M54HC157/158

M74HC157/158

February 1993

HC158 QUAD 2 CHANNEL MULTIPLEXER (INV.)

HC157 QUAD 2 CHANNEL MULTIPLEXER

B1R

(Plastic Package)

ORDER CODES :

M54HCXXXF1R

M74HCXXXM1R

M74HCXXXB1R

M74HCXXXC1R

F1R

(Ceramic Package)

M1R

(Micro Package)

C1R

(Chip Carrier)

PIN CONNECTIONS (top view)

NC =

No Internal

Connection

HC158

HC157

DESCRIPTION

.

HIGH SPEED

.

LOW POWER DISSIPATION

.

HIGH NOISE IMMUNITY

.

OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.

SYMMETRICAL OUTPUT IMPEDANCE

.

BALANCED PROPAGATION DELAYS

.

WIDE OPERATING VOLTAGE RANGE

.

PIN AND FUNCTION COMPATIBLE

WITH 54/74LS157/158

The M54/74HC157 and the M54/74HC158 are high

speed

CMOS

QUAD

2-CHANNEL

MULTI-

PLEXER’s fabricated with silicon gate C

nology. They achieve the high speed operation

similar to equivalent LSTTL while maintaining the

CMOS low power dissipation.

These devices consist of four 2-input digital multi-

plexers with common select and strobe inputs. The

HC158 is an inverting multiplexer while the HC157

is a non-inverting multiplexer. When the STROBE

input is held High, selection of data is inhibited and

all the outputs become Low in the M74HC157 and

High in the M74HC158. The SELECT decoding

determines whether the A or B inputs get routed to

their corresponding Y outputs. All inputs are

equipped with protection circuits against static dis-

charge and transient excess voltage.

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