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Электронный компонент: HD74ACT280

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HD74AC280/HD74ACT280
9-bit Parity Generator/Checker
Description
The HD74AC280/HD74ACT280 is a high-speed parity generator/checker that accepts nine bits of input
data and detects whether an even or an odd number of these inputs is High. If an even number of inputs is
High, the Sum Even output is High. If an odd number is High, the Sum Even output is Low. The Sum Odd
output is the complement of the Sum Even output.
Features
Outputs Source/Sink 24 mA
HD74ACT280 has TTL-Cmpatible Inputs
Pin Arrangement
1
2
3
4
5
6
7
14
13
12
11
10
9
8
I
6
I
7
NC
I
8
E
O
GND
V
CC
I
5
I
4
I
3
I
2
I
1
I
0
(Top view)
HD74AC280/HD74ACT280
2
Logic Symbol
I
1
I
0
O
E
I
2
I
3
I
5
I
6
I
7
I
8
I
4
Pin Names
I
0
I
8
Data Inputs
O
Odd Parity Output
E
Even Parity Output
Truth Table
Outputs
Number of High Inputs I
0
I
8
Even
Odd
0, 2, 4, 6, 8
H
L
1, 3, 5, 7, 9
L
H
H :
High Voltage Level
L
:
Low Voltage Level
HD74AC280/HD74ACT280
3
Logic Diagram
I
8
O
E
I
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
Please note that this diagram is provided only for the understanding of logic operations and should not be
used to estimate propagation delays.
HD74AC280/HD74ACT280
4
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
Maximum I
CC
/input (HD74ACT280)
I
CCT
1.5
mA
V
IN
= V
CC
2.1 V, V
CC
= 5.5 V,
Ta = Worst case
AC Characteristics: HD74AC280
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
14.5
17.0
1.0
18.5
ns
5.0
1.0
11.0
13.0
1.0
14.5
Propagation delay
t
PHL
3.3
1.0
14.5
17.0
1.0
18.5
ns
5.0
1.0
11.0
13.0
1.0
14.5
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 Characteristics: HD74ACT280
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
5.0
1.0
12.5
15.0
1.0
16.5
ns
Propagation delay
t
PHL
5.0
1.0
12.5
15.0
1.0
16.5
ns
Note:
1. Voltage Range 5.0 is 5.0 V
0.5 V
Capacitance
Item
Symbol
Typ
Unit
Condition
Input capacitance
C
IN
4.5
pF
V
CC
= 5.5 V
Power dissipation capacitance
C
PD
60.0
pF
V
CC
= 5.0 V
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
DP-14
Conforms
Conforms
0.97 g
Unit: mm
7.62
0.25
0
15
19.20
20.32 Max
1
8
14
7
1.30
2.54
0.25
0.48
0.10
6.30
7.40 Max
0.51 Min
2.54 Min
5.06 Max
+ 0.10
0.05
2.39 Max
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
FP-14DA
--
Conforms
0.23 g
Unit: mm
*Dimension including the plating thickness
Base material dimension
*0.22
0.05
*0.42
0.08
0.70
0.20
0.12
0.15
0
8
M
0.10
0.10
2.20 Max
5.5
10.06
1.42 Max
14
8
1
7
10.5 Max
+ 0.20
0.30
7.80
1.15
1.27
0.40
0.06
0.20
0.04
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
FP-14DN
Conforms
Conforms
0.13 g
Unit: mm
0
8
1.27
14
8
1
7
0.15
0.25
M
1.75 Max
3.95
*0.20
0.05
8.65
9.05 Max
*0.40
0.06
0.14
+ 0.11 0.04
0.635 Max
6.10
+ 0.10
0.30
0.60
+ 0.67
0.20
1.08
*Pd plating
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
TTP-14D
--
--
0.05 g
Unit: mm
*Dimension including the plating thickness
Base material dimension
0.50
0.10
0
8
*0.17
0.05
6.40
0.20
0.10
1.10 Max
0.13 M
0.65
1
7
14
8
4.40
5.00
5.30 Max
0.83 Max
*0.22
+0.08
0.07
0.07
+0.03 0.04
0.20
0.06
0.15
0.04
1.0
Cautions
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received the latest product standards or specifications before final design, purchase or use.
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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.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
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
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-
safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi's sales office for any questions regarding this document or Hitachi semiconductor
products.
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