PCA9536: PCA9536DR P0~P3 default level H/L or?

Sean Liao (Yu-Sheng)

Part Number: PCA9536
Other Parts Discussed in Thread: TCA9536,

Hi sir,

Sorry to ask easy question, but can't find on datasheet?

What is PCA9536DR P0~P3 default status when the IC just start up?

High/Low or what?

Thanks a lot!

+1 Tyler Townsend 25 days ago

Hi Sean,

I would recommend switching to the TCA9536 if possible. It is the upgraded version and better cost structure.

Default values for the PCA9536 or TCA9536 are found in the command byte table:

P0-P3 power up as CMOS inputs. This is because the configuration register = 0xFF upon power up.

Regards,

Tyler

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