 ns
TD1 6.5 7.0 µs
TD2 18.5 19 µs
TRANSMIT COMMAND SERVICE
(NON MODE) (See Figure 12)
Symbol Limits
Min Max Units
PW1 1.4 1.6 µs
TD1 6.7 6.9 µs
TD2 10 75 ns
TD3 225 275 ns
TD4 1.7 1.8 µs
TD5 700 800 ns
COMMAND WORD TRANSFER
(ALL) (See Figure 11)
Symbol Limits
Min Max Units
PW1 475 525 ns
PW2 225 275 ns
TD1 3.0 3.4 µs
TD2 275 350 ns
TD3 50 500 ns
TD4 450 550 ns
TD5 - 75 ns
TD6 50 - ns
TDSUHI 400 - ns
TDHLDHI 150 - ns
TDSULO 400 - ns
TDHLDLO 150 - ns
RECEIVE
(NON MODE) (See Figure 5)
Symbol Limits
Min Max Units
TRESP 9.0 10 µs
PW1 875 1325 ns
TD1 3.65 3.95 µs
TD2 2.8 3.5 µs
RECEIVE COMMAND SERVICE
(NON MODE) (See Figure 13)
Symbol Limits
Min Max Units
PW1 400 600 ns
TD1 700 800 ns
DATA HANDSHAKE
(See Figure 15)
Symbol Limits
Min Max Units
TRANSMIT
TDHS (TX) 0 13.5 µs
TDHSHLD 750 - ns
TDSUHI 25 - ns
TDHLDHI 25 - ns
TDSULO 25 - ns
TDHLDLO 25 - ns
TD1 675 800 ns
TD2 50 - ns
RECEIVE
TDHS (RX) 0 1.5 µs
TDHSHLD 750 - ns
TDSUHI 400 - ns
TDHLDHI 150 - ns
TDSULO 400 - ns
TDHLDLO 150 - ns
TD1 675 800 ns
TD2 50 - ns
32
SCD3492 Rev C 7/10/07 Aeroflex Plainview
TRANSMIT MODE
(WITH DATA) (See Figure 8)
Symbol Limits
Min Max Units
TRESP 9.5 10.5 µs
TRANSMIT MODE SERVICE
(WITH DATA) (See Figure 17)
Symbol Limits
Min Max Units
PW1 1.4 1.6 µs
PW2 1.4 1.6 µs
TD1 6.2 6.3 µs
TD2 400 600 ns
TD3 10 - µs
TD4 700 800 ns
TDSUHI - 100 ns
TDHLDHI 0 - ns
TDSULO - 100 ns
TDHLDLO 0 - ns
TRANSMIT MODE
(NO DATA) (See Figure 7)
Symbol Limits
Min Max Units
TRESP 9.5 11 µs
PW1 400 600 ns
TD1 600 1000 ns
TD2 150 275 ns
RECEIVE MODE
(WITH DATA) (See Figure 9)
Symbol Limits
Min Max Units
TRESP 9.0 10 µs
PW1 21.75 23.0 µs
TD1 200 300 ns
RECEIVE MODE SERVICE
(WITH DATA) (See Figure 18)
Symbol Limits
Min Max Units
TD1 725 825 ns
TD2 680 760 ns
TD3 375 825 ns
TDSUHI 400 - ns
TDHLDHI 150 - ns
TDSULO 400 - ns
TDHLDLO 150 - ns
TRANSMIT MODE SERVICE
(NO DATA) (See Figure 16)
Symbol Limits
Min Max Units
PW1 2.45 2.55 µs
PW2 1.4 1.6 µs
TD1 450 550 ns
TD2 700 800 ns
PARAMETRICS con’t
Test Conditions:
Vcc = +5V± 10%, Vss = 0, RL(PULL-UP) = 1.6K
Ω,
RL(PULL-DOWN) = 5K
Ω,
CL = 20 pf (Including Test Jig)
33
SCD3492 Rev C 7/10/07 Aeroflex Plainview
NBGT
NDRQ
TX/RX
IUSTB
STATEN
CWC(4:0)
INCLK
CLOCK
GBR
IH(7:0)
DTRQ
DTAK
INCMD
NDRQ
H/L
IUSTB
STATEN
CWC(4:0)
INCMD
CLOCK
GBR
IH(7:0)
DTRQ
DTAK
SA(4:0)
WC(4:0)
Figure 20 INCLK TIMING – TRANSMIT (DTAK DELAYED)
Figure 19 INCLK TIMING – RECEIVE (DTAK DELAYED)
