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IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT INDUSTRIAL TEMPERATURE RANGE
MARCH 2002
2002 Integrated Device Technology, Inc. DSC-5757/2c
INDUSTRIAL TEMPERATURE RANGE
A0
A9
B0
B9
BE
FUNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FEATURES:
• Enhanced N channel FET with no inherent diode to Vcc
• Near zero ground bounce
• Undershoot clamp diodes on all switch and control inputs
• Available in QSOP and SOIC packages
APPLICATIONS:
• Hot-swapping, hot-docking
• Voltage translation (5V to 3.3V)
• Power conservation
• Capacitance reduction and isolation
• Clock gating
• Bus isolation
IDTQS32861
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS
10-BIT BUS SWITCH WITH
FLOW-THROUGH PINOUT
DESCRIPTION:
The QS32861 provides a set of ten high speed CMOS, TTL-compatible
bus switches. The Bus Enable (BE) signal turns the switches on. The
QS32861 includes internal 25Ω series termination resistors to reduce
reflection noise in high speed applications. When closed, the switch acts as
the source (series) termination for the driver connected to it.
The QS32861 is characterized for operation at -40°C to +85°C.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
PIN CONFIGURATION
QSOP/ SOIC
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
NOTE:
1 . H = HIGH Voltage Level
L = LOW Voltage Level
Z = High-Impedance
FUNCTION TABLE(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
ABSOLUTE MAXIMUM RATINGS(1)
NOTE:
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.
CAPACITANCE
(TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
NOTE:
1. This parameter is measured at characterization but not tested.
Pins Typ. Max. (1) Unit
Control Pins 3 5 pF
Quickswitch Channels (Switch OFF) 5 7 p F
PIN DESCRIPTION
Pin Names Description
BE Bus Enable
A0 - A9Bus A
B0 - B9Bus B
BE A0 - A92A, 2Y I/Os
H Hi-Z Disconnect
LB 0 - B9Connect
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IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT INDUSTRIAL TEMPERATURE RANGE
RON
(ohms)
VIN
(Volts)
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
80
70
60
50
40
30
20
10
00.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit
VIH Input HIGH Level Guaranteed Logic HIGH for Control Pins 2 — — V
VIL Input LOW Level Guaranteed Logic LOW for Control Pins — — 0. 8 V
IIN Input LeakageCurrent (Control Inputs)(2) 0V ≤ VIN ≤ VCC —±0.01 ±1µA
IOZ Off-State Output Current (Hi-Z) 0V ≤ VOUT ≤ VCC, Switches OFF — ±0.01 ±1µA
RON(3) Switch ON Resistance VCC = Min., VIN = 0V, ION = 30mA 15 20 35 Ω
VCC = Min., VIN = 2.4V, ION =15mA 18 25 40
VPPass Voltage(2) VIN = VCC = 5V, IOUT = -5µA 3.7 4 4.2 V
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%
NOTES:
1. Typical values are at VCC = 5.0V, TA = 25°C.
2. Pass Voltage is guaranteed but not production tested.
3. ROUT changed on March 8, 2002. See rear page for more information.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT
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 — 0.25 mA/MHz
BE Input Toggling at 50% Duty Cycle
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Typical values are at VCC = 5.0V, 25°C ambient.
3. Per TLL driven input (VIN = 3.4V, control inputs only). A and B pins do not contribute to ∆Icc.
4. 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 pins generate no significant
AC or DC currents as they transition. This parameter is guaranteed but not production 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 Data Propagation Delay (2,4) — — 1.25(3) ns
tPHL A to B or B to A
tPZH Switch Turn-on Delay 1.5 — 7.5 ns
tPZL BE to A or B
tPHZ Switch Turn-off Delay (2) 1.5 — 5.5 ns
tPLZ 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 time constant for the switch alone is of the order of 1.25ns for CL = 50pF.
4 . The bus switch contributes no propagation delay other than the RC delay of the ON resistance of the switch and the load capacitance. 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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IDTQS32861
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH FLOW-THROUGH PINOUT INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX XX
Package
Device T ype
Blank Industrial (-40°C to +85°C)
Small Out line IC
Quarter- Size Outline Package
SO
Q
32861 High Speed CMOS 10-Bit Bus Switch with
Flow-Throu
g
h Pinout
X
Process
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
Parameter Description Min. Typ. Max. Unit
RON VCC = Min, VIN = 0V, ION = 30mA 20 28 40 Ω
VCC = Min, VIN = 2.4V, ION = 15mA 20 35 48
As per PCN L0201-02, the Output Resistance (RON) specifications have changed as of March 8, 2002. The original specifications were:
