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Part Number HD74HC131

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HD74HC131
3-to-8-line Decoder/Demultiplexer with Edge-Triggered
Address Registers
Description
The HD74HC131 is 3-to-8 linedecoder. It has Address select inputs (A,B,C) and D type register.
Address select data store to D type registers, during the positive going transition of the clock pulse.
Output control (G
1
, G
2
) are independent of select input and CLK input, and when G
1
is low or G
2
= High,
all outputs is high.
Features
·
High Speed Operation: t
pd
(CLK to Y) = 20 ns typ (C
L
= 50 pF)
·
High Output Current: Fanout of 10 LSTTL Loads
·
Wide Operating Voltage: V
CC
= 2 V to 6 V
·
Low Input Current: 1 µA max
·
Low Quiescent Supply Current: I
CC
(static) = 4 µA max (Ta = 25°C)
HD74HC131
2
Function Table
Inputs
Enable
Select
Outputs
CLK G1
G
2
C
B
A
Y
0
Y
1
Y
2
Y
3
Y
4
Y
5
Y
6
Y
7
X
X
H
X
X
X
H
H
H
H
H
H
H
H
X
L
X
X
X
X
H
H
H
H
H
H
H
H
H
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
H
H
L
H
H
H
H
H
H
H
L
L
H
L
H
H
L
H
H
H
H
H
H
L
L
H
H
H
H
H
L
H
H
H
H
H
L
H
L
L
H
H
H
H
L
H
H
H
H
L
H
L
H
H
H
H
H
H
L
H
H
H
L
H
H
L
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
H
H
H
H
H
L
L
H
L
X
X
X
Outputs corresponding to stored address, L; all others H
Pin Arrangement
1
(Top view)
A
2
B
3
C
4
CLK
5
G
2
6
G
1
7
Y
7
8
GND
V
CC
16
Y
0
15
Y
1
14
Y
2
13
Y
3
12
Y
4
11
Y
5
10
Y
6
9
HD74HC131
3
Logic Diagram
Y
7
G
1
CLK
C
B
A
G
2
Y
6
Y
5
Y
4
Y
3
Y
2
Y
1
Y
0
HD74HC131
4
DC Characteristics
Ta = 25
°
C
Ta = ­40 to
+85
°
C
Item
Symbol
V
CC
(V) Min Typ Max Min
Max
Unit
Test Conditions
Input voltage
V
IH
2.0
1.5
--
--
1.5
--
V
4.5
3.15 --
--
3.15
--
6.0
4.2
--
--
4.2
--
V
IL
2.0
--
--
0.5
--
0.5
V
4.5
--
--
1.35 --
1.35
6.0
--
--
1.8
--
1.8
Output voltage
V
OH
2.0
1.9
2.0
--
1.9
--
V
Vin = V
IH
or V
IL
I
OH
= ­20
µ
A
4.5
4.4
4.5
--
4.4
--
6.0
5.9
6.0
--
5.9
--
4.5
4.18 --
--
4.13
--
I
OH
= ­4 mA
6.0
5.68 --
--
5.63
--
I
OH
= ­5.2 mA
V
OL
2.0
--
0.0
0.1
--
0.1
V
Vin = V
IH
or V
IL
I
OL
= 20
µ
A
4.5
--
0.0
0.1
--
0.1
6.0
--
0.0
0.1
--
0.1
4.5
--
--
0.26 --
0.33
I
OL
= 4 mA
6.0
--
--
0.26 --
0.33
I
OL
= 5.2 mA
Input current
Iin
6.0
--
--
±
0.1 --
±
1.0
µ
A
Vin = V
CC
or GND
Quiescent supply
current
I
CC
6.0
--
--
4.0
--
40
µ
A
Vin = V
CC
or GND, Iout = 0
µ
A
HD74HC131
5
AC Characteristics (C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Ta = 25
°
C
Ta = ­40 to
+85
°
C
Item
Symbol
V
CC
(V) Min Typ Max Min
Max
Unit
Test Conditions
Propagation delay t
PLH
2.0
--
--
210 --
265
ns
CLK to Y
time
t
PHL
4.5
--
20
42
--
53
6.0
--
--
36
--
45
t
PLH
2.0
--
--
140 --
175
ns
G
1
or
G
2
to Y
t
PHL
4.5
--
15
28
--
35
6.0
--
--
24
--
30
Pulse width
t
w
2.0
80
--
--
100
--
ns
4.5
16
5
--
20
--
6.0
14
--
--
17
--
Setup time
t
su
2.0
50
--
--
65
--
ns
4.5
10
2
--
13
--
6.0
9
--
--
11
--
Hold time
t
h
2.0
5
--
--
5
--
ns
4.5
5
­1
--
5
--
6.0
5
--
--
5
--
Output rise/fall
t
TLH
2.0
--
--
75
--
95
ns
time
t
THL
4.5
--
5
15
--
19
6.0
--
--
13
--
16
Input capacitance
Cin
--
--
5
10
--
10
pF