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Электронный компонент: HD74AC4514

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HD74AC4514
4-bit Latch/4-to-16-Line Decoder
Description
This device presents a 4 to 16 line decoder with latched inputs. The HD74AC4514 presents a high level at
the selected output.
This device consists of four storage latches with common strobe and inhibit (
G) inputs. When a low signal
is applied to the strobe input, the input data is stored, decoded, and presented to the output. When strobe is
high, all sixteen HD74HC4514 outputs are at a low logic level.
Feature
Outputs Source/Sink 24 mA
HD74AC4514
2
Pin Arrangement
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Strobe
(Top view)
V
CC
Inhibit
Data4
Data3
S
10
S
11
S
8
S
9
S
14
S
15
S
12
S
13
Data1
Data2
S
7
S
6
S
5
S
4
S
3
S
2
S
1
S
0
GND
Logic Symbol
Latch
4 to 16
Decoder
2
Data 1
Data 2
Data 3
Data 4
Strobe
Inhibit
3
21
22
1
23
A
S
0
S
1
S
2
S
3
S
4
S
5
S
6
S
7
S
8
S
9
S
10
S
11
S
12
S
13
S
14
S
15
B
C
D
11
9
10
8
7
6
5
4
18
17
20
19
14
13
16
15
HD74AC4514
3
Pin Names
D
1
to D
4
Data Inputs
Strobe
Data Strobe Input
Data1 to 4
Data Inputs
S
0
to S
15
Outputs
Inhibit
Data Enable Input
Function Table (Strobe = High)
Data Inputs
Inhibit
D
C
B
A
Select Outputs
L
L
L
L
L
S
0
L
L
L
L
H
S
1
L
L
L
H
L
S
2
L
L
L
H
H
S
3
L
L
H
L
L
S
4
L
L
H
L
H
S
5
L
L
H
H
L
S
6
L
L
H
H
H
S
7
L
H
L
L
L
S
8
L
H
L
L
H
S
9
L
H
L
H
L
S
10
L
H
L
H
H
S
11
L
H
H
L
L
S
12
L
H
H
L
H
S
13
L
H
H
H
L
S
14
L
H
H
H
H
S
15
H
X
X
X
X
All output "L"
HD74AC4514
4
Logic Diagram
D
LE
Q
Q
D
LE
Q
Q
D
LE
Q
Q
D
LE
Q
Q
Data 1
Data 2
Data 3
Data 4
Strobe
INH
S
0
S
1
S
2
S
3
S
4
S
5
S
6
S
7
S
8
S
9
S
10
S
11
S
12
S
13
S
14
S
15
DC Characteristics (unless otherwise specified)
Item
Symbol
Max
Unit
Condition
Maximum quiescent supply current
I
CC
80
A
V
IN
= V
CC
or ground, V
CC
= 5.5 V,
Ta = Worst case
Maximum quiescent supply current
I
CC
8.0
A
V
IN
= V
CC
or ground, V
CC
= 5.5 V,
Ta = 25
C
HD74AC4514
5
AC Characteristics: HD74AC4514
Ta = +25
C
C
L
= 50 pF
Ta = 40
C to +85
C
C
L
= 50 pF
Item
Symbol
V
CC
(V)*
1
Min
Typ
Max
Min
Max
Unit
Propagation delay
t
PLH
3.3
1.0
12.0
15.5
1.0
17.0
ns
D
n
to
O
n
5.0
1.0
9.0
11.0
1.0
12.0
Propagation delay
t
PHL
3.3
1.0
12.5
15.5
1.0
17.0
ns
D
n
to
O
n
5.0
1.0
9.0
11.0
1.0
12.0
Propagation delay
t
PLH
3.3
1.0
9.5
15.0
1.0
16.0
ns
OE
to
O
n
5.0
1.0
7.0
10.5
1.0
11.5
Propagation delay
t
PHL
3.3
1.0
9.0
15.0
1.0
16.5
ns
OE
to
O
n
5.0
1.0
6.5
10.5
1.0
11.5
Propagation delay
t
PLH
3.3
1.0
14.0
19.0
1.0
21.0
ns
LE
to
O
n
5.0
1.0
10.0
13.5
1.0
15.0
Propagation delay
t
PHL
3.3
1.0
14.5
19.0
1.0
21.0
ns
LE
to
O
n
5.0
1.0
10.5
13.5
1.0
15.0
Note:
1. Voltage Range 3.3 is 3.3 V
0.3 V
Voltage Range 5.0 is 5.0 V
0.5 V
AC Operating Requirements: HD74AC4514
Ta = +25
C
C
L
= 50 pF
Ta = 40
C
to +85
C
C
L
= 50 pF
Item
Symbol
V
CC
(V)*
1
Typ
Guaranteed Minimum
Unit
Setup time, HIGH or LOW
t
su
3.3
1.5
3.5
4.0
ns
D
n
to Strobe
5.0
1.0
3.0
3.5
Hold time, HIGH or LOW
t
h
3.3
1.0
2.5
3.0
ns
D
n
to Strobe
5.0
0.5
1.5
2.0
Pulse width, HIGH
t
w
3.3
3.0
5.5
7.0
ns
5.0
3.0
4.5
5.0
Note:
1. Voltage Range 3.3 is 3.3 V
0.3 V
Voltage Range 5.0 is 5.0 V
0.5 V