HD74HC194P データシートの表示（PDF） - Renesas Electronics

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HD74HC194P

4-bit Bidirectional Universal Shift Register

Renesas Electronics 

HD74HC194

Waveforms

• Waveform – 1

tn tn+1

tr

tf

Clock

50%

tsu th

L or R 50%

50%

tPLH

Q

50%

tn tn+1

50%

tsu th

50%

50%

tPHL

50%

Notes : 1. For right shift, measure QA at tn+1, QB at tn+2,

QC at tn+3, QD at tn+4, respectively.

For left shift, measure QA at tn+4, QB at tn+3,

QC at tn+2, QD at tn+1, respectively.

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

• Waveform – 2

tr

tf

Clock

10 %

90 %

50 % 50 %

tw

10 %

tf

Clear

90 %

50 %

10 %

tPHL

Q

50 %

10 %

tTHL

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

VCC

0V

VCC

0V

VOH

VOL

VCC

0V

VOH

VOL

VOH

VOL

Rev.2.00 Jan 31, 2006 page 7 of 8

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