W91320N SERIES
TONE/PULSE DIALER WITH HANDFREE
LOCK AND HOLD FUNCTIONS
Publication Release Date: May 1997
- 1 - Revision A2
GENERAL DESCRIPTION
The W91320N series are Si-gate CMOS ICs that provide the necessary signals for tone or pulse
dialing. The W91320N series provide one-key redial, handfree dialing, hold, redial, and lock
functions.
FEATURES
• DTMF/pulse switchable dialer
• 32-digit redial memory
• Pulse-to-tone (*/T) keypad for long distance call operation
• Uses 5 × 5 keyboard
• Easy operation with redial, flash, pause, and */T keypads
• Pause, pulse-to-tone (*/T) can be stored as a digit in memory
•0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out
•Off-hook delay 300 mS in lock mode ( DP will keep low for 300 mS while off hook)
• First key-in delay 300 mS output in lock mode
• Dialing rate (10, 20 ppS ) selected by bonding option
• Minimum tone output duration: 93 msec.
• Minimum intertone pause: 93 msec.
• Flash break time (73, 100, 300, 600 msec.) selectable by keypad, and the pause time is 1.0 sec.
• On-chip power-on reset
• Uses 3.579545 MHz crystal or ceramic resonator
• Packaged in 18, 20, or 22-pin plastic DIP
• The different dialers in the W91320N series are shown in the following table:
TYPE NO. REPLACEMENT
TYPE NO.
PULSE
(ppS)
FLASH
(mS)
M/B HANDFREE
DIALING
LOCK PACKAGE
(PINS)
W91320N W91320 10 600/100/300/73 Pin - - 18
W91321N W91321 20 600/100/300/73 Pin - - 18
W91320AN W91320A 10 600/100/300/73 Pin Yes - 20
W91321AN W91321A 20 600/100/300/73 Pin Yes - 20
W91320LN W91322L 10 600/100/300/73 Pin - Yes 20
W91320ALN W91322AL 10 600/100/300/73 Pin Yes Yes 22
W91320N SERIES
- 2 -
PIN CONFIGURATIONS
C4
1
2
3
4
5
6
7
8
9
10
HKS
DTMF
MODE
R4
R3
R2
R1
VDD
13
18
20
19
17
16
15
14
12
11 HFO
W91320AN/W91321AN
C1
C2
C3
SS
V
XT
XT
T/P MUTE
HFI
H/P MUTE
DP/C5
W91320ALN
LOCK
C1
C2
C3
C4
SS
V
XT
XT
1
2
3
4
5
6
7
8
9
T/P MUTE 10
HFI
HKS
DTMF
MODE
R4
R3
R2
R1
VDD
13
18
20
19
17
16
15
14
12
11 HFO
NC
21
22
H/P MUTE
DP/C5
W91320N/W91321N
1
2
3
4
5
6
7
8
9HKS
DTMF
MODE
R4
R3
R2
R1
VDD
12
18
17
16
15
14
10
11
13
C1
C2
C3
C4
SS
V
XT
XT
T/P MUTE
H/P MUTE
DP/C5
W91320LN
LOCK
C1
C2
C3
C4
SS
V
XT
XT
1
2
3
4
5
6
7
8
9
T/P MUTE 10 HKS
DTMF
MODE
R4
R3
R2
R1
VDD
13
18
20
19
17
16
15
14
12
11
H/P MUTE NC
DP/C5
W91320N SERIES
Publication Release Date: May 1997
- 3 - Revision A2
PIN DESCRIPTION
SYMBOL 18-PIN 20-PIN 22-PIN I/O FUNCTION
Column-
Row
Inputs
1−4
&
15−18
1−4
&
17−20
1−4
&
19−22
I
The keyboard inputs may be used with
either the standard 5 × 5 keyboard or
the inexpensive single contact (Form A)
keyboard. Electronic input from a µC
can also be used.
A valid key-in is defined as a single row
being connected to a single column
XT, XT 7, 8 7, 8
(8, 9,
W91320LN
only)
8, 9 I, O A built-in inverter provides oscillation
with an inexpensive 3.579545 MHz
crystal or ceramic resonator.
T/P
MUTE
99
(10,
W91320LN
only)
10 O The T/P MUTE is a conventional
CMOS N-channel open drain output.
The output transistor is switched on
during dialing sequence, one-key redial
break and flash break time. Otherwise,
it is switched off.
MODE 13 15
(14,
W91320LN
only)
16 I Pulling mode pin to VSS places the
dialer in tone mode.
