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IDTQS3R800
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE QUICKSWITCH INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 1999
1999 Integrated Device Technology, Inc. DSC-5539/-c
IDTQS3R800
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS 10-BIT LOW
RESISTANCE QUICKSWITCH WITH
PRECHARGED OUTPUTS
DESCRIPTION:
The QS3R800 is a 10-bit high-speed CMOS bus switch controlled by
a single enable (ON) input. When ON is low, the switch is on and port A is
connected to port B. When ON is high, the switch between port A and port
B is open and port B is precharged to the bias voltage. The low ON resistance
(2.5Ω) of the QS3R800 allows inputs to be connected to outputs without
adding propagation delay and without generating additional noise. The
QS3R800 also precharges the B port to a user-selectable bias voltage to
minimize live-insertion noise, which is useful in VME bus applications.
The QS3R800 is characterized for operation at -40°C to +85°C.
A0B0
B9
A9
ON
VBIAS
FUNCTIONAL BLOCK DIAGRAM
FEATURES:
− 2.5Ω bidirectional switches connect inputs to outputs
− Zero propagation delay
− Undershoot clamp diodes on all switch and control pins
− Outputs precharge voltage to minimize signal distortion during live
insertion
− TTL-compatible input and output levels
− Zero ground bounce
− Available in SOIC and QSOP Packages
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3R800
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE QUICKSWITCH
GND
B9
A9
A8
A6
1
2
3
4
5
6
7
8
9
10
12 13
14
15
16
17
18
19
20
21
22
23
24
11
SO24-2
SO24-8
Vcc
B8
B7
A7
B6
B5
A5
B0
A0
A1B1
B2
A2
A3B3
B4
A4
ON
VBIAS
PIN CONFIGURATION
SOIC/ QSOP
TOP VIEW
ABSOLUTE MAXIMUM RATINGS (1)
Symbol Description Max. Unit
VTERM(2) Supply Voltage to Ground – 0.5 to +7 V
VBIAS Bias Voltage Range – 0.5 to VCC V
VTERM(3) DC Input Voltage VIN – 0.5 to VCC + 0.5 V
VAC AC Input Voltage (pulse width ≤20ns) -3 V
IOUT DC Output Current 128 mA
IIK Input Clamp Current -50 mA
PMAX Maximum Power Dissipation .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 s ections
of this specification is not implied. Exposure to absolute maximum
rating condit ions for ex t ended periods may affect reliability.
2. Vcc Terminals.
3. All terminals except Vcc.
CAPACITANCE
(TA = +25OC, f = 1.0MHz, VIN = 0V, VOUT = 0V)
Pins Typ. Max. (1) Unit
Control Inputs 3 4 pF
Quickswitch Channels (Switch OFF) 5 6 pF
NOTE:
1. This parameter is guarant eed at characterization but not tested.
PIN DESCRIPTION
Pin Names I/O Description
A0 - A9I/O Bus A
B0 - B9I/O Bus B
ON I Bus Switch Enable
VBIAS I Bias Voltage
FUNCTION TABLE(1)
ON B0-B9Function
LA
0
- A9Connect
HV
BIAS Precharge
NOTE:
1. H
=
HIGH Volta
g
e Level
L
=
LOW Volta
g
e Level
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IDTQS3R800
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE QUICKSWITCH INDUSTRIAL TEMPERATURE RANGE
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
0
2
4
6
8
10
12
14
16
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
RON
(ohms)
VIN
(Volts)
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 10%
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
VBIAS Bias Voltage Vcc = 5V 1.3 — Vcc V
IOBias Current Vcc = 4.5V, VBIAS = 2.4V, VO = 0, ON = HIGH 0.25 — — mA
IIN Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ Vcc ——±1
µA
I
OZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ Vcc ——±1
µA
R
ON Switch On Resistance (2) Vcc = Min., VIN = 0V, ION = 30mA —2.5 5 Ω
R
ON Switch On Resistance (2) Vcc = Min., VIN = 2.4V, ION = 15mA —48.5
Ω
NOTES:
1. Typical values are at VCC = 5. 0V , TA = 25°C.
2. During input /output leak age, testi ng al l pi ns are at HIGH or LOW state.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3R800
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE QUICKSWITCH
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
Data inputs = GND
Control Input Toggling at 50% Duty Cycle
— 0.25 mA/MHz
NOTES:
1. For conditions shown as Min. or M ax., use the appropriate values specif i ed under DC Elec trical Characteristics.
2. Typical values are at VCC = 5.0V, TA = 25° C.
3. Per TLL driven input (V IN = 3.4V, cont rol i nputs only). A and B pins do not c ontribute to ∆Icc.
4. This current applies to the control inputs only and represents the current required to switc h internal capacitance at the specified frequency. The A
and B inputs generate no signifi cant AC or DC current s as they transition. This parameter is guaranteed but not producti on tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5.0V ± 10%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
Parameter Min. (1) Typ. Max. Unit
tPLH
tPHL Data Propagation Delay (2, 3)
A to B or B to A — — 0.12 ns
tPZL
tPZH Switch Turn-On Delay
ON to A or B 1.5 — 7.5 ns
tPLZ
tPHZ Switch Turn-Off Delay (2)
ON to A or B 1.5 — 6.5 ns
NOTES:
1. Mini m um s guaranteed but not tested.
2. This param et er i s guaranteed but not tested
3. The bus s wi tch contri butes no propagation delay other than the RC delay of the ON resistance of the switch and the l oad capacitance. The time
const ant for the swit c h al one i s of the order of 0.12ns for 50pF. S i nce this t i me constant is m uch smaller t han the rise and fall times of typical driving
signals , it adds v ery littl e propagat i on del ay to the system. Propagation delay of t he bus switch, when used in a system, is determined by the driving
circui t on the driving side of the s witch and its i nteraction wit h the load on the driven si de.
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IDTQS3R800
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE QUICKSWITCH INDUSTRIAL TEMPERATURE RANGE
IDTQS XXXXX XX
Package
D evice Typ e
Blank Industrial (-40°C to +85°C )
3R800 H igh S peed C M OS 10 -B it Low R esista nce
Q uickS w itch w ith P recharged O utputs
X
Process
Sma ll Ou t line I C (SO2 4-2 )
Q uarter Size Outline P acka ge (SO 24-8)
SO
Q
ORDERING INFORMATION
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