HD74LS74A_15 Datasheet, PDF(5/8 Page) Renesas Technology Corp – Dual D-type Positive Edge-triggered Flip-Flops (with Preset and Clear)

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HD74LS74A_15 Datasheet, PDF (5/8 Pages) Renesas Technology Corp – Dual D-type Positive Edge-triggered Flip-Flops (with Preset and Clear)

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HD74LS74A

Waveforms 1

Clock

tTLH

tTHL

10%

90% 90%

1.3 V 1.3 V

tw(H)

tw(L)

10%

1.3 V

Preliminary

tPLH

1.3 V

tPHL

1.3 V

tPLH

VOH

VOL

Note:

1.3 V

VOH

1.3 V

VOL

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

tTLH = tTHL ï£ 2.5 ns

Waveforms 2

Clear

Preset

tTHL

tTLH

90%

1.3V

10%

tw (clear)

â¥ 25ns

90%

1.3V

10%

tPHL

1.3V

tPLH

tTHL

tTLH

90%

1.3V

10%

tw (preset)

â¥ 25ns

tPLH

90%

1.3V

10%

1.3V

VOH

VOL

VOH

1.3V

tPHL

VOL

Note: Crear and presel input pulse; tTLH ï£ 15 ns, tTHL ï£ 6 ns, PRR = 1 MHz,

R04DS0012EJ0400 Rev.4.00

Dec 21, 2011

Page 5 of 7

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