54AC258 • 54ACT258
Quad 2-Input Multiplexer with TRI-STATE
®
Outputs
General Description
The ’AC/’ACT258 is a quad 2-input multiplexer with
TRI-STATE outputs. Four bits of data from two sources can
be selected using a common data select input. The four out-
puts present the selected data in the complement (inverted)
form. The outputs may be switched to a high impedance
state with a HIGH on the common Output Enable (OE) input,
allowing the outputs to interface directly with bus-oriented
systems.
Features
n I
CC
and I
OZ
reduced by 50%
n Multiplexer expansion by tying outputs together
n Inverting TRI-STATE outputs
n Outputs source/sink 24 mA
n ’ACT258 has TTL-compatible inputs
n Standard Military Drawing (SMD)
— ’ACT258: 5962-88704
— ’AC258: 5962-91604
Logic Symbols
Pin Names Description
S Common Data Select Input
OE TRI-STATE Output Enable Input
I
0a
–I
0d
Data Inputs from Source 0
I
1a
–I
1d
Data Inputs from Source 1
Z
a
–Z
d
TRI-STATE Inverting Data Outputs
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
DS100287-1
IEEE/IEC
DS100287-2
August 1998
54AC258
•
54ACT258
Quad
2-Input
Multiplexer
with
TRI-ST
A
T
E
Outputs
© 1998 National Semiconductor Corporation DS100287 www.national.com