Pulling mode pin to VDD places the
dialer in pulse mode. (10 ppS; 20 ppS
for W91321N/321AN M/B = 40:60)
Floating mode pin places the dialer in
pulse mode. (10 ppS; 20 ppS for
W91321N/321AN M/B = 33.3:66.7)
HKS 10 12
(11,
W91320LN
only)
13 I Hook switch input.
HKS = VDD: On-hook state. Chip in
sleeping mode, no operation.
HKS = VSS: Off-hook state. Chip is
enable for normal operation.
HKS pin is pulled to VDD by internal
resistor.
W91320N SERIES
- 4 -
Pin Description, continued
SYMBOL 18-PIN 20-PIN 22-PIN I/O FUNCTION
DP / C5 11 13
(12,
W91320LN
only)
14 O N-channel open drain dialing pulse
output.
Flash key will cause DP to be active in
either tone mode or pulse mode.
The timing diagram for pulse mode is
shown in Figure 1(a, b, c, d).
VDD, VSS 14, 6 16, 6
(16, 7
W91320LN
only)
18, 7 I Power input pins.
H/P
MUTE
55
(6,
W91320LN
only)
6 O The H/P MUTE is a conventional
inverter output. During pulse dialing,
flash break, one-key redial break, and
hold period, this output is active high;
otherwise, it remains in low state.
NC - 15
(W91320LN
only)
17 - No connection.
DTMF 12 14
(13,
W91320LN
only)
15 O In pulse mode, this pin remains in low
state at all time.
In the tone mode, it will output a dual or
single tone.
Detailed timing diagram for tone mode
is shown in Figure 2(a, b, c, d).
Specified Actual Error %
Output Frequency
R1
R2
R3
R4
C1
C2
C3
697
770
852
941
1209
1336
1477
699
766
848
948
1216
1332
1472
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
W91320N SERIES
Publication Release Date: May 1997
- 5 - Revision A2
Pin Description, continued
SYMBOL 18-PIN 20-PIN 22-PIN I/O FUNCTION
HFI,
HFO
- 10, 11
(W91320AN/
321AN)
11, 12 I, O Handfree control pins. The handfree
control state is toggled on by a low
pulse on the HFI input pin. The status
of the handfree control state is
described in the following table:
CU
RRENT
S
TATE
Input HFO Dialing
High Yes
On Hook High Low No
Off Hook High Low Yes
On Hook Off Hook Low Yes
Off Hook Low On Hook Low No
Off Hook High On Hook High Yes
Low
Hook SW.
HFO
NEXT STATE
HFI
HFI
HFI
HFI pin is pulled to VDD by internal
resistor.
Detailed timing diagrams are shown in
Figure 3(a, b, c).
LOCK -5
(6,
W91320LN
only)
5 I The function of this terminal is to
prevent "0" dialing and "9" dialing under
PABX system long distance call control.
When the first key input after reset is 0
or 9, all key inputs, including the 0 or 9
key, become invalid and the chip
generates no output. The telephone is
reinitialized by a reset.
LOCK PIN FUNCTION
Floating Normal dialing mode
V
DD
V
SS
"0," "9" dialing inhibited
"0" dialing inhibited
W91320N SERIES
- 6 -
BLOCK DIAGRAM
ROW
COLUMN
DTMF
XT XT
MODE
RAM
COUNTER
SYSTEM CLOCK
GENERATOR
LOCATION
LATCH
D/A ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
READ/ WRITE
(R1 to R4, Vx)
(C1 to C4)
T/P MUTE
HFO
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
KEYBOARD
INTERFACE
CONVERTER
LOCK
HKS
HFI
DP/C5
H/P MUTE
FUNCTIONAL DESCRIPTION
Keyboard Operation
C1 C2 C3 C4 DP /C5
123 R1
456F1 R2
789F2 HR3
∗/T 0 # R/P1 R R4
R/P2 R F3 F4 VX
•R/P1, R/P2: Redial and pause function key, P1 is 3.6 sec. and P2 is 2.0 sec.
•∗/T: ∗ in tone mode and P→T in pulse mode
•F1, …, F4: Flash keys, the flash break time of F1 = 600 mS, F2 = 100 mS, F3 = 300 mS, F4 = 73
mS
•H: Hold function key
•R: One-key redial function
Notes: D1, ..., Dn, D1', ..., Dn': 0, ..., 9, */T, #
R/P: R/P1 or R/P2.
