https://community.nxp.com/t5/Power-Management/PCA9450-I2C-3V3-level/m-p/1151993#M1154 <P>Can I use 3.3V level on SDA/SCL line instead of 1.8V as on yours reference design ?&nbsp;</P><P>In the datasheet , the limiting value is VSYS+ 0.5. But there is no information on maximum value. Is it the same ?</P><P>Thanks</P><P>Arnaud</P> Fri, 11 Sep 2020 07:37:12 GMT ArnOVDD 2020-09-11T07:37:12Z https://community.nxp.com/t5/Power-Management/PCA9450-I2C-3V3-level/m-p/1151993#M1154 <P>Can I use 3.3V level on SDA/SCL line instead of 1.8V as on yours reference design ?&nbsp;</P><P>In the datasheet , the limiting value is VSYS+ 0.5. But there is no information on maximum value. Is it the same ?</P><P>Thanks</P><P>Arnaud</P> Fri, 11 Sep 2020 07:37:12 GMT https://community.nxp.com/t5/Power-Management/PCA9450-I2C-3V3-level/m-p/1151993#M1154 ArnOVDD 2020-09-11T07:37:12Z https://community.nxp.com/t5/Power-Management/PCA9450-I2C-3V3-level/m-p/1152112#M1156 <P>Dear ArnOVDD,</P> <P>&nbsp;</P> <P><SPAN>Yes, you can connect SCL/SDA lines to 3.3V level instead of 1.8V.</SPAN></P> <P><SPAN>Please note, that you might need to increase the values of the pull-up resistors. Please refer to section 7.1 , page 55 of an UM10204 attached.</SPAN></P> <P>&nbsp;</P> <P><SPAN>With Best Regards,</SPAN></P> <P><SPAN>Jozef</SPAN></P> Fri, 11 Sep 2020 11:37:49 GMT https://community.nxp.com/t5/Power-Management/PCA9450-I2C-3V3-level/m-p/1152112#M1156 JozefKozon 2020-09-11T11:37:49Z