INCLK
H/L
DATA LODATA HI STAT HI STAT LO
CMD HI CMD LO STAT HI STAT LO DATA HI DATA LO
PREVIOUS SA3,4 VALID ALL VALID
BUSY sampled here (Both Transmit and Receive)
VALIDPREVIOUS
34
SCD3492 Rev C 7/10/07 Aeroflex Plainview
RT/BC
BCOPA
BCOPB
BCOPSTB
REQBUSA
REQBUSB
VALD
TX/RX
DWSYNC
CMSYNC
EOT
RTO
NBGT
NDRQ
DTRQ
DTAK
H/L
IUSTB
STATSTB
RMDSTB
CWEN
DWEN
INCMD
IH(7:0)
GBR
SA(4:0)
WC(4:0)
CWC(4:0)
Figure 21 – BC TRANSMIT 1 WORD (NON MODE)
4 TO 12 µs
HL
COMMAND DATASTATUS
3 STATE WITH PULLUP
CMD 16 DATA BITS P STAT 16 DATA BITS P DATA 16 DATA BITS P
POINT A
Fig 4
HLHL
SAPREVIOUS VALUE
WC = 00001PREVIOUS VALUE
CWC = 00000 CWC = CWC + 1
35
SCD3492 Rev C 7/10/07 Aeroflex Plainview
RT/BC
BCOPSTB
VALD
TX/RX
DWSYNC
CMSYNC
EOT
RTO
NBGT
NDRQ
DTRQ
DTAK
H/L
IUSTB
STATSTB
RMDSTB
CWEN
DWEN
INCMD
IH(7:0)
SA(4:0)
WC(4:0)
CWC(4:0)
Figure 22 – BC RECEIVE 1 WORD (NON MODE)
4 TO 12 µs
HLHL HL
COMMAND DATA STATUS
3 STATE WITH PULLUP
CMD 16 DATA BITS P STAT 16 DATA BITS P DATA 16 DATA BITS P
BCOPA
BCOPB
REQBUSA
REQBUSB
SAPREVIOUS VALUE
WC = 00001PREVIOUS VALUE
CWC = 00000 CWC = CWC + 1
POINT A
Fig 4
36
SCD3492 Rev C 7/10/07 Aeroflex Plainview
4 TO 12 µs
Figure 23 – BC TRANSMIT MODE (NO DATA)
COMMAND STATUS
3 STATE WITH PULLUP
CMD 16 DATA BITS P STAT 16 DATA BITS P
HLHL
Fig 4
BCOPSTB
VALD
TX/RX
DWSYNC
CMSYNC
EOT
RTO
NBGT
NDRQ
DTRQ
DTAK
H/L
IUSTB
STATSTB
RMDSTB
CWEN
DWEN
INCMD
SA(4:0)
WC(4:0)
CWC(4:0)
BCOPA
BCOPB
REQBUSA
REQBUSB
POINT A
GBR
IH(7:0)
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
RT/BC = 0
37
SCD3492 Rev C 7/10/07 Aeroflex Plainview
Figure 24 – BC TRANSMIT MODE (WITH DATA)
4 TO 12 µs
COMMAND STATUS DATA
3 STATE WITH PULLUP
CMD 16 DATA BITS P
HL HL HL
Fig 4
BCOPSTB
VALD
TX/RX
DWSYNC
CMSYNC
EOT
RTO
NBGT
NDRQ
DTRQ
DTAK
H/L
IUSTB
STATSTB
RMDSTB
CWEN
DWEN
INCMD
SA(4:0)
WC(4:0)
CWC(4:0)
BCOPA
BCOPB
REQBUSA
REQBUSB
POINT A
GBR
IH(7:0)
STAT 16 DATA BITS P DATA 16 DATA BITS P
RT/BC = 0
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
38
SCD3492 Rev C 7/10/07 Aeroflex Plainview
Figure 25 – BC RECEIVE MODE (WITH DATA)
COMMAND STATUS
3 STATE WITH PULLUP
CMD 16 DATA BITS P DATA 16 DATA BITS P
HLHLHL
Fig 4
BCOPSTB
VALD
TX/RX
DWSYNC
CMSYNC
EOT
RTO
NBGT
NDRQ
DTRQ
DTAK
H/L
IUSTB
STATSTB
RMDSTB
CWEN
DWEN
INCMD
SA(4:0)
WC(4:0)
CWC(4:0)
BCOPA
BCOPB
REQBUSA
REQBUSB
POINT A
GBR
IH(7:0) DATA
PREVIOUS VALUE
PREVIOUS VALUE
PREVIOUS VALUE
