© 1999 Fairchild Semiconductor Corporation DS009479 www.fairchildsemi.com
April 1988
Revised July 1999
7
4F139 D
u
a
l
1-of
-4 Decoder
/Demult
i
p
l
exer
74F139
Dual 1-of-4 Decoder/Demultiplexer
General Description
The F139 is a high-speed, dual 1-of-4 decoder/demulti-
plexer. 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-out-
put demultiplexer. Each half of the F139 can be used as a
function generator providing all four minterms of two vari-
ables.
Features
a73 Multifunction capability
a73 Two completely independent 1-of-4 decoders
a73 Active LOW mutually exclusive outputs

Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Truth Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Order Number Package Number Package Description
74F139SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74F139SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F139PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs Outputs
E A
0
A
1
O
0
O
1
O
2
O
3
HXXHHHH
LLLLHHH
LHLHLHH
LLHHHLH
LHHHHHL