Description

74LS157 – 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 output 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 propagation 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
■ Buffered inputs and outputs
■ Typical Propagation Time
DM74LS157 9 ns
DM74LS158 7 ns
■ Typical Power Dissipation
DM74LS157 49 mW
DM74LS158 24 mW