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FEATURES

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DBQ, DGV, OR PW PACKAGE

(TOP VIEW)

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DESCRIPTION/ORDERING INFORMATION

SN74CB3Q3251

1-OF-8 FET MULTIPLEXER/DEMULTIPLEXER

2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH

SCDS173A – AUGUST 2004 – REVISED MARCH 2005

•

Data and Control Inputs Provide Undershoot

Clamp Diodes

•

•

Low Power Consumption (I

•

Equivalent to IDTQS3VH251 Device

•

V

•

5-V Tolerant I/Os With Device Powered Up or

Powered Down

•

Data I/Os Support 0- to 5-V Signaling Levels

(0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)

•

Low and Flat ON-State Resistance (r

Characteristics Over Operating Range

•

Control Inputs Can Be Driven by TTL or

(r

5-V/3.3-V CMOS Outputs

•

Rail-to-Rail Switching on Data I/O Ports

•

I

Operation

– 0- to 5-V Switching With 3.3-V V

CC

•

Latch-Up Performance Exceeds 100 mA Per

– 0- to 3.3-V Switching With 2.5-V V

CC

JESD 78, Class II

•

Bidirectional Data Flow With Near-Zero

•

ESD Performance Tested Per JESD 22

Propagation Delay

– 2000-V Human-Body Model (A114-B,

•

Low Input/Output Capacitance Minimizes

Class II)

Loading and Signal Distortion

(C

– 1000-V Charged-Device Model (C101)

•

Fast Switching Frequency

•

Supports Both Digital and Analog

(f

Applications: PCI Interface, Differential Signal

Interface, Memory Interleaving, Bus Isolation,

(1)

For additional information regarding the performance

characteristics of the CB3Q family, refer to the TI application

Low-Distortion Signal Gating

report, CBT-C, CB3T, and CB3Q Signal-Switch Families,

literature number SCDA008.

The SN74CB3Q3251 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of

for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device

also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus.

Specifically designed to support high-bandwidth applications, the SN74CB3Q3251 provides an optimized

interface solution ideally suited for broadband communications, networking, and data-intensive computing

systems.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2005, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.