RT/BC = 0
STAT 16 DATA BITS P
4 to 12 µs
39
SCD3492 Rev C 7/10/07 Aeroflex Plainview
Figure 26 – BC RT TO RT TRANSFER
COMMAND
CMD1 16 DATA BITS P
3 STATE WITH PULLUP
HL HL HL HL HL
COMMAND STATUSDATASTATUS
Fig 4
BCOPA
VALD
TX/RX
CMSYNC
DWSYNC
EOT
RTO
NBGT
NDRQ
DTRQ
DTAK
H/L
IUSTB
STATSTB
RMDSTB
CWEN
DWEN
INCMD
SA(4:0)
WC(4:0)
CWC(4:0)
BCOPB
BCOPSTB
REQBUSA
REQBUSB
POINT A
GBR
IH(7:0)
PREVIOUS VALUE
CWC = CWC + 1
PREVIOUS VALUE
PREVIOUS VALUE
SA = ?
WC = ?
RT/BC = 0
CMD2 16 DATA BITS P STAT2 16 DATA BITS P DATA 16 DATA BITS P STAT1 16 DATA BITS P
4 to 12 µs
4 to 12 µs
40
SCD3492 Rev C 7/10/07 Aeroflex Plainview
Figure 27 MONITOR MODE
3 STATE WITH PULLU P HLHL
BCOPA
VALD
STATSTB
PASMON
POINT A
RMDSTB
IH(7:0)
REQBUSA
BCOPB
RT/BC
CMSYNC
REQBUSB
TX/RX
DMSYNC
EOT
RTO
NBGT
H/L
CSYNC DATA P DSYNC DATA P
COMMAND or DATA WORD
STATUS WORD
Fig 4
41
SCD3492 Rev C 7/10/07 Aeroflex Plainview
First or Only
BCOPSTB
Second
BCOPSTB
Transfer Type BCOP-B BCOP-A BCOP-B BCOP-A
Normal Data (BC to RT / RT to BC) 0 0 N/A N/A
RT to RT 0 1 0 0
Mode Codes (No Data)
[T/R = 0]
00h Dynamic Bus Control
01h Synchronize (No DATA)
02h Transmit Status
03h Initiate Self Test
04h Transmitter Shutdown
05h Override TX Shutdown
06h Inhibit TF Flag
07h Override Inhibit TF Flag
08h Reset Remote Terminal
01N/AN/A
Mode Codes (Data RT to BC)
[T/R = 1]
10h Transmit Vector Word
12h Transmit Last Command
13h Transmit Bit Word
0111
Mode Codes (Data BC to RT)
[T/R = 0]
11h Synchronize (With DATA)
14h Selected TX Shutdown
15h Override Selected TX Shutdown
0110
Table 1 – BCOP SEQUENCES
BCOP-A,BCOP-B
BCOPSTB
VALIDVALID
SecondFirst
t4
t3
t1t2t1
t3
t4
REQBUS-A,REQBUS-B
250nS < t1 < 5µS
7µS < t2 < 17µS
t3 < 500nS
t4 > 1.5µS
Limits:
Figure 28 – BCOP SEQUENCE TIMING
42
SCD3492 Rev C 7/10/07 Aeroflex Plainview
LOW BYTE DATA
HIGH DATA CLOCK
LOW DATA CLOCK
IH715 (C9)
ACT3492
HIGH BYTE DATA
IH614 (D9)
IH513 (B9)
IH412 (D8)
IH311 (A9)
IH210 (D7)
IH19 (D6)
IH08 (E9)
TX/RX (H10)
VECTEN (G8)
DTRQ (K10) or
H/L (J9)
18
17
14
13
8
7
4
3
11
1
10
19
16
15
12
9
6
5
2
+Vcc
20
18
17
14
13
8
7
4
3
11
1
10
19
16
15
12
9
6
5
2
20
+Vcc
D7
D6
D5
D4
D3
D2
D1
D0
OE
GND
Q7
Q6
Q5
Q4
Q8
Q2
Q1
Q0
VCC
D7
D6
D5
D4
D3
D2
D1
D0
OE
GND
Q7
Q6
Q5
Q4
Q8
Q2
Q1
Q0
VCC
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Figure 29 TYPICAL TRANSMIT DATA INTERFACE
DTAK may be connected to
DTRQ, Ground or controlled
43
