PCA9535HFHP vs PCA9555AHF,128

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PCA9535HFHP vs PCA9555AHF,128

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zhang11go
Contributor I

Hello,

We're in shortage of PCA9535HFHP for a production planning. Need your help to advise if we can use PCA9555AHF,128 as alternative. Looks like these two parts are pin-to-pin compatible and no change on software control, am I right? It's used for I2C-to-GPIO expanding and we don't care much upon power consumption, I/O toggling speed, etc. There're external pull-up resistors on our board for all the expanded I/Os. 

Thanks,

Jerry 

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zhang11go
Contributor I

Hi Jozef,

Thanks much for your quick response and confirmation. It’s really helpful and we can move forward with the replacement.

Best,

Jerry

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JozefKozon
NXP TechSupport
NXP TechSupport

Hello Jerry,

The PCA9535 is identical to the PCA9555A. The only difference is the internal pull-up resistors in case of the PCA9555A.

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JozefKozon_1-1666339480982.png

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JozefKozon_4-1666339700323.png

With Best Regards,

Jozef

 

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zhang11go
Contributor I

Hi Jozef,

Thanks much for your quick response and confirmation. It’s really helpful and we can move forward with the replacement.

Best,

Jerry