HD74HC280P Просмотр технического описания (PDF) - Renesas Electronics

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HD74HC280P

9-bit Odd/Even Parity Generator/Checker

Renesas Electronics 

HD74HC280

Test Circuit

VCC

Input

Pulse Generator

Zout = 50 Ω

VCC

Output

A

B

Σ

EVEN

C

D

E

Output

F

G

Σ

ODD

H

I

CL = 50 pF

CL = 50 pF

Note : 1. CL includes probe and jig capacitance.

Waveforms

• Waveform – 1

tr

tf

90 %

90 %

VCC

Input

50 %

50 %

10 %

10 %

0V

tPLH

tPHL

Same-phase

output

50 %

10 %

90 %

tPHL tTLH

90 %

VOH

50 %

10 %

VOL

tPLH

tTHL

Inverse-phase

output

90 %

50 %

10 %

tTHL

90 %

VOH

50 %

10 %

VOL

tTLH

Note : 1. Input waveform : PRR ≤ 1 MHz, duty cycle 50%, tr ≤ 6 ns, tf ≤ 6 ns

Rev.2.00 Jan 31, 2006 page 4 of 5

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