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IDTQS3R862
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
NOVEMBER 1999
1999 Integrated Device Technology, Inc. DSC-5541/1c
INDUSTRIAL TEMPERATURE RANGE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
IDTQS3R862
FUNCTIONAL BLOCK DIAGRAM
FEATURES:
• Enhanced N channel FET with no inherent diode to Vcc
• 2.5ΩΩ
ΩΩ
Ω bidirectional switches connect inputs to outputs
• Zero propagation delay, zero ground bounce
• Undershoot clamp diodes on all switch and control inputs
• Active high and low enable controls
• Bidirectional signal flow
• Available in SOIC and QSOP packages
APPLICATIONS:
• Hot-swapping, hot-docking (low resistance for PCI and
Compact PCI applications)
• Voltage translation (5V to 3.3V)
• Power Conservation
• Capacitance reduction and isloation
• Applications requiring low RON resistance and active high
enabling
• Bus Isolation
• Clock Gating
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS 10-BIT LOW
RESISTANCE BUS SWITCH WITH
ACTIVE HIGH AND LOW ENABLES
DESCRIPTION:
The QS3R862 provides a set of ten high-speed CMOS TTL-compatible
bus switches. The very low ON resistance (2.5Ω) of the QS3R862 allows
inputs to be connected to outputs without adding propagation delay and
without generating additional ground bounce noise. The switches are
controlled by active Low Enable (BE) and active High Enable (BE) controls.
The QS3R862 with 2.5Ω RON resistance is ideal for switching digital
buses as well as for hot-plugging, hot-swapping, and hot-docking applica-
tions. The low RON resistance of the QS3R862 makes it ideal for PCI,
Compact PCI, and VME hot-plugging applications.
The QS3R862 is characterized for operation at -40°C to +85°C.
A0
BE
B0
A9B9
BE
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3R862
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE BUS SWITCH
PIN CONFIGURATION 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 0.5 W
TSTG Storage Temperature –65 to +150 °C
ABSOLUTE MAXIMUM RATINGS(1)
NOTE:
1 . H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedance
BE BE A0 - A9Function
L L Z Disconnect
L H Z Disconnect
HLB0 - B9Connect
H H Z Disconnect
FUNCTION TABLE(1)
Pins Typ. Max. (1) Unit
Control Inputs 3 4 pF
Quickswitch Channels (Switch OFF) 5 6 p F
CAPA CITANCE (TA = +25°C, f = 1MHz, VIN = 0V, VOUT = 0V)
NOTE:
1. This parameter is guaranteed but not production tested.
Pin Names I/O Description
A0 - A9I / O Bus A
B0 - B9I / O Bus B
BE I Active LOW Bus Enable
B E I Active HIGH Bus Enable
PIN DESCRIPTION
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 conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
2. VCC terminals.
3. All terminals except VCC .
SOIC/ QSOP
TOP VIEW
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
Vcc
B8
B7
A7B6
B5
A5
B0
A0
A1
B1
B2
A2
A3
B3
B4
A4
BE
BE
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IDTQS3R862
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
TYPICAL ON RESIST ANCE vs VIN AT VCC = 5V
RON
(ohms)
VIN
(Volts)
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) 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(2) VCC = Min., VIN = 0V, ION = 30mA — 2.5 5 Ω
VCC = Min., VIN = 2.4V, ION = 15mA — 4 8.5
VPPass Voltage(3) VIN = VCC = 5V, IOUT = -5µA 3.7 4 4.3 V
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5V ± 10%
NOTES:
1. Typical values are at VCC = 5V and TA = 25°C.
2. Max value of RON is guaranteed but not production tested.
3. Pass voltage is guaranteed but not production tested.
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
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INDUSTRIAL TEMPERATURE RANGE
IDTQS3R862
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE BUS SWITCH
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Typical values are at VCC = 5V and TA = 25°C.
3. Per TTL-driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to ∆Icc.
3. This current applies to the control inputs only and represents the current required to switch internal capacitance at the specified frequency. The A and B inputs generate no significant
AC or DC currents as they transition. This parameter is guaranteed but not production tested.
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 Input HIGH(3) VCC = Max., VIN = 3.4V, f = 0 2.5 mA
ICCD Dynamic Power Supply Current per MHz(4) VCC = Max., A and B Pins Open, 0.25 mA/MHz
BE or BE Input Toggling @ 50% Duty Cycle
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5V ± 10%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol Parameter Min. (1) Typ. Max. Unit
tPLH Data Propagation Delay(2) 0.12(3) ns
tPHL A to B, B to A
tPZL Switch Turn-On Delay 1.5 5.6 ns
tPZH BE or BE to A or B
tPLZ Switch Turn-Off Delay(2) 1.5 4.5 ns
tPHZ BE or BE to A or B
NOTES:
1. Minimums are guaranteed but not production tested.
2. This parameter is guaranteed but not production tested.
3. The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone
is of the order of 0.12ns at CL = 50pF. Since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to the
system. Propagation delay of the bus switch, when used in a system, is determined by the driving circuit on the driving side of the switch and its interaction with the load on
the driven side.
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IDTQS3R862
HIGH-SPEED CMOS 10-BIT LOW RESISTANCE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
CORPORATE HEADQUARTERS for SALES: for Tech Support:
2975 Stender Way 800-345-7015 or 408-727-6116 logichelp@idt.com
Santa Clara, CA 95054 fax: 408-492-8674 (408) 654-6459
www.idt.com
IDTQS XXXXX XX
Package
Device Type
Blank Industrial (-40°C to +85°C)
Small Outline IC
Quarter Size Outline Package
SO
Q
3R862 High Speed CMOS 10-Bit Low Resistance Bus Switch
with Active High and Low Enables
X
Process
