Datasheet

1
Data sheet acquired from Harris Semiconductor
SCHS153C
The CD54HC158 and
CD74HC158 are obsolete and
no longer are supplied.
Features
• Common Select Inputs
• Separate Enable Inputs
• Buffered inputs and Outputs
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55
o
C to 125
o
C
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N
IL
= 30%, N
IH
= 30%of V
CC
at
V
CC
= 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V
IL
= 0.8V (Max), V
IH
= 2V (Min)
- CMOS Input Compatibility, I
l
≤ 1µA at V
OL
, V
OH
Pinout
CD54HC157, CD54HCT157, CD54HC158, CD54HCT158
(CERDIP)
CD74HC157, CD74HCT157, CD74HC158
(PDIP, SOIC)
CD74HCT158
(PDIP)
TOP VIEW
Description
The ’HC157, ’HCT157, ’HC158, and ’HCT158 are quad 2-
input multiplexers which select four bits of data from two
sources under the control of a common Select input (S). The
Enable input (
E) is active Low. When (E) is High, all of the
outputs in the 158, the inverting type, (
1Y-4Y) are forced
High and in the 157, the non-inverting type, all of the outputs
(
1Y-4Y) are forced Low, regardless of all other input
conditions.
Moving data from two groups of registers to four common
output buses is a common use of these devices. The state of
the Select input determines the particular register from
which the data comes. They can also be used as function
generators.
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
S
1I
0
1I
1
1Y
2I
0
2I
1
GND
2Y
V
CC
4I
0
4I
1
4Y
3I
0
3I
1
3Y
E
Ordering Information
PART NUMBER
TEMP. RANGE
(
o
C) PACKAGE
CD54HC157F3A -55 to 125 16 Ld CERDIP
CD54HCT157F3A -55 to 125 16 Ld CERDIP
CD54HCT158F3A -55 to 125 16 Ld CERDIP
CD74HC157E -55 to 125 16 Ld PDIP
CD74HC157M -55 to 125 16 Ld SOIC
CD74HC157MT -55 to 125 16 Ld SOIC
CD74HC157M96 -55 to 125 16 Ld SOIC
CD74HCT157E -55 to 125 16 Ld PDIP
CD74HCT157M -55 to 125 16 Ld SOIC
CD74HCT157MT -55 to 125 16 Ld SOIC
CD74HCT157M96 -55 to 125 16 Ld SOIC
CD74HCT158E -55 to 125 16 Ld PDIP
NOTE: When ordering, use the entire part number. The suffix 96
denotes tape and reel. The suffix T denotes a small-quantity reel of
250.
September 1997 - Revised October 2003
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© 2003, Texas Instruments Incorporated
CD54/74HC157, CD54/74HCT157,
CD54/74HC158, CD54/74HCT158
High-Speed CMOS Logic
Quad 2-Input Multiplexers
[
/Title
(
CD74H
C
157,
C
D74H
C
T157,
C
D74H
C
158,
C
D74H
C
T158)
/
Subject
(
High
S
peed