Fn: F1, ..., F4
W91320N SERIES
Publication Release Date: May 1997
- 7 - Revision A2
Normal Dialing
OFF HOOK (or ON HOOK & HFI ¡ı ), D1 , D2 , ..., Dn
1. D1, D2, …, Dn will be dialed out.
2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits in normal dialing.
Redialing
1. OFF HOOK (or ON HOOK & HFI ¡ı ), D1 , D2 , ..., Dn , Busy,
Come ON HOOK , OFF HOOK (or ON HOOK & HFI ¡ı ), R/P
a. The redial memory content will be dialed out.
b. The R/P key can execute the redial function only as the first key-in after off-hook; otherwise, it
executes pause function.
c. If redialing length oversteps 32 digits, the redialing function will be inhibited.
2. OFF HOOK (or ON HOOK & HFI ¡ı ), D1 , D2 , ..., Dn , Busy, R
a. The one-key redialing function timing diagram is shown in Figure 4.
b. If the dialing of D1 to Dn is finished, pressing the R key will cause the pulse output pin to
go low for 2.2 seconds break time and 0.6 seconds pause time will automatically be added.
c. If the pulses of the dialed digits D1 to Dn have not finished, R will be ignored.
d. The redial function by R key has no break time (2.2 sec.) if it is the first key in after off-hook.
e. The R key uses the same redial buffer as the redial function
by
R/P1 or R/P2 key,
and it is actived during normal dialing or repertory dialing.
Access Pause
OFF HOOK (or ON HOOK & HFI ¡ı ), D1 , D2 , R/P , D3 , ..., Dn
1. The pause function is executed in normal dialing, redial dialing, or memory dialing.
2. The pause duration of 2.0 or 3.6 seconds per pause is selected by keypad, but only one pause time
can be stored in memory.
3. The detailed timing diagram for the pause function is shown in Figure 5.
Pulse-to-tone (*/T)
OFF HOOK (or ON HOOK & HFI ¡ı ), D1 , D2 , ..., Dn , */T , D1' ,
D2' , ..., Dn'
W91320N SERIES
- 8 -
1. If the mode switch is set to pulse mode, then the output signal will be:
D1, D2, …, Dn, Pause (2.0 sec. or 3.6 sec.), D1', D2', …, Dn'
(Pulse) (Tone )
2. If the mode switch is set to tone mode, then the output signal will be:
D1, D2, ..., Dn, *, D1', D2', ..., Dn'
(Tone) (Tone)
3. The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse
mode only by going on-hook.
4. The pulse-to-tone function timing diagram is shown in Figure 6.
Flash
OFF HOOK (or ON HOOK & HFI ¡ı ), Fn
1. Fn = F1, ..., F4
2. The dialer will execute flash break time of 600 mS (F1), 100 mS (F2), 300 mS (F3), or 73 mS (F4)
and all the pause time is 1.0 sec. before the next digit is dialed out.
3. Flash key can not be stored as a digit in memory. The flash key has the first priority among
the keyboard functions.
4. The system will return to the initial state after the flash pause time is finished.
5. The flash function timing diagram is shown in Figure 7.
HOLD
OFF HOOK (or ON HOOK & HFI ¡ı ), H
The hold function is switched on and off by a toggle switch. The keypad will be disabled when in hold
mode. The function timing diagram is shown in Figure 3(a, b, c).
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL RATING UNIT
DC Supply Voltage VDD−VSS -0.3 to +7.0 V
Input/Output Voltage VIL VSS −0.3 V
VIH VDD +0.3 V
VOL VSS −0.3 V
VOH VDD + 0.3 V
Power Dissipation PD120 mW
Operation Temperature TOPR -20 to +70 °C
Storage Temperature TSTG -55 to +150 °C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.
