© 2000 Fairchild Semiconductor Corporation

DS006396

www.fairchildsemi.com

September 1986

Revised April 2000

DM74LS157 • DM74LS158

Quad 2-Line to 1-Line Data Selectors/Multiplexers

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 DM74LS157 presents true data whereas

the DM74LS158 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

DM74LS157

9 ns

DM74LS158

7 ns

s Typical Power Dissipation

DM74LS157

49 mW

DM74LS158

24 mW

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagrams

DM74LS157

DM74LS158

Order Number

Package Number

Package Description

DM74LS157M

M16A

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

DM74LS157SJ

M16D

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

DM74LS157N

N16E

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

DM74LS158M

M16A

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

DM74LS158N

N16E

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