IN74ACT258
Q
UAD
2-I
NPUT
D
ATA
S
ELECTOR
/M
ULTIPLEXER
WITH
3-S
TATE
O
UTPUTS
High-Speed Silicon-Gate CMOS
The IN74ACT258 is identical in pinout to the LS/ALS258,
HC/HCT258. The IN74ACT258 may be used as a level converter
for interfacing TTL or NMOS outputs to High Speed CMOS
inputs.
This device selects a (4-bit) nibble from either the A or B
inputs as determined by the Select input. The nibble is presented
at the outputs in inverted from when the Output Enable pin is at a
low level. A high level on the Output Enable pin switches the
outputs into the high-impedance state.
•
TTL/NMOS Compatible Input Levels
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 4.5 to 5.5 V
Low Input Current: 1.0
µA;
0.1
µA
@ 25°C
Outputs Source/Sink 24 mA
•
•
•
•
ORDERING INFORMATION
IN74ACT258N Plastic
IN74ACT258D SOIC
T
A
= -40° to 85° C for all
packages
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 16 =V
CC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
Output
Select
Y0-Y3
Enable
H
X
Z
L
L
A0-A3
L
H
B0-B3
X=don’t
care
Z
=
high-impedance
state
A0-A3,B0-B3=the levels of the
respective Nibble Inputs
1
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