W91320N SERIES
Publication Release Date: May 1997
- 9 - Revision A2
DC CHARACTERISTICS
(VDD-VSS = 2.5V, FOSC. = 3.579545 MHz, TA = 25° C, All outputs unloaded)
PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT
Operating Voltage VDD - 2.0 - 5.5 V
Operating Current IOP Tone, Unloaded - 0.4 0.6 mA
Pulse, Unloaded - 0.2 0.4
Standby Current ISB HKS = VSS, No
load & No key
entry
--15
µA
Memory Retention Current IMR HKS = VDD,
VDD = 1.0V
- - 0.2 µA
DTMF Output Voltage VTO Row group,
RL = 5 KΩ
130 150 170 mVrm
s
Pre-emphasis Col/Row,
VDD = 2.0 to 5.5V
12 3 dB
DTMF Distortion THD RL = 5 KΩ,
VDD = 2.0 to 5.5V
- -30 -23 dB
DTMF Output DC Level VTDC RL = 5 KΩ,
VDD = 2.0 to 5.5V
1.0 - 3.0 V
DTMF Output Sink Current ITL VTO = 0.5V 0.2 - - mA
DP Output Sink Current IPL VPO = 0.5V 0.5 - - mA
T/P MUTE Output Sink
Current
ITML VTMO = 0.5V 0.5 - - mA
H/P MUTE Output IHPH VHPL = 2.0V 0.5 - - mA
Drive/Sink Current IHPL VHPL = 0.5V 0.5 - - mA
HFO Drive/Sink Current IHFH VHFH = 2.0V 0.5 - - mA
IHFL VHFL = 0.5V 0.5 - - mA
Keypad Input Drive Current IKD VI = 0.0V 30 - - µA
Keypad Input Sink Current IKS VI = 2.5V 200 400 - µA
HKS I/P Pull-High Resistor RHK - - 300 - KΩ
Keypad Resistance RK- --5
KΩ
W91320N SERIES
- 10 -
AC CHARACTERISTICS
(VDD−VSS = 2.5V, FOSC. = 3.579545 MHz, TA = 25° C, All outputs unloaded)
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT
Key-in Debounce TKID --20-mS
Key Release Debounce TKRD --20-mS
Off-hook Delay TOFD Lock only - 300 - mS
First Key-in Delay TFKD Lock only - 300 - mS
Pre-digit-pause1TPDP1 Mode = VDD -40 -mS
10 ppS Mode = Floating - 33.3 -
Pre-digit-pause2TPDP2 Mode = VDD -20 -mS
20 ppS Mode = Floating - 16.7 -
Interdigit Pause TIDP 10 ppS - 800 - mS
(Auto Dialing) 20 ppS - 500 -
Make/Break Ratio M:B Mode = VDD - 40:60 - %
Mode = Floating - 33.3:66.7 -
Tone Output Duration TTD Auto dialing - 93 - mS
Intertone Pause TITP Auto dialing - 93 - mS
TFB F1 - 600 -
Flash Break Time F2 - 100 - mS
F3 300
F4 - 73 -
Flash Pause Time TFP F1, F2, F3, F4 - 1.0 - S
Pause Time TPR/P1 - 3.6 - S
R/P2 - 2.0 -
One-key Redial Break
Time
TRB - - 2.2 - S
One-key Redial Pause
Time
TRP - - 600 - mS
Notes:
1. Crystal parameters suggested for proper operation are Rs < 100 Ω, Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF,
FOSC. = 3.579545 MHz ±0.02%.
2. Crystal oscillator accuracy directly affects these times.
W91320N SERIES
Publication Release Date: May 1997
- 11 - Revision A2
TIMING WAVEFORMS
T
IDP
HKS
KEY IN
DP
H/P MUTE
T/P MUTE
2
BM T
IDP T
IDP
T
KID
T
IDP
T
PDP
2
MB
4
T
KRD
3
< 600 mS
< 300 mS
TKID
DTMF
OSC.
Low
OSCILLATION OSCILLATION
TPDP
Figure 1a. Normal Dialing Timing Diagram (Pulse Mode Without Lock Function)
HKS
KEY IN
DP
H/P MUTE
T/P MUTE
TOFD
2
BM TIDP T
IDP
TPDP
T
KID
T
IDP
T
PDP
2
MB
4
T
KID
T
KRD
DTMF
OSC.
Low
OSCILLATION OSCILLATION
T
FKD
3
< 600 mS
< 300 mS
Figure 1b. Normal Dialing Timing Diagram (Pulse Mode with Lock Function)
W91320N SERIES
- 12 -
Timing Waveforms, continued
HKS
KEY IN
DP
H/P MUTE
T/P MUTE
R/P
T
KID
B
MT
IDP T
IDP
T
PDP
MB
DTMF
OSC.
Low
OSCILLATION
T
IDP
< 600 mS
T
KRD
Figure 1c. Auto Dialing Timing Diagram (Pulse Mode Without Lock Function)
HKS
KEY IN
DP
H/P MUTE
T/P MUTE
T
OFD BM T
IDP TIDP
T
PDP
MB
DTMF
OSC.
Low
OSCILLATION
R/P
T
KID
T
IDP
T
FKD
< 600 mS
300 mS
Figure 1d. Auto Dialing Timing Diagram (Pulse Mode with Lock Function)
