M54HC238

M74HC238

October 1993

3 TO 8 LINE DECODER

B1R

(Plastic Package)

ORDER CODES :

M54HC238F1R

M74HC238M1R

M74HC238B1R

M74HC238C1R

F1R

(Ceramic Package)

M1R

(Micro Package)

C1R

(Chip Carrier)

PIN CONNECTIONS (top view)

NC =

No Internal

Connection

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 54/74LS238

The M54/74HC238 is a high speed CMOS 3 to 8 line

decoder fabricated in silicon gate C

It has the same high speed performance of LSTTL

combined with true CMOS low power consumption. If

the device is enabled, 3 binary select inputs (A, B and

C) determine which one of outputs will go high. Enable

input G1 is held ”Low” or either G2A or G2B is held

”High” decoding function is inhibited and all the 8 out-

puts go low. Three enable inputs are provided to ease

cascade connection and application of this address

decoder in memory systems.

All inputs are equipped with protection circuits against

static discharge and transient excess voltage.

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