Datasheet HD74ACT280, HD74AC280 Datasheet (HIT)

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

NC

ΣE

ΣO

GND

1

6

I

I7

2

3

8

I

4

5

6

7

(Top view)

14

13

12

11

10

CC

V

I5

I4

I3

I2

I1

9

I0

8

HD74AC280/HD74ACT280

Logic Symbol

I1I0

Pin Names

I2 I3 I5 I6 I7 I8I4

ΣO ΣE

I0 – I

O

E

Data Inputs

8

Odd Parity Output
Even Parity Output

Truth Table

Outputs

Number of High Inputs I

0, 2, 4, 6, 8 H L
1, 3, 5, 7, 9 L H

H : High Voltage Level
L : Low Voltage Level

0

– I

8

∑ Even ∑ Odd

2

Logic Diagram

HD74AC280/HD74ACT280

I8

I7 I6 I5 I4 I3 I2 I1 I0

ΣO ΣE

Please note that this diagram is provided only for the understanding of logic operations and should not be
used to estimate propagation delays.

3

HD74AC280/HD74ACT280

DC Characteristics (unless otherwise specified)

Item Symbol Max Unit Condition

Maximum quiescent supply current I

Maximum quiescent supply current I

Maximum ICC/input (HD74ACT280) I

CC

CC

CCT

AC Characteristics: HD74AC280

80 µAV

8.0 µAV

1.5 mA VIN = VCC – 2.1 V, VCC = 5.5 V,

= VCC or ground, VCC = 5.5 V,

IN

Ta = Worst case

= VCC or ground, VCC = 5.5 V,

IN

Ta = 25°C

Ta = Worst case

Item Symbol V

Propagation delay t

PLH

(V)*1Min Typ Max Min Max Unit

CC

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

Item Symbol V

Propagation delay t
Propagation delay t

PLH

PHL

Note: 1. Voltage Range 5.0 is 5.0 V ± 0.5 V

(V)*1Min Typ Max Min Max Unit

CC

5.0 1.0 12.5 15.0 1.0 16.5 ns

5.0 1.0 12.5 15.0 1.0 16.5 ns

Ta = +25°C
C

= 50 pF

L

Ta = +25°C
C

= 50 pF

L

Ta = –40°C to +85°C
CL = 50 pF

Ta = –40°C to +85°C
CL = 50 pF

Capacitance

Item Symbol Typ Unit Condition

Input capacitance C
Power dissipation capacitance C

4

IN

PD

4.5 pF VCC = 5.5 V

60.0 pF VCC = 5.0 V

1

19.20

20.32 Max

1.30

Unit: mm

814

6.30

7.40 Max

7

2.54 ± 0.25

2.39 Max

0.48 ± 0.10

2.54 Min 5.06 Max

0.51 Min

Hitachi Code
JEDEC
EIAJ
Weight

7.62

+ 0.10

0.25

– 0.05

0° – 15°

(reference value)

DP-14
Conforms
Conforms

0.97 g

14

1.27

10.5 Max

1

10.06

1.42 Max

Unit: mm

8

5.5

7

+ 0.20

7.80

– 0.30

2.20 Max
*0.22 ± 0.05

1.15

0.20 ± 0.04
0° – 8°

0.70 ± 0.20

*0.42 ± 0.08

0.40 ± 0.06

*Dimension including the plating thickness

Base material dimension

0.12

0.10 ± 0.10

0.15

M

Hitachi Code
JEDEC
EIAJ

(reference value)

Weight

FP-14DA
—
Conforms

0.23 g

9.05 Max

14

Unit: mm

8.65

8

*Pd plating

1

0.635 Max

1.27

*0.40 ± 0.06

7

+ 0.11

– 0.04

0.14

0.25

3.95

1.75 Max

0.15

M

6.10

1.08

*0.20 ± 0.05

0.60

Hitachi Code
JEDEC
EIAJ
Weight

+ 0.10
– 0.30

0° – 8°

+ 0.67
– 0.20

(reference value)

FP-14DN
Conforms
Conforms

0.13 g

14 8

17

+0.08

*0.22

–0.07

0.20 ± 0.06

5.00

5.30 Max

0.83 Max

0.65

0.13

Unit: mm

4.40

1.0

M

6.40 ± 0.20

0.10

1.10 Max

*Dimension including the plating thickness

Base material dimension

0.15 ± 0.04

*0.17 ± 0.05

+0.03

–0.04

0.07

0° – 8°

Hitachi Code
JEDEC
EIAJ

(reference value)

Weight

0.50 ± 0.10

TTP-14D
—
—

0.05 g

Cautions

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intellectual property rights, in connection with use of the information contained in this document.

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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.

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products.

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