PCA9535A GPIO expander

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PCA9535A GPIO expander

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arios100
Contributor I

Hello, 

I have the reset signal going to the PCA9535A reset input being driven by a 3.3V signal but the PCA9535A is being powered by 1.8V VDD. Is this allowed? The datasheet says its 5V tolerant. 

arios100_0-1647924952059.png

 

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4 Replies

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arios100
Contributor I

the PCA9539A is from 1.65 to 5.5V see below.

arios100_0-1647925879824.png

 

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496 Views
guoweisun
NXP TechSupport
NXP TechSupport

Understand, please connect the RESET pin to VDD.

 

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arios100
Contributor I

I don't have a 1.8V  output reset signal, only have the 3.3V reset signal. 

Are you saying that reset input is not 3.3V tolerant when gpio's VDD is 1.8V?

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501 Views
guoweisun
NXP TechSupport
NXP TechSupport

Please get note that the VDD range is from 2.3V to 5.5V, the 1.8V can't be used.

 

 

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