© 2000 Fairchild Semiconductor Corporation

DS006470

www.fairchildsemi.com

August 1986

Revised April 2000

DM74S157 • DM74S158

Quad 1 of 2 Line Data Selector/Multiplexer

General Description

These data selectors/multiplexers contain inverters and

drivers to supply full on-chip data selection to the four out-

put gates. A separate strobe input is provided. A 4-bit word

is selected from one of two sources and is routed to the

four outputs. The DM74S157 presents true data whereas

the DM74S158 presents inverted data to minimize propa-

gation delay time.

Applications

• Expand any data input point

• Multiplex dual data buses

• Generate four functions of two variables (one variable is

common)

• Source programmable counters

Features

s Buffered inputs and outputs

s Typical propagation time

DM74S157

5 ns

DM74S158

4 ns

s Typical power dissipation

DM74S157

250 mW

DM74S158

195 mW

Ordering Code:

Connection Diagrams

DM74S157

DM74S158

Order Number

Package Number

Package Description

DM74S157N

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

DM74S158N

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide