54AC253 • 54ACT253
Dual 4-Input Multiplexer with TRI-STATE
®
Outputs
General Description
The ’AC/’ACT253 is a dual 4-input multiplexer with
TRI-STATE outputs. It can select two bits of data from four
sources using common select inputs. The outputs may be in-
dividually switched to a high impedance state with a HIGH
on the respective Output Enable (OE) inputs, allowing the
outputs to interface directly with bus oriented systems.
Features
n I
CC
and I
OZ
reduced by 50%
n Multifunction capability
n Noninverting TRI-STATE outputs
n Outputs source/sink 24 mA
n ’ACT253 has TTL-compatible inputs
n Standard Military Drawing (SMD)
— ’AC253: 5962-87693
— ’ACT253: 5962-87761
Logic Diagrams
Pin Names Description
I
0a
–I
3a
Side A Data Inputs
I
0b
–I
3b
Side B Data Inputs
S
0
,S
1
Common Select Inputs
OE
a
Side A Output Enable Input
OE
b
Side B Output Enable Input
Z
a
,Z
b
TRI-STATE Outputs
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
DS100285-1
IEEE/IEC
DS100285-2
August 1998
54AC253
•
54ACT253
Dual
4-Input
Multiplexer
with
TRI-ST
A
T
E
Outputs
© 1998 National Semiconductor Corporation DS100285 www.national.com