© Semiconductor Components Industries, LLC, 1999

December, 1999 – Rev. 0

110

Publication Order Number:

SN74LS156/D

SN74LS156

Dual 1-of-4 Decoder/

Demultiplexer

The SN74LS156 is a high speed Dual 1-of-4 Decoder/

Demultiplexer. This device has two decoders with common 2-bit

Address inputs and separate gated Enable inputs. Decoder “a” has an

Enable gate with one active HIGH and one active LOW input.

Decoder “b” has two active LOW Enable inputs. If the Enable

functions are satisfied, one output of each decoder will be LOW as

selected by the address inputs. The LS156 has open collector outputs

for wired-OR (DOT-AND) decoding and function generator

applications.

The LS156 is fabricated with the Schottky barrier diode process for

high speed and are completely compatible with all ON Semiconductor

TTL families.

GUARANTEED OPERATING RANGES

Symbol

Parameter

Min

Typ

Max

Unit

Supply Voltage

4.75

5.0

5.25

V

Operating Ambient

Temperature Range

0

25

70

°C

Output Voltage – High

5.5

V

Output Current – Low

8.0

mA

LS156–OPEN–COLLECTOR

LOW POWER SCHOTTKY

Device

Package

Shipping

ORDERING INFORMATION

SN74LS156N

16 Pin DIP

2000 Units/Box

SN74LS156D

16 Pin

SOIC

D SUFFIX

CASE 751B

http://onsemi.com

2500/Tape & Reel

PLASTIC

N SUFFIX

CASE 648

16

1

16

1