November 1988
Revised November 1999
74AC139 • 74ACT139
Dual 1-of-4 Decoder/Demultiplexer
General Description
Features
The AC/ACT139 is a high-speed, dual 1-of-4 decoder/
demultiplexer. The device has two independent decoders,
each accepting two inputs and providing four mutually-
exclusive active-LOW outputs. Each decoder has an
active-LOW Enable input which can be used as a data
input for a 4-output demultiplexer. Each half of the AC/
ACT139 can be used as a function generator providing all
four minterms of two variables.
■ ICC reduced by 50%
■ Multifunction capability
■ Two completely independent 1-of-4 decoders
■ Active LOW mutually exclusive outputs
■ Outputs source/sink 24 mA
■ ACT139 has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74AC139SC
74AC139SJ
M16A
M16D
MTC16
N16E
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
16-Lead Small Outline Package (SOIC), EIAJ Type II, 5.3mm Wide
74AC139MTC
74AC139PC
74ACT139SC
74ACT139SJ
74ACT139MTC
74ACT139PC
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
16-Lead Small Outline Package (SOIC), EIAJ Type II, 5.3mm Wide
M16A
M16D
MTC16
N16E
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
A0, A1
Description
Address Inputs
Enable Inputs
Outputs
E
O0–O3
FACT is a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation
DS009926
www.fairchildsemi.com