2054641_en-US

SC18IS604 5V tolerant I/O pins

Hello NXP,

I am currently designing a circuit using the SC18IS604. After reading its datasheet, I couldn’t determine which I/O pins are 5V tolerant. I’m sorry to bother you, but I would like to ask the following questions.

1. When the GPIO pins of the SC18IS604 are configured as input-only, are they 5V tolerant?
2. Are the SDA and SCL lines input/output tolerant? If VDD is 3.3V, is it possible to pull up the I2C-bus to 5V?

Best regards,

Yuichiro

Re: SC18IS604 5V tolerant I/O pins

Hello Tomas,

Thank you so much for your quick reply.
I now understand the specifications clearly.

Best regards,
Yuichiro

Re: SC18IS604 5V tolerant I/O pins

Hello Yuichiro,

1. Yes.
2. SCL, SDA pins are not 5V tolerant. These pins should not be pulled up to more than VDD.

BRs, Tomas