ETC HD74AC139/HA74ACT139

HD74AC139/HD74ACT139
Dual 1-of-4 Decoder/Demultiplexer
ADE-205-369 (Z)
1st. Edition
Sep. 2000
Description
The HD74AC139/HD74ACT139 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 HD74AC139/HD74ACT139 can be used as a function generator providing
all four minterms of two variables.
Features
•
•
•
•
•
Multifunction Capability
Two Completely Independent 1-of-4 Decoders
Active Low Mutually Exclusive Outputs
Outputs Source/Sink 24 mA
HD74ACT139 has TTL-Compatible Inputs
HD74AC139/HD74ACT139
Pin Arrangement
Ea 1
16 VCC
A0a 2
15 Eb
A1a 3
14 A0b
O0a 4
13 A1b
O1a 5
12 O0b
O2a 6
11 O1b
O3a 7
10 O2b
GND 8
9 O3b
(Top view)
Logic Symbol
E
Pin Names
A0, A1
E
O0 to O 3
2
Address Inputs
Enable Inputs
Outputs
A0
A1
E
A0
A1
DECODER a
DECODER b
O0 O1 O2 O3
O0 O1 O2 O3
HD74AC139/HD74ACT139
Logic Diagram
Ea
O0a
Eb
A0a A1a
O1a
O2a
O3a
O0b
A0b A1b
O1b
O2b
O3b
Please note that this diagram is provided only for the understanding of logic operations and should not be
used to estimate propagation delays.
Functional Description
The HD74AC139/HD74ACT139 is a high-speed dual 1-of-4 decoder/demultiplexer. The device has two
independent decoders, each of which accepts two binary weighted inputs (A 0 to A1) and provides four
mutually exclusive active-Low outputs (O0 to 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 HD74AC139/HD74ACT139 generates all four minterms of two variables.
These four minterms are useful in some applications, replacing multiple gate functions as shown in Figure
a, and thereby reducing the number of packages required in a logic network.
Truth Table
Inputs
Outputs
E
A0
A1
O0
O1
O2
O3
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 :
L :
X :
High Voltage Level
Low Voltage Level
Immaterial
3
HD74AC139/HD74ACT139
Figure a: Gate Functions (each half)
E
E
A0
O0
A0
A1
A1
E
E
A0
O1
A0
A1
A1
E
E
A0
O2
A1
E
E
O3
A1
O1
A0
A1
A0
O0
O2
A0
O3
A1
DC Characteristics (unless otherwise specified)
Item
Symbol
Max
Unit
Condition
Maximum quiescent supply current
I CC
80
µA
VIN = VCC or ground, VCC = 5.5 V,
Ta = Worst case
Maximum quiescent supply current
I CC
8.0
µA
VIN = VCC or ground, VCC = 5.5 V,
Ta = 25°C
Maximum ICC/input (HD74ACT139)
I CCT
1.5
mA
VIN = VCC – 2.1 V, VCC = 5.5 V
Ta = Worst case
4
HD74AC139/HD74ACT139
AC Characteristics: HD74AC139
Ta = +25°C
CL = 50 pF
Ta = –40°C to +85°C
CL = 50 pF
Item
Symbol
VCC (V)*1
Min
Typ
Max
Min
Max
Unit
Propagation delay
t PLH
3.3
1.0
8.0
11.5
1.0
13.0
ns
5.0
1.0
6.5
8.5
1.0
9.5
3.3
1.0
7.0
10.0
1.0
11.0
5.0
1.0
5.5
7.5
1.0
8.5
3.3
1.0
9.5
12.0
1.0
13.0
5.0
1.0
7.0
8.5
1.0
10.0
3.3
1.0
8.0
10.0
1.0
11.0
5.0
1.0
6.0
7.5
1.0
8.5
An to On
Propagation delay
t PHL
An to On
Propagation delay
t PLH
En to On
Propagation delay
t PHL
En to On
Note:
ns
ns
ns
1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
AC Characteristics: HD74ACT139
Ta = +25°C
CL = 50 pF
Ta = –40°C to +85°C
CL = 50 pF
Item
Symbol
VCC (V)*1
Min
Typ
Max
Min
Max
Unit
Propagation delay
An to On
t PLH
5.0
1.0
6.0
8.5
1.0
9.5
ns
Propagation delay
An to On
t PHL
5.0
1.0
6.0
9.5
1.0
10.5
ns
Propagation delay
En to On
t PLH
5.0
1.0
7.0
10.0
1.0
11.0
ns
Propagation delay
En to On
t PHL
5.0
1.0
7.0
9.5
1.0
10.5
ns
Note:
1. Voltage Range 5.0 is 5.0 V ± 0.5 V
Capacitance
Item
Symbol
Typ
Unit
Condition
Input capacitance
CIN
4.5
pF
VCC = 5.5 V
Power dissipation capacitance
CPD
40.0
pF
VCC = 5.0 V
5
HD74AC139/HD74ACT139
Package Dimensions
Unit: mm
19.20
20.00 Max
6.30
9
1
7.40 Max
16
8
1.3
0.48 ± 0.10
7.62
2.54 Min 5.06 Max
2.54 ± 0.25
0.51 Min
1.11 Max
+ 0.13
0.25 – 0.05
0° – 15°
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
DP-16
Conforms
Conforms
1.07 g
Unit: mm
10.06
10.5 Max
9
1
8
1.27
*0.42 ± 0.08
0.40 ± 0.06
0.10 ± 0.10
0.80 Max
*0.22 ± 0.05
0.20 ± 0.04
2.20 Max
5.5
16
0.20
7.80 +– 0.30
1.15
0° – 8°
0.70 ± 0.20
0.15
0.12 M
*Dimension including the plating thickness
Base material dimension
6
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
FP-16DA
—
Conforms
0.24 g
HD74AC139/HD74ACT139
Unit: mm
9.9
10.3 Max
9
1
8
*0.42 ± 0.08
0.40 ± 0.06
*0.22 ± 0.03
0.20 ± 0.03
0.635 Max
+ 0.11
1.27
0.14 – 0.04
1.75 Max
3.95
16
+ 0.10
6.10 – 0.30
1.08
0° – 8°
0.67
0.60 +– 0.20
0.15
0.25 M
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
*Dimension including the plating thickness
Base material dimension
FP-16DN
Conforms
Conforms
0.15 g
Unit: mm
4.40
5.00
5.30 Max
16
9
1
8
0.65
1.10 Max
0.65 Max
0.10
*Dimension including the plating thickness
Base material dimension
6.40 ± 0.20
0.07 +0.03
–0.04
0.20 ± 0.06
1.0
0.13 M
*0.17 ± 0.05
0.15 ± 0.04
0.08
*0.22 +– 0.07
0° – 8°
0.50 ± 0.10
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
TTP-16DA
—
—
0.05 g
7
HD74AC139/HD74ACT139
Cautions
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contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
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for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
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failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
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