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DESCRIPTION/ORDERING INFORMATION

DESCRIPTION/ORDERING INFORMATION (CONTINUED)

SN74CB3Q16811

24-BIT SWITCH WITH PRECHARGED OUTPUTS

2.5-V/3.3-V LOW-VOLTAGE FET BUS SWITCH

SCDS153B – OCTOBER 2003 – REVISED MARCH 2005

•

Data and Control Inputs Provide Undershoot

Clamp Diodes

•

Member of the Texas Instruments Widebus™

Family

•

Low Power Consumption (I

•

SN74CB3Q Bus Switches Are Equivalent to

•

V

IDTQS3VH Bus Switches

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

•

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

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

Powered Down

•

Control Inputs Can Be Driven by TTL or

•

Low and Flat ON-State Resistance (r

5-V/3.3-V CMOS Outputs

Characteristics Over Operating Range

•

I

(r

Operation

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

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Latch-Up Performance Exceeds 100 mA Per

– 0- to 5-V Switching With 3.3-V V

CC

JESD 78, Class II

– 0- to 3.3-V Switching With 2.5-V V

CC

•

ESD Performance Tested Per JESD 22

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B-Port Outputs Are Precharged by Bias

– 2000-V Human-Body Model

Voltage (BIASV) to Minimize Signal Distortion

(A114-B, Class II)

During Live Insertion and Hot Plugging

– 1000-V Charged-Device Model (C101)

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Supports PCI Hot Plug

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Supports Both Digital and Analog

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Bidirectional Data Flow With Near-Zero

Applications: PCI Hot Plug, Hot Docking,

Propagation Delay

Memory Interleaving, Bus Isolation, and

Low-Distortion Signal Gating

•

Low Input/Output Capacitance Minimizes

Loading and Signal Distortion

(C

•

Fast Switching Frequency (f

The SN74CB3Q16811 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 SN74CB3Q16811 provides an optimized

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

systems.

ORDERING INFORMATION

ORDERABLE PART NUMBER

TOP-SIDE MARKING

Tube

SN74CB3Q16811DL

SSOP – DL

CB3Q16811

Tape and reel

SN74CB3Q16811DLR

–40°C to 85°C

TSSOP – DGG

Tape and reel

SN74CB3Q16811DGGR

CB3Q16811

TVSOP – DGV

Tape and reel

SN74CB3Q16811DGVR

BW811

(1)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

The SN74CB3Q16811 is organized as two 12-bit bus switches with separate output-enable (1OE, 2OE) inputs. It

can be used as two 12-bit bus switches or as one 24-bit bus switch. When OE is low, the associated 12-bit bus

switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE

is high, the associated 12-bit bus switch is OFF, and a high-impedance state exists between the A and B ports.

The B port is precharged to bias voltage (BIASV) through the equivalent of a 10-k

Ω resistor when OE is high or if

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.

Widebus is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2003–2005, 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.