SN74LVC1G32-Q1: IF the OR IC power supply is 1.8V，the input high can be 3.3V signal?

CHENG KAI

Part Number: SN74LVC1G32-Q1

Hi,

In my design, I want to design a OR circuit, I have a problem:

if the OR IC power supply is 1.8V, so that the output high is 1.8V, but the input is 3.3V voltage, is the input OK?

Thanks,

Kai

0 Clemens Ladisch 2 months ago

Guru 259430 points

0 CHENG KAI 2 months ago in reply to Clemens Ladisch

Seems great！

So I just should change the 0Ω to100KR to contol the current never higher than 20mA. Right?

Thanks,

Kai

0 Clemens Ladisch 2 months ago in reply to CHENG KAI

Guru 259430 points

No, you do not need to control the current. LVC inputs do not have diodes to V_CC and are overvoltage tolerant.

0 CHENG KAI 2 months ago in reply to Clemens Ladisch

So my design below without any change will be OK?

Kai

0 Malcolm Lyn 2 months ago in reply to CHENG KAI

Yes, this design should be fine.

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