PCAL6408a power sequence

thomaskofoedhan · ‎01-25-2018

Are there any known requirements to power sequencing between the 2 power rails of PCAL6408?

Thomas

TomasVaverka · ‎01-26-2018

Hi Thomas,

There is no power sequence requirement for these two power rails. If I/O interface is not powered then nothing works since core operation is from I/O power (VDDP) and POR circuitry is also off.

Best regards,

Tomas

View solution in original post

TomasVaverka · ‎01-26-2018

Hi Thomas,

There is no power sequence requirement for these two power rails. If I/O interface is not powered then nothing works since core operation is from I/O power (VDDP) and POR circuitry is also off.

Best regards,

Tomas