TCA9539-Q1: PIN state when power down

junsong gu

Part Number: TCA9539-Q1
Other Parts Discussed in Thread: TCA9539

HI TI,

Could you help confirm the Port state of group 0&1 ? its shirt to ground or high impedence?

junsong

0 Clemens Ladisch over 2 years ago

Guru 317390 points

Footnote (1) in section 6.3 implies that it is high impedance, but that there is a noticeable leakage current. The amount is not specified.

0 BOBBY over 2 years ago

Junsong,

The TCA9539 is considered "high impedance" when the device is unpowered.

-Bobby

Interface forum