MC74ACT139DG Просмотр технического описания (PDF) - ON Semiconductor
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MC74ACT139DG Datasheet PDF : 9 Pages
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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.
Features
• Multifunctional Capability
• Two Completely Independent 1−of−4 Decoders
• Active LOW Mutually Exclusive Outputs
• Outputs Source/Sink 24 mA
• ′ACT139 Has TTL Compatible Inputs
• These are Pb−Free Devices
VCC Eb A0b A1b O0b O1b O2b O3b
16 15 14 13 12 11 10 9
12345678
Ea A0a A1a O0a O1a O2a O3a GND
Figure 1. Pinout: 16−Lead Packages Conductors
(Top View)
PIN ASSIGNMENT
PIN
FUNCTION
A0, A1
E
Address Inputs
Enable Inputs
O0−O3
Outputs
TRUTH TABLE
Inputs
Outputs
E A0 A1 O0 O1 O2
O3
HXX H H H
H
LLL
L
H
H
H
LHL H L H
H
LLH H H L
H
LHH H H H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
www.onsemi.com
16
1
16
1
MARKING
DIAGRAMS
16
SOIC−16
D SUFFIX
CASE 751B
1
xxx139G
AWLYWW
TSSOP−16
DT SUFFIX
CASE 948F
16
xxx
139
ALYWG
G
1
xxx
= AC or ACT
A
= Assembly Location
WL or L = Wafer Lot
Y
= Year
WW or W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
1
January, 2015 − Rev. 8
Publication Order Number:
MC74AC139/D
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