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National Semiconductor Electronic Components Datasheet

74F139 Datasheet

Dual 1-of-4 Decoder/Demultiplexer

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74F139 pdf
November 1994
54F 74F139
Dual 1-of-4 Decoder Demultiplexer
General Description
The ’F139 is a high-speed dual 1-of-4 decoder demultiplex-
er The device has two independent decoders each accept-
ing two inputs and providing four mutually exclusive active
LOW outputs Each decoder has an active LOW Enable in-
put which can be used as a data input for a 4-output demul-
tiplexer Each half of the ’F139 can be used as a function
generator providing all four minterms of two variables
Features
Y Multifunction capability
Y Two completely independent 1-of-4 decoders
Y Active LOW mutually exclusive outputs
Y Guaranteed 4000V minimum ESD protection
Commercial
74F139PC
74F139SC (Note 1)
74F139SJ (Note 1)
Military
54F139DM (Note 2)
54F139FM (Note 2)
54F139LM (Note 2)
Package
Number
N16E
J16A
M16A
M16D
W16A
E20A
Package Description
16-Lead (0 300 Wide) Molded Dual-In-Line
16-Lead Ceramic Dual-In-Line
16-Lead (0 150 Wide) Molded Small Outline JEDEC
16-Lead (0 300 Wide) Molded Small Outline EIAJ
16-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
Note 1 Devices also available in 13 reel Use suffix e SCX and SJX
Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB
Logic Symbols
Connection Diagrams
Pin Assignment
DIP SOIC and Flatpak
TL F 9479–3
IEEE IEC
TL F 9479–4
TL F 9479 – 1
Pin Assignment
for LCC
TL F 9479–7
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 9479
TL F 9479 – 2
RRD-B30M75 Printed in U S A


National Semiconductor Electronic Components Datasheet

74F139 Datasheet

Dual 1-of-4 Decoder/Demultiplexer

No Preview Available !

74F139 pdf
Unit Loading Fan Out
Pin Names
Description
A0 A1
E
O0 – O3
Address Inputs
Enable Inputs (Active LOW)
Outputs (Active LOW)
54F 74F
UL
HIGH LOW
10 10
10 10
50 33 3
Input IIH IIL
Output IOH IOL
20 mA b0 6 mA
20 mA b0 6 mA
b1 mA 20 mA
Functional Description
The ’F139 is a high-speed dual 1-of-4 decoder demultiplex-
er The device has two independent decoders each of
which accepts two binary weighted inputs (A0 – A1) and pro-
vides four mutually exclusive active LOW Outputs (O0 – O3)
Each decoder has an active LOW enable (E) When E is
HIGH all outputs are forced HIGH The enable can be used
as the data input for a 4-output demultiplexer application
Each half of the ’F139 generates all four minterms of two
variables These four minterms are useful in some applica-
tions replacing multiple gate functions as shown in Figure 1
and thereby reducing the number of packages required in a
logic network
Truth Table
Inputs
Outputs
E A0 A1 O0 O1 O2 O3
HX X H H H H
LL L L H H H
LH L H L H H
LL H H H L H
LH H H H H L
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
Logic Diagram
TL F 9479 – 6
FIGURE 1 Gate Functions (each half)
TL F 9479 – 5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
2


Part Number 74F139
Description Dual 1-of-4 Decoder/Demultiplexer
Maker National Semiconductor
Total Page 8 Pages
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