MILITARYANDINDUSTRIALTEMPERATURERANGES

IDT54/74FCT257T/AT/CT/DT

FASTCMOSQUAD2-INPUTMULTIPLEXER

1

JUNE 2001

MILITARY AND INDUSTRIAL TEMPERATURE RANGES

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

© 2002 Integrated Device Technology, Inc.

DSC-5500/2

FEATURES:

• Std., A, C, and D grades

• Low input and output leakage

≤≤≤≤≤1µA (max.)

• CMOS power levels

• True TTL input and output compatibility:

• Meets or exceeds JEDEC standard 18 specifications

• Military product compliant to MIL-STD-883, Class B and DESC

listed (dual marked)

• Power off disable outputs permit "live insertion"

• Available in the following packages:

– Industrial: SOIC, QSOP

– Military: CERDIP, LCC

FUNCTIONAL BLOCK DIAGRAM

IDT54/74FCT257T/AT/CT/DT

FAST CMOS

QUAD 2-INPUT

MULTIPLEXER

DESCRIPTION:

The FCT257T is a high-speed quad 2-input multiplexer built using an

advanced dual metal CMOS technology. Four bits of data from two sources

can be selected using the common select input. The four buffered outputs

present the selected data in the true (non-inverting) form.

The FCT257T has a common Output Enable (OE) input. When OE is

high,alloutputsareswitchedtoahigh-impedancestateallowingtheoutputs

to interface directly with bus-oriented systems.

Three other multiplexers

OE

S