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April 2001

s

s

LOW POWER DISSIPATION:

s

HIGH NOISE IMMUNITY:

s

50

Ω TRANSMISSION LINE DRIVING

CAPABILITY

s

SYMMETRICAL OUTPUT IMPEDANCE:

s

BALANCED PROPAGATION DELAYS:

s

OPERATING VOLTAGE RANGE:

s

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 157

s

IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

The 74AC157 is an advanced high-speed CMOS

QUAD 2-CHANNEL MULTIPLEXER fabricated

with sub-micron silicon gate and double-layer

It consists of four 2-input digital multiplexer with

common SELECT and STROBE inputs. It is a

non-inverting multiplexer. When the STROBE

input is held high selection of data is inhibit and all

the outputs become low. The SELECT decoding

determines whether the A or B inputs get routed to

their corresponding Y outputs.

All

inputs

and

outputs

are

equipped

with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

74AC157

QUAD 2 CHANNEL MULTIPLEXER

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE

TUBE

T & R

DIP

74AC157B

SOP

74AC157M

74AC157MTR

TSSOP

74AC157TTR

TSSOP

DIP

SOP