HD74LS74AP datasheet(5/8 Pages) RENESAS

Part #	HD74LS74AP

Description	Dual D-type Positive Edge-triggered Flip-Flops (with Preset and Clear)

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Manufacturer	RENESAS [Renesas Technology Corp]

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5 / 8 page

HD74LS74A

Preliminary

R04DS0012EJ0400 Rev.4.00

Page 5 of 7

Dec 21, 2011

Waveforms 1

tw(H)

tPHL

VOH

VOL

0 V

3 V

0 V

3 V

VOH

VOL

tw(L)

tPHL

tPLH

10%

90%

1.3 V

10%

90%

Clock

D

Q

tTLH

tTHL

Note:

Clock input pulse; tTLH  15 ns, tTHL  6 ns, PRR = 1 MHz, duty cycle = 50% and for fmax,

tTLH = tTHL  2.5 ns

Waveforms 2

Clear

Preset

Q

VOH

VOL

0V

3V

1.3V

tTHL

tTLH

tw (clear)

≥ 25ns

tw (preset)

≥ 25ns

tTLH

tTHL

tPHL

tPLH

10%

90%

1.3V

tPLH

tPHL

Note:

Crear and presel input pulse; tTLH  15 ns, tTHL  6 ns, PRR = 1 MHz,

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