HD74LS273 Datasheet, PDF(4/7 Page) Hitachi Semiconductor – Octal D-type Positive-edge-triggered Flip-Flops(with Clear)

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HD74LS273 Datasheet, PDF (4/7 Pages) Hitachi Semiconductor – Octal D-type Positive-edge-triggered Flip-Flops(with Clear)

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HD74LS273

Waveforms 1

tTLH

tTHL

Data

10%

90%

1.3 V

90%

1.3 V

10%

tsu

tTLH

tTHL

Clock

90% 90%

1.3 V 1.3 V

10%

tPLH

1.3 V

tPHL

1.3 V

Notes: Input pulse; tTLH â¤ 15 ns, tTHL â¤ 6 ns,

Clock input; PRR = 1 MHz, duty cycle 50%

Data input; PRR = 500 kHz, duty cycle 50%

1.3 V

Waveforms 2

Clear

Clock

tTHL

tTLH

90%

1.3V

10%

tPHL

90%

1.3V

10%

tTHL

90%

1.3V

10%

1.3V

Note: Input pulse: tTLH â¤ 15 ns, tTHL â¤ 6 ns, PRR = 1 MHz.

tTLH

90%

1.3V

10%

tPLH

1.3V

VOH

VOL

VOH

VOL

Rev.3.00, Jul.15.2005, page 4 of 6

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