tm

May 2007

©1992 Fairchild Semiconductor Corporation

www.fairchildsemi.com

74VHC157 Rev. 1.2

74VHC157

Quad 2-Input Multiplexer

Features

General Description

The VHC157 is an advanced high speed CMOS Quad

2-Channel Multiplexer fabricated with silicon gate CMOS

technology. It achieves the high speed operation similar

to equivalent Bipolar Schottky TTL while maintaining the

CMOS low power dissipation.

It consists of four 2-input digital multiplexers with com-

mon select and enable inputs. When the ENABLE input

is held “H” level, selection of data is inhibited and all the

outputs become “L” level. The SELECT decoding deter-

responding outputs.

An Input protection circuit ensures that 0V to 7V can be

applied to the input pins without regard to the supply

voltage. This device can be used to interface 5V to 3V

systems and on two supply systems such as battery

back up. This circuit prevents device destruction due to

mismatched supply and input voltages.

Ordering Information

Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the

ordering number.

Connection Diagram

Pin Description

Order Number

Package

Number

Package Description

74VHC157M

M16A

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150”

Narrow

74VHC157SJ

M16D

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74VHC157MTC

MTC16

16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153,

4.4mm Wide

Pin Names

Description

Source 0 Data Inputs

Source 1 Data Inputs

E

Enable Input

S

Select Input

Outputs