HD74LS74ARPEL 查看數據表（PDF） - Renesas Electronics

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HD74LS74ARPEL

Dual J-K Flip-Flops(with Preset/ Common Clear/ and Common Clock)

Renesas Electronics 

HD74LS74A

Waveforms 1

tTLH

tTHL

90% 90%

tw(L)

3V

1.3 V 1.3 V

1.3 V

Clock

10%

10%

0V

tw(H)

3V

D

tPLH

1.3 V

Q

tPHL

tPHL

1.3 V

tPLH

0V

VOH

VOL

Note:

Q

1.3 V

VOH

1.3 V

VOL

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

tTHL

tTLH

90%

1.3V

10%

tw (clear)

≥ 25ns

90%

1.3V

10%

tPHL

1.3V

tPLH

3V

tTHL

tTLH

90%

1.3V

10%

tw (preset)

≥ 25ns

tPLH

90%

1.3V

10%

1.3V

0V

3V

0V

VOH

VOL

VOH

1.3V

1.3V

Q

tPHL

VOL

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

Rev.3.00, Jul.22.2005, page 5 of 7

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