CD74HC280 datasheet(1/5 Pages) TI

Part #	CD74HC280

Description	High Speed CMOS Logic 9-Bit Odd/Even Parity Generator/Checker

PDF	5 Pages

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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1

Data sheet acquired from Harris Semiconductor

SCHS175

Features

• Typical Propagation Delay = 17ns at VCC = 5V,

CL = 15pF, TA = 25

oC

• Replaces 74LS180 Types

• Easily Cascadable

• Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Wide Operating Temperature Range . . . -55oC to 125oC

• Balanced Propagation Delay and Transition Times

• Signiﬁcant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30% of VCC

at VCC = 5V

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH

Description

The

Harris

CD74HC280

and

CD74HCT280

are

9-bit

odd/even parity, generator checker devices. Both even and

odd parity outputs are available for checking or generating

parity for words up to nine bits long. Even parity is indicated

(

ΣE output is high) when an even number of data inputs is

high. Odd parity is indicated (

ΣO output is high) when an odd

number of data inputs is high. Parity checking for words larger

than 9 bits can be accomplished by tying the

ΣE output to any

input of an additional HC/HCT280 parity checker.

Ordering Information

Pinout

CD74HC280, CD74HCT280

(PDIP)

TOP VIEW

Functional Diagram

I6

I7

NC

I8

ΣE

ΣO

GND

VCC

I5

I4

I3

I2

I1

I0

1

2

3

4

5

6

7

14

13

12

11

10

9

8

9

10

11

13

2

1

12

5

6

∑ ODD

∑ EVEN

I0

I1

I2

I3

I5

I6

I7

I4

4

I8

GND = 7

VCC = 14

NC = 3

November 1997

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

Copyright

CD74HC280,

CD74HCT280

High Speed CMOS Logic

9-Bit Odd/Even Parity Generator/Checker

File Number

1669.1

[ /Title

(CD74

HC280

,

CD74

HCT28

0)

/Sub-

ject

(High

Speed

CMOS

Logic

9-Bit

Odd/E

ven

Parity

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