TCA6408A: Case parallel pin is not connected and left open.

Ohad Bonneh

Part Number: TCA6408A

Hi Team,

On my design (P5-P7) are not used. I am not sure D/S coves the case parallel pin is not connected and left open.

Is that Okay or PU/PD should be added?

best regards.

+1 Clemens Ladisch over 2 years ago

Guru 316240 points

Unused outputs can be left open. Inputs must not float, so the must be connected to V_CC or GND, with or without a resistor.

+1 Tyler Townsend over 2 years ago

Hi Ohad,

I agree with Clemens' response.

P-ports configured to outputs can be left floating.

P-ports configured as inputs must not float. So a connection to VCC/GND is highly recommended, either using a pull-up or pull-down resistor.

Regards,

Tyler

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