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IDTQS3861
HIGH-SPEED CMOS QUICKSWITCH 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
DECEMBER 2000
2000 Integrated Device Technology, Inc. DSC-5767/-c
IDTQS3861
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
10-BIT BUS SWITCH WITH
FLOW-THROUGH PINOUT
A0
A9
B0
B9
BE
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION
The QS3861 provides a set of ten high speed CMOS, TTL-compatible bus
switches. The low ON resistance (5Ω) of the QS3861 allows inputs to be
connected to outputs without adding propagation delay and without gener-
ating additional ground bounce noise. The Bus Enable (BE) signal turns the
switches on.
The QS3861 is characterized for operation at -40°C to +85°C.
FEATURES:
− Enhanced N channel FET with no inherent diode to Vcc
− 5Ω bidirectional switches connect inputs to outputs
− Zero propagation delay, zero ground bounce
− Undershoot clamp diodes on all switch and control inputs
− Available in QSOP, SOIC, and TSSOP Packages
APPLICATIONS
− Hot-swapping, hot-docking
− Voltage translation (5V to 3.3V)
− Power conservation
− Capacitance reduction and isolation
− Bus isolation
− Clock gating
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3861
HIGH-SPEED CMOS QUICKSWITCH 10-BIT BUS SWITCH
PIN CONFIGURATION
SOIC/ QSOP/ TSSOP
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
NC
GND
VCC
BE
1
2
3
4
5
6
7
8
9
10
11
12
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
SO24-2
SO24-8
SO24-9
ABSOLUTE MAXIMUM RATINGS (1)
Symbol Description Max. Unit
VTERM(2) Supply Voltage to Ground – 0.5 to +7 V
VTERM(3) DC Switch Voltage VS– 0.5 to +7 V
VTERM(3) DC Input Voltage VIN – 0.5 to +7 V
VAC AC Input Voltage (pulse width ≤20ns) -3 V
IOUT DC Output Current 120 mA
PMAX Maximum Power Dissipation (TA = 85°C) 0.5 W
TSTG Storage Temperature – 65 to +150 °C
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or
any other c onditions abov e those indic ated in the operati onal sect ions
of this specification is not implied. Exposure to absolute maximum
rating condit i ons for ex tended periods may af fect reliability.
2. Vc c Terminals .
3. All terminals exc ept Vcc .
CAPACITANCE
(TA = +25OC, f = 1.0MHz, VIN = 0V, VOUT = 0V)
Pins Typ. Max. (1) Unit
Control Pins 3 5 pF
Quickswitch Channels (Switch OFF) 5 7 pF
NOTE:
1. This paramet er is guaranteed but not produc tion tested.
PIN DESCRIPTION
Pin Names Description
BE Bus Enable
A0 - A9Bus A
B 0 - B9Bus B
FUNCTION TABLE(1)
BE A0 - A92A, 2Y I/Os
H Hi-Z Disconnect
LB 0 - B9Connect
NOTE:
1. H
=
HIGH Volta
g
e Level
L
=
LOW Volta
g
e Level
Z
=
Hi
g
h-impedence
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IDTQS3861
HIGH-SPEED CMOS QUICKSWITCH 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
RON
(ohms)
VIN
(Volts)
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
16
14
12
10
8
6
4
2
00.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5%
Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit
VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Pins 2 — — V
VIL Input LOW Voltage Guaranteed Logic LOW for Control Pins — — 0.8 V
IIN Input Leakage Current (Control Inputs) (2) 0V ≤ VIN ≤ Vcc — ±0.01 ±1 µA
IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ Vcc, Switches OFF — ±0.01 ±1 µA
RON Switch ON Resistance Vcc = Min., VIN = 0V, ION = 30mA —5 7Ω
R
ON Switch ON Resistance Vcc = Min., VIN = 2.4V, ION = 15mA —1015Ω
V
PPass Voltage (2) VIN = Vcc = 5V, IOUT = -5µA3.7 4 4.2 V
NOTES:
1. Typical values are at V CC = 5. 0V, TA = 25°C.
2. Pas s volt age i s guaranteed but not production t ested.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3861
HIGH-SPEED CMOS QUICKSWITCH 10-BIT BUS SWITCH
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions(1) Typ. (2) Max. Unit
ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or Vcc, f = 0 0.2 3 µA
∆ICC Power Supply Current per Control Input HIGH VCC = Max., VIN = 3.4V(3), f = 0 — 2.5 mA
ICCD Dynamic Power Supply Current per MHz(4) VCC = Max., A and B pins open,
BE Input Toggling at 50% Duty Cycle — 0.25 mA/MHz
NOTES:
1. For conditi ons shown as M i n. or Max. , use the appropriat e values s pecified under DC E l ectric al Characteris t i cs.
2. Typical values are at V CC = 5. 0V, 25°C ambi ent.
3. Per TLL driven i nput (VIN = 3.4V, control inputs only ). A and B pins do not cont ri bute to ∆Icc.
4. This current applies to the control inputs only and represent s the current required to s witch internal capacitanc e at the specified frequenc y. The A
and B inputs generate no significant A C or DC currents as they t ransition. This parameter is guarant eed but not producti on tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5.0V ± 5%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
Parameter Min. (1) Typ. Max. Unit
tPLH
tPHL Data Propagation Delay (2,4)
A to B or B to A — — 0.25 (3) ns
tPZL
tPZH Switch Turn-on Delay
BE to A or B 1.5 — 6.5 ns
tPLZ
tPHZ Switch Turn-off Delay (2)
BE to A or B 1.5 — 5.5 ns
NOTES:
1. Mini m um s are guaranteed but not production tested.
2. This param et er i s guaranteed but not producti on t ested.
3. The time const ant for the switch al one i s of the order of 0.25ns for CL = 50pF.
4. The bus s wi tch contributes no propagation delay other than the RC del ay of the ON res i stance of the switch and the l oad capacit ance. Si nc e this
time c onstant i s much sm al l er than the rise and fall ti m es of typical dri ving signal s, it adds very l i t tle propagation del ay to the system. Propagation
delay of t he bus swit ch, when used i n a system, is determined by the driving circuit on the driving side of t he switch and i ts int eraction with the load
on the driven side.
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IDTQS3861
HIGH-SPEED CMOS QUICKSWITCH 10-BIT BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX XX
Package
D evice Type
Sm all Outline IC (SO 24-2)
Quarter-S ize Outline P ackage (S O 24-8)
Thin S hrink Sm all Outline P ackage (S O24-9)
SO
Q
PA
3861 High Speed CM O S 10-Bit Bus Switch with
Flow-Through Pinout
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