ETC HD74AC280/HD74ACT280

HD74AC280/HD74ACT280
9-bit Parity Generator/Checker
ADE-205-387 (Z)
1st. Edition
Sep. 2000
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
I6 1
14 VCC
I7 2
13 I5
NC 3
12 I4
I8 4
11 I3
ΣE 5
10 I2
ΣO 6
9 I1
GND 7
8 I0
(Top view)
HD74AC280/HD74ACT280
Logic Symbol
I0
I1
I2
I3
ΣO
I4
I5
I6
I7
I8
ΣE
Pin Names
I0 – I8
O
E
Data Inputs
Odd Parity Output
Even Parity Output
Truth Table
Outputs
Number of High Inputs I0 – I 8
∑ Even
∑ Odd
0, 2, 4, 6, 8
H
L
1, 3, 5, 7, 9
L
H
H :
L :
2
High Voltage Level
Low Voltage Level
HD74AC280/HD74ACT280
Logic Diagram
I8
I7
I6
I5
ΣO
I4
I3
I2
I1
I0
ΣE
Please note that this diagram is provided only for the understanding of logic operations and should not be
used to estimate propagation delays.
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HD74AC280/HD74ACT280
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 (HD74ACT280)
I CCT
1.5
mA
VIN = VCC – 2.1 V, VCC = 5.5 V,
Ta = Worst case
AC Characteristics: HD74AC280
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
14.5
17.0
1.0
18.5
ns
5.0
1.0
11.0
13.0
1.0
14.5
3.3
1.0
14.5
17.0
1.0
18.5
5.0
1.0
11.0
13.0
1.0
14.5
Propagation delay
Note:
t PHL
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: HD74ACT280
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
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
CIN
4.5
pF
VCC = 5.5 V
Power dissipation capacitance
CPD
60.0
pF
VCC = 5.0 V
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HD74AC280/HD74ACT280
Package Dimensions
Unit: mm
19.20
20.32 Max
8
6.30
7.40 Max
14
1.30
7
2.54 ± 0.25
0.48 ± 0.10
0.51 Min
2.39 Max
7.62
2.54 Min 5.06 Max
1
+ 0.10
0.25 – 0.05
0° – 15°
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
DP-14
Conforms
Conforms
0.97 g
Unit: mm
10.06
10.5 Max
8
5.5
14
1
0.10 ± 0.10
1.42 Max
1.27
*0.42 ± 0.08
0.40 ± 0.06
*0.22 ± 0.05
0.20 ± 0.04
2.20 Max
7
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
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
FP-14DA
—
Conforms
0.23 g
5
HD74AC280/HD74ACT280
Unit: mm
8.65
9.05 Max
8
1
7
*0.20 ± 0.05
0.635 Max
1.75 Max
3.95
14
+ 0.10
6.10 – 0.30
1.08
*0.40 ± 0.06
0.11
0.14 +– 0.04
0° – 8°
1.27
+ 0.67
0.60 – 0.20
0.15
0.25 M
*Pd plating
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Hitachi Code
JEDEC
EIAJ
Mass (reference value)
FP-14DN
Conforms
Conforms
0.13 g
HD74AC280/HD74ACT280
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
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 failsafes, 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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