SN74AVC2T45

Tomohiko Sugiyama

Intellectual 815 points

Other Parts Discussed in Thread: SN74AVC2T45

Please let me confirm some questions about SN74AVC2T45.

What are the A-port outputs in Vcc1 no supply ?

My customer want to set the following sequence.

Power Supply Sequence

①Vcc2 (3.3V) Supply

②100ms

③Vcc1(1.8V) Supply

What are the A-port outputs in Vcc1 no supply(during 100ms) ?

Please refer to the Appendix.

Best regards

Sugiyama

7446.SN74AVC2T45_20130813.pdf

over 12 years ago

0 Junjie Mai over 12 years ago

TI__Expert 4705 points

Hi, Sugiyama

Based on your application. when VCC2 is on while VCC1 is off the A port outputs will be in high-Z status.

BR
Junjie

0 Tomohiko Sugiyama over 12 years ago in reply to Junjie Mai

Intellectual 815 points

Hi Junjie-san

Thank you for the Answer !

But I'm sorry.

I had a mistake about conditions.

The Following is correct.

"1.8V⇒3.3V level shift"

①Vcc1 (3.3V) Supply

②100ms

③Vcc2(1.8V) Supply

What are the A-port outputs in Vcc2 no supply(during 100ms) ?

Please refer to the Appendix.

Best Regards,
Sugiyama

8272.SN74AVC2T45_20130815.pdf

0 Junjie Mai over 12 years ago in reply to Tomohiko Sugiyama

TI__Expert 4705 points

Hi, Sugiyama

it is same, which is High-Z state.

you can check the datasheet, this part has the VCC isolation feature, when either VCC is on, while the other is 0V, the part will be in high-z status for the output.

BR
junjie

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SN74AVC2T45