HD74BC540A Datasheet, PDF(6/8 Page) Hitachi Semiconductor – Octal Buffers/Line Drivers With 3 State Outputs

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HD74BC540A Datasheet, PDF (6/8 Pages) Hitachi Semiconductor – Octal Buffers/Line Drivers With 3 State Outputs

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HD74BC540A

Waveforms-1

Input A

Output Y

90 %

1.5 V

10 %

tPLH

1.5 V

10 %

90 %

1.5 V

tPHL

1.5 V

VOH

VOL

Waveforms-2

Notes:

Input G

90 %

1.5 V

90 %

1.5 V

10 %

tZL

tLZ

WaveformâA

WaveformâB

1.5 V

tZH

1.5 V

VOL + 0.3 V

tHZ

VOH â 0.3 V

3.5 V

VOL

VOH

1. tr = 2.5 ns, tf = 2.5 ns

2. Input waveforms: PRR = 1 MHz, duty cycle 50%

3. Waveform-A shows input conditions such that the output is âLâ level when enable by the

output control.

4. Waveform-B shows input conditions such that the output is âHâ level when enable by the

output control.

Rev.2.00, Jul.16.2004, page 6 of 7

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