HD74HC299 Datasheet, PDF(6/9 Page) Hitachi Semiconductor – 8-bit Universal Shift/Storage Register (with 3-state outputs)

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HD74HC299 Datasheet, PDF (6/9 Pages) Hitachi Semiconductor – 8-bit Universal Shift/Storage Register (with 3-state outputs)

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HD74HC299

Test Circuit

VCC

Output

Input

Pulse Generator

A/QA

S1 to H/QH

Zout = 50 â¦

Output

1 k â¦ S1

CL =

50 pF

OPEN

GND

VCC

Input

Pulse Generator

Zout = 50 â¦

Clock

Clear

QA'

Output CL =

50 pF

QH'

CL =

50 pF

TEST

tPLH / t PHL

tZH/ t HZ

tZL / t LZ

OPEN

GND

VCC

Note : 1. CL includes probe and jig capacitance.

Waveforms

â¢ Waveform â 1

Clock

Clear

50 %

90 %

50 %

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 â¤ 1 MHz, Zo = 50 â¦, tr â¤ 6 ns, tf â¤ 6 ns

VCC

50 %

VCC

tPHL

50 %

VOH

VOL

Rev.2.00 Jan 31, 2006 page 6 of 8

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