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 . . . -55oC to 125oC

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30%of VCC at

VCC = 5V

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH

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

1I0

1I1

1Y

2I0

2I1

GND

2Y

VCC

4I0

4I1

4Y

3I0

3I1

3Y

E

Ordering Information

PART NUMBER

TEMP. RANGE

(oC)

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

C157,

CD74H

CT157,

CD74H

C158,

CD74H

CT158)

/Subject

(High

Speed