SL74LS157

System Logic

Semiconductor

SLS

Quad 2-Input Data Selector/Multiplexer

This monolitic data selector/multiplexer contains inverters and

drivers to supply full on-chip data selection to the four o utput 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 LS157 has the same

functions and pin connections as the LS257 but the latter is provided

with 3-state outputs.

• Buffered Inputs and Outputs

• Common Strobe/Select input for all 4 circuits

ORDERING INFORMATION

SL74LS157N Plastic

SL74LS157D SOIC

° to 70° C for all

packages

FUNCTION TABLE

Inputs

Outputs

Output

Enable

Select

Y0-Y3

H

X

L

L

L

A0-A3

L

H

B0-B3

X=don’t care

A0-A3,B0-B3=the levels of the respective

Data-Word Inputs

LOGIC DIAGRAM

PIN 8 = GND

PIN ASSIGNMENT