74LS280 datasheet(1/4 Pages) ONSEMI

Il numero della parte	74LS280

Spiegazioni elettronici	LOW POWER SCHOTTKY

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December, 1999 – Rev. 6

1

Publication Order Number:

SN74LS280/D

SN74LS280

9-Bit Odd/Even Parity

Generators/Checkers

The SN74LS280 is a Universal 9-Bit Parity Generator / Checker. It

features odd / even outputs to facilitate either odd or even parity. By

cascading, the word length is easily expanded.

The LS280 is designed without the expander input implementation,

but the corresponding function is provided by an input at Pin 4 and the

absence of any connection at Pin 3. This design permits the LS280 to

be substituted for the LS180 which results in improved performance.

The LS280 has buffered inputs to lower the drive requirements to one

LS unit load.

• Generates Either Odd or Even Parity for Nine Data Lines

• Typical Data-to-Output Delay of only 33 ns

• Cascadable for n-Bits

• Can Be Used To Upgrade Systems Using MSI Parity Circuits

• Typical Power Dissipation = 80 mW

14

13

12

11

10

9

123

456

8

7

VCC

FE

D

C

B

A

G

H

NC

I

∑

EVEN

GND

FE

D

C

B

A

G

HI

INPUTS

INPUT

OUTPUTS

∑

ODD

∑

EVEN

∑

ODD

INPUTS

FUNCTION TABLE

NUMBER OF INPUTS A

OUTPUTS

THRU 1 THAT ARE HIGH

∑EVEN ∑ODD

0, 2, 4, 6, 8

H

L

1, 3, 5, 7, 9

L

H

H = HIGH Level, L = LOW Level

GUARANTEED OPERATING RANGES

Symbol

Parameter

Min

Typ

Max

Unit

VCC

Supply Voltage

4.75

5.0

5.25

V

TA

Operating Ambient

Temperature Range

0

25

70

°C

IOH

Output Current – High

– 0.4

mA

IOL

Output Current – Low

8.0

mA

LOW

POWER

SCHOTTKY

Device

Package

Shipping

ORDERING INFORMATION

SN74LS280N

14 Pin DIP

2000 Units/Box

SN74LS280D

14 Pin

SOIC

D SUFFIX

CASE 751A

http://onsemi.com

2500/Tape & Reel

PLASTIC

N SUFFIX

CASE 646

14

1

14

1

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