SCD3492 Rev C 7/10/07 Aeroflex Plainview
LOW BYTE DATA
HIGH BYTE ENABLE
LOW BYTE ENABLE
IH715 (C9)
ACT3492
HIGH BYTE DATA
IH614 (D9)
IH513 (B9)
IH412 (D8)
IH311 (A9)
IH210 (D7)
IH19 (D6)
IH08 (E9)
TX/RX (H10)
IUSTB (G6)
SYNC (G7) or
H/L (J9)
18
17
14
13
8
7
4
3
1
19
16
15
12
9
6
5
2
20
+Vcc
D7
D6
D5
D4
D3
D2
D1
D0
OE
GND
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Figure 30 TYPICAL RECEIVE DATA INTERFACE
Q7
Q6
Q5
Q4
Q8
Q2
Q1
Q0
VCC
11
10
18
17
14
13
8
7
4
3
1
19
16
15
12
9
6
5
2
20
+Vcc
D7
D6
D5
D4
D3
D2
D1
D0
OE
GND
Q7
Q6
Q5
Q4
Q8
Q2
Q1
Q0
VCC
11
10
DTRQ (K10)
DTAK may be connected to
DTRQ, Ground or controlled
44
SCD3492 Rev C 7/10/07 Aeroflex Plainview
PACKAGE PIN OUT DESCRIPTION BY PIN - ACT3492
Pin # Function Pin # Function Pin # Function
A1 RTADER D5 LSTCMD/CWEN G9 NBGT
A2 +5VAB D6 IH19 G10 INCLK
A3 SERVREQ D7 IH210 H1 GNDB
A4 WC4 D8 IH412 H2 SA4
A5 SSERR D9 IH614 H3 DRVINH
A6 WC2 D10 NDRQ H4 CWC0
A7 LTEN E1 +5VAA H5 RTAD3
A8 LTTRIG E2 LTFAIL H6 REQBUSB
A9 IH311 E3 MANER H7 SA2
A10 NEXTSTAT E4 6MCK H8 CWC1
B1 TXRX A2 E5 REQBUSA H9 EOT
B2 TXRX A1 E6 STATUPDATE H10 TX/RX
B3 DBCACC E7 ENABLE J1 TXRX B1
B4 RT/BC E8 MEREQ J2 TXRX B2
B5 HSFAIL E9 IH08 J3 PASS
B6 WC3 E10 +5V LOGIC J4 BITDECODE
B7 WC0 F1 +5VBB J5 RTAD2
B8 MASTER RESET F2 ERROR J6 RTADPAR
B9 IH513 F3 RTO J7 GBR
B10 BCOPA F4 RTAD4 J8 CWC3
C1 GNDA F5 BCSTEN 1 J9 H/L
C2 VALD F6 DTAK J10 SA0
C3 TXTO F7 BCOPSTB K1 CWC4
C4 RESET F8 PASMON K2 +5VBA
C5 DBCREQ F9 DIG GND 1 / CASE K3 SA3
C6 BITEN/RMDSTB F10 DIG GND 2 / CASE K4 CWC2
C7 BUSY G1 TXRX B1 K5 RTAD1
C8 WC1 G2 TXRX B2 K6 RTAD0
C9 IH715 G3 DWSYNC K7 STATEN/STATSTB
C10 BCOPB G4 CMSYNC K8 SA1
D1 TXRX A2 G5 BCSTEN 0 K9 INCMD
D2 TXRX A1 G6 IUSTB K10 DTRQ
D3 PARER G7 SYNC
D4 TEST G8 VECTEN/DWEN
45
SCD3492 Rev C 7/10/07 Aeroflex Plainview
PACKAGE PIN OUT DESCRIPTION BY FUNCTION - ACT3492
Function Pin # Function Pin # Function Pin #
+5VAA E1 H/L J9 RTAD4 F4
+5VAB A2 HSFAIL B5 RTADER A1
+5VBA K2 IH08 E9 RTADPAR J6
+5VBB F1 IH19 D6 RTO F3
+5V LOGIC E10 IH210 D7 SA0 J10
6MCK E4 IH311 A9 SA1 K8
BCOPA B10 IH412 D8 SA2 H7
BCOPB C10 IH513 B9 SA3 K3
BCOPSTB F7 IH614 D9 SA4 H2
BCSTEN 0 G5 IH715 C9 SERVREQ A3
BCSTEN 1 F5 INCLK G10 SSERR A5
BITDECODE J4 INCMD K9 STATEN/STATSTB K7
BITEN/RMDSTB C6 IUSTB G6 STATUPDATE E6
BUSY C7 LSTCMD/CWEN D5 SYNC G7
CMSYNC G4 LTEN A7 TEST D4
CWC0 H4 LTFAIL E2 TX/RX H10
CWC1 H8 LTTRIG A8 TXRX A1 B2
