1/10July 2001
■ HIGH SPEED:
t
PD
= 15ns (TYP.) at V
CC
= 6V
■ LOW POWER DISSIPATION:
I
CC
= 4µA(MAX.) at T
A
=25°C
■ HIGH NOISE IMMUNITY:
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 4mA (MIN)
■ BALANCED PROPAGATION DELAYS:
t
PLH
≅ t
PHL
■ WIDE OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 6V
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 238
DESCRIPTION
The M74HC238 is an high speed CMOS 3 TO 8
LINE DECODER fabricated with silicon gate
C
2
MOS technology.
If the device is enabled, 3 binary select inputs (A,
B and C) determine which one of outputs will go
high. When enable input G1 is held "Low" or either
G2A
or G2B is held "High" decoding function is
inhibited and all the 8 outputs 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.
M74HC238
3 TO 8 LINE DECODER
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE TUBE T & R
DIP M74HC238B1R
SOP M74HC238M1R M74HC238RM13TR
TSSOP M74HC238TTR
TSSOPDIP SOP
