CD54HCT258, CD74HCT258
QUADRUPLE 2-LINE TO 1-LINE SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS

SCHS276A – MAY 2003
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C0068 4.5-V to 5.5-V V
CC
Operation
C0068 Wide Operating Temperature Range of
–55°C to 125°C
C0068 Balanced Propagation Delays and
Transition Times
C0068 Standard Outputs Drive Up To 10 LS-TTL
Loads
C0068 Significant Power Reduction Compared to
LS-TTL Logic ICs
C0068 Inputs Are TTL-Voltage Compatible
description/ordering information
These devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized
systems. The 3-state outputs do not load the data lines when the output-enable (G) input is at a high logic level.
To ensure the high-impedance state during power up or power down, G should be tied to V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
55°Cto125°C
PDIP – E Tube CD74HCT258E CD74HCT258E
– C to 125
CDIP – F Tube CD54HCT258F3A CD54HCT258F3A
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OUTPUT
G A/B A B
Y
H X X X Z
L LLX H
L LHX L
L HXL H
L H X H L
Copyright  2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
CD54HCT258 ...F PACKAGE
CD74HCT258 ...E PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A/B
1A
1B
1Y
2A
2B
2Y
GND
V
CC
G
4A
4B
4Y
3A
3B
3Y
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.