© Semiconductor Components Industries, LLC, 2006
March, 2006 − Rev. 7
1 Publication Order Number:
MC74AC139/D
MC74AC139, MC74ACT139
Dual 1−of−4
Decoder/Demultiplexer
The MC74AC139/74ACT139 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 MC74AC139/74ACT139 can be used as a function
generator providing four minterms of two variables.
• Multifunctional Capability
• Two Completely Independent 1−of−4 Decoders
• Active LOW Mutually Exclusive Outputs
• Outputs Source/Sink 24 mA
• ′ACT139 Has TTL Compatible Inputs
w These devices are available in Pb−free package(s). Specifications herein
apply to both standard and Pb−free devices. Please see our website at
www.onsemi.com for specific Pb−free orderable part numbers, or
contact your local ON Semiconductor sales office or representative.
1516 14 13 12 11 10
21 34567
V
CC
9
8
E
b
A
0b
A
1b
E
a
GND
O
0b
O
1b
O
2b
O
3b
A
0a
A
1a
O
0a
O
1a
O
2a
O
3a
Figure 1. Pinout: 16−Lead Packages Conductors
(Top View)
PIN ASSIGNMENT
PIN FUNCTION
A
0
, A
1
Address Inputs
E Enable Inputs
O
0
−O
3
Outputs
TRUTH TABLE
Inputs Outputs
E A
0
A
1
O
0
O
1
O
2
O
3
H X X H H H H
L L L L H H H
L H L H L H H
L L H H H L H
L H H H H H L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
http://onsemi.com
DIP−16
N SUFFIX
CASE 648
1
16
SO−16
D SUFFIX
CASE 751B
1
16
Device Package Shipping
ORDERING INFORMATION
MC74AC139N
PDIP−16
25 Units/Rail
MC74AC139D
SOIC−16
48 Units/Rail
MC74AC139DR2 2500 Tape & Reel
TSSOP−16
DT SUFFIX
CASE 948F
MC74AC139DT
TSSOP−16
96 Units/Rail
MC74AC139DTR2
TSSOP−16
SOIC−16
2500 Tape & Reel
MC74ACT139N
PDIP−16
25 Units/Rail
MC74ACT139D
SOIC−16
48 Units/Rail
MC74ACT139DR2 2500 Tape & Reel
MC74ACT139DT
TSSOP−16
96 Units/Rail
SOIC−16
1
16
See general marking information in the device marking
section on page 6 of this data sheet.
DEVICE MARKING INFORMATION
1
16
EIAJ−16
M SUFFIX
CASE 966
MC74AC139M
EIAJ−16
MC74AC139MEL
EIAJ−16
2000 Tape & Reel
MC74ACT139M
EIAJ−16
MC74ACT139MEL
EIAJ−16
2000 Tape & Reel
50 Units/Rail
50 Units/Rail