HD74LV244A Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74LV244A

Octal Buffers / Drivers with 3-state Outputs

Hitachi -> Renesas Electronics 

• Waveform – 1

Input A

tr

10%

90%

50% VCC

tPLH

tf

90%

50% VCC

10 %

tPHL

Output Y

50% VCC

50% VCC

HD74LV244A

VCC

0V

VOH

VOL

• Waveform – 2

tf

tr

90%

90%

VCC

Input OE

50% VCC

50% VCC

10%

10 %

0V

tZL

tLZ

Waveform – A

Waveform – B

50% VCC

tZH

50% VCC

VOL + 0.3 V

tHZ

VOH – 0.3 V

VCC

VOL

VOH

0V

Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 3 ns, tf ≤ 3 ns

2. Waveform-A is for an output with internal conditions such that the output is low except when disabled

by the output control.

3. Waveform-B is for an output with internal conditions such that the output is high except when disabled

by the output control.

4. The output are measured one at a time with one transition per measurement..

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