1/10

April 2001

s

s

LOW POWER DISSIPATION:

s

COMPATIBLE WITH TTL OUTPUTS

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 74ACT157 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.

The device is designed to interface directly High

Speed CMOS systems with TTL, NMOS and

CMOS output voltage levels.

All

inputs

and

outputs

are

equipped

with

protection circuits against static discharge, giving

them 2KV ESD immunity and transient excess

voltage.

74ACT157

QUAD 2 CHANNEL MULTIPLEXER

PIN CONNECTION AND IEC LOGIC SYMBOLS

ORDER CODES

PACKAGE

TUBE

T & R

DIP

74ACT157B

SOP

74ACT157M

74ACT157MTR

TSSOP

74ACT157TTR

TSSOP

DIP

SOP