TCA9535: Vcc ramp up/down requirements

Yusuke Mukuno

Expert 7395 points

Part Number: TCA9535

Hi expert,

Could you please let me know the reason of the specification for Vcc ramp up/down?

Also, if Vcc rising/falling time is faster than this spec, how does the TCA9535 work?

Thanks

Muk

over 4 years ago

0 Danny Bacic over 4 years ago

TI__Mastermind 26776 points

Muk-san,

The characteristics of the rise and fall of V_CC exist to ensure proper initialization of the TCA9535. If these conditions aren't met, it is possible for the device to initialize improperly where the registers would not be set to their default values. Exceeding the max/mins would likely cause the POR to be unsuccessful.

Best,

Danny

0 Yusuke Mukuno over 4 years ago in reply to Danny Bacic

TI__Expert 7395 points

Hi Danny-san

Thank you for your answer!

Muk

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TCA9535: Vcc ramp up/down requirements