CWC2 K4 MANER E3 TXRX A2 B1
CWC3 J8 MASTER RESET B8 TXRX B1 G1
CWC4 K1 MEREQ E8 TXRX B2 G2
DBCACC B3 NBGT G9 TXRX A1 D2
DBCREQ C5 NDRQ D10 TXRX A2 D1
DIG GND 1 / CASE F9 NEXTSTAT A10 TXRX B1 J1
DIG GND 2 / CASE F10 PARER D3 TXRX B2 J2
DRVINH H3 PASMON F8 TXTO C3
DTAK F6 PASS J3 VALD C2
DTRQ K10 REQBUSA E5 VECTEN/DWEN G8
DWSYNC G3 REQBUSB H6 WC0 B7
ENABLE E7 RESET C4 WC1 C8
EOT H9 RT/BC B4 WC2 A6
ERROR F2 RTAD0 K6 WC3 B6
GBR J7 RTAD1 K5 WC4 A4
GNDA C1 RTAD2 J5
GNDB H1 RTAD3 H5
46
SCD3492 Rev C 7/10/07 Aeroflex Plainview
CERAMIC COFIRED 100-Pin PGA PACKAGE OUTLINE
Pin A1 & ESD
Designator
.100
TYP
.065 DIA TYP
.065 SQ
.040 REF 45°
.900
1
2
3
4
5
6
7
8
9
10
ABCDEFGHJK
1.060 SQ
±.015
CHAMFER BRAZE RING .020 REF 45°
CHAMFER 4X
.050
4X
.050
±.005
.018
±.002
.160
MAX
.180
±.010
Standoffs
Pins B2, J2, B9 & J9
47
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Tel: 805-778-9229
Fax: 805-778-1980
WEST COAST
Tel: 949-362-2260
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CENTRAL
Tel: 719-594-8017
Fax: 719-594-8468
www.aeroflex.com info-ams@aeroflex.com
Aeroflex Microelectronic Solutions reserves the right to
change at any time without notice the specifications, design,
function, or form of its products described herein. All
parameters must be validated for each customer's application
by engineering. No liability is assumed as a result of use of
this product. No patent licenses are implied.
SCD3492 Rev C 7/10/07
Our passion for perfo rm an ce is de fined by thre e
attributes represented by these thre e ico ns:
solution-minded, perform an ce-d riven an d custo m er-focused
ORDERING INFORMATION
Model Number DESC Part Number Package
ACT3492 Pending 1.06" x 1.06" Ceramic 100-pin
PGA Plug In
Notes
1. Contact factory for extended military temperature range products
2. The ACT3492 can be used as a 100-pin equivalent to the 12MHz BUS-65600 DDC part. Please refer to the CT2565 data sheet for a
form-fit-functional replacement to the discontinued DDC BUS-65600.
3. Contact the factory for a 100-pin equivalent to the 16MHz, BC/RT/MT, BUS-65610 MIL-STD-1553 terminal.
PART NUMBER BREAKDOWN
Base
Screening
ACT 3492 – I
ACT Series
I = Industrial Temp, -40°C to +85°C
R = Extended Temp, -55°C to +110°C Note 1
T = Military Temp, -55°C to +125°C
Blank = Military Temp, -55°C to +125°C, Screened *
* Screened to the individual test methods of MIL-STD-88 3
