TCA9535: Clarification on VOH level for 3.3 VDD

Chetan Soni

Prodigy 30 points

Part Number: TCA9535

VDD- 3.3V

- We are using ALL IO ports as output pins, source current of 0.3mA

- In datasheet page no 5, VOH min only mentioned

- For source current 0.3mA what will be the VOH Min Typical and Max

- Please mention worst case scenario as well

over 2 years ago

0 Clemens Ladisch over 2 years ago

Guru 243080 points

Use linear interpolation; see [FAQ] What is the output voltage (VOH or VOL) when the output current is X or the supply voltage is Y?

At 3 V, the worst-case output impedance is 50 Ω (the typical value is about half that). An output current of 0.3 mA results in a worst-case output voltage of 2.985 V.

Interface

Interface forum

TCA9535: Clarification on VOH level for 3.3 VDD