HD74BC645A Datasheet, PDF(7/9 Page) Hitachi Semiconductor – Octal Bus Transceivers With 3 State Outputs

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HD74BC645A Datasheet, PDF (7/9 Pages) Hitachi Semiconductor – Octal Bus Transceivers With 3 State Outputs

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Waveforms-2

HD74BC645A

90 %

1.5 V

10 %

Waveform â A

Waveform â B

tZL

1.5 V

tZH

1.5 V

90 %

1.5 V

10 %

tLZ

tHZ

VOL + 0.3 V

VOH â 0.3 V

3.5 V

VOL

VOH

Notes: 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.

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