Fairchild Semiconductor MM74C154N, MM74C154WM, MM74C154WMX Datasheet

October 1987
Revised January 1999

MM74C154 4-Line to 16-Line Decoder/Demultiplexer

© 1999 Fairchild Semiconductor Corporation DS005893.prf www.fairchildsemi.com

MM74C154
4-Line to 16-Line Decoder/Demultiplexer

General Description

The MM74C154 one of sixteen decoder is a monolithic
complementary MOS (CMOS) integrated circuit con­structed with N- and P-channe l enhancement transistors.
The device is provided with two strobe inputs, both of

which must be in th e logica l “0 ” state for nor ma l operatio n.
If either strobe input is in the logical “1” state, all 16 outputs
will go to the logical “1” state.

To use the product as a demulti plexer, one of the strobe
inputs serves as a data input terminal, while the other
strobe input must be maintained in the logical “0” state. The
information will then be transmitted to the selected output
as determined by the 4-line input address.

Features

■ Supply voltage range: 3V to 15V

■ Tenth power TTL compatible: Drive 2 LPTTL loads

■ High noise margin: 1V guaranteed

■ High noise immunity: 0.45 V

CC

(typ.)

Applications

• Automotive

• Data terminals

• Instrumentation

• Medical electronics

• Alarm systems

• Industrial electronics

• Remote metering

• Computers

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Pin Assignments for DIP and SOIC

Top View

Order Number Package Number Package Description

MM74C154WM M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
MM74C154N N24A 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.600” Wide

www.fairchildsemi.com 2

MM74C154

Logic Diagram

Truth Table

X = “Don't Care” Conditi on

Inputs Outputs

G1G2DCBA0123456789101112131415

L L LL LL LHHHHHHHHH H H H H H H
L L LL LHHLHHHHHHHH H H H H H H
L L LLHLHHLHHHHHHH H H H H H H
L L LLHHHHHLHHHHHH H H H H H H
L L LHL LHHHHLHHHHH H H H H H H
L L LHLHHHHHHLHHHH H H H H H H
L L LHHLHHHHHHLHHH H H H H H H
L L LHHHHHHHHHHLHH H H H H H H
L L HL LLHHHHHHHHLH H H H H H H
L L HL LHHHHHHHHHHL H H H H H H
L L HLHLHHHHHHHHHH L H H H H H
L L HLHHHHHHHHHHHH H L H H H H
L L HHL LHHHHHHHHHH H H L H H H
L L HHLHHHHHHHHHHH H H H L H H
L L HHHLHHHHHHHHHH H H H H L H
L L HHHHHHHHHHHHHH H H H H H L
L H XXXXHHHHHHHHHH H H H H H H
H L XXXXHHHHHHHHHH H H H H H H
H H XXXXHHHHHHHHHH H H H H H H