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IDTQS3257

HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX

INDUSTRIALTEMPERATURERANGE

FEBRUARY 2001

2001 Integrated Device Technology, Inc.

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IDTQS3257

INDUSTRIAL TEMPERATURE RANGE

HIGH-SPEED CMOS

QUICKSWITCH

QUAD 2:1 MUX/DEMUX

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

•5

Ω

Ω

Ω

Ω

Ω bidirectional switches connect inputs to outputs

• Pin compatible with the 74F257, 74FCT257, and 74FCT257T

• Zero propagation delay, zero ground bounce

• Undershoot clamp diodes on all switch and control inputs

• TTL-compatible control inputs

• Available in SOIC, QSOP, and S1 packages

APPLICATIONS:

• Logic replacement

• Video, audio, graphics switching, muxing

• Hot-swapping, hot-docking

• Voltage translation (5V to 3.3V)

• Bus funneling

DESCRIPTION:

The QS3257 is a high-speed CMOS LVTTL-compatible Quad 2:1

multiplexer/demultiplexer. The QS3257 is a function and pinout compatible

QuickSwitch version of the 74F257, 74FCT257, and the 74ALS/AS/LS257

Quad 2:1 multiplexers. The low ON resistance of the QS3257 allows inputs

to be connected to outputs without adding propagation delay and without

generating additional ground bounce noise.

Mux/Demux devices provide an order of magnitude faster speed than

equivalent logic devices.

The QS3257 is characterized for operation at -40°C to +85°C.

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