AnsweredAssumed Answered

Input pin voltage tolerance on ADT7470

Question asked by gavint on Nov 30, 2015
Latest reply on Feb 22, 2016 by KarenNE



We are using the following part in an existing design:



I would like to get clarity as to what is the maximum input voltage that the ADT7470 device is able to withstand on the SCL/SDA lines.


In the "Absolute Maximum Ratings" table in the datasheet, it specifies the following:

Voltage on Any Input or Output Pin: –0.3 V to VCC + 0.3 V

This would give a maximum input voltage of +3.6V.


However, on page 3 and 4 of the datasheet there is a note 4 which stipulates:

4 Logic inputs accept input high voltages up to 5 V even when the device is operating at supply voltages below 5 V.