HD74HC299 데이터 시트보기 (PDF) - Renesas Electronics

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HD74HC299

8-bit Universal Shift/Storage Register (with 3-state outputs)

Renesas Electronics 

HD74HC299

Test Circuit

VCC

VCC

G1

Output

Input

Pulse Generator

G2

G

A/QA

S1 to H/QH

Zout = 50 Ω

S0

Output

1 k Ω S1

CL =

50 pF

OPEN

GND

VCC

Input

Pulse Generator

Zout = 50 Ω

SR

Clock

SL

Clear

QA'

Output CL =

50 pF

QH'

CL =

50 pF

TEST

tPLH / t PHL

tZH/ t HZ

tZL / t LZ

S1

OPEN

GND

VCC

Note : 1. CL includes probe and jig capacitance.

Waveforms

• Waveform – 1

Clock

Clear

50 %

tf

tr

90 %

50 %

th

trem

10 %

90 %

50 %

tsu

SR or SL 50 %

50 %

tsu

S0 or S1 50 %

50 %

QA', QH'

QA, QH

tPLH, tPHL

90 %

50 %

10 %

tTLH, tTHL

tPHL, tPLH

90 %

50 %

10 %

tTHL, tTLH

Note : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns

VCC

0V

VCC

50 %

0V

VCC

0V

VCC

tPHL

50 %

0V

VOH

VOL

Rev.2.00 Jan 31, 2006 page 6 of 8

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