2385744_en-US

Connect FPGA to port B of PCA9617A

Hi:

My situation is as follows: the MCU is connected to port A of a PCA9617A, and the FPGA (as an I²C device) is connected to port B.

According to the datasheet, the voltage bias of port B is approximately 0.55 V. The FPGA's VIL specification is 0.8 V. This leaves only a 250 mV margin.

Will this margin cause problems when transferring large amounts of data from the MCU to the FPGA? What is the recommended VIL margin for reliable operation?

Best regards

Marco

Re: Connect FPGA to port B of PCA9617A

Hello Marco_MJ

Good day!

I believe you're at the limit; the recommended range is >300mV, so you're running a significant risk with that 250mV range.

I hope this information has helped you, please let me know if you need help with anything else.

Have a great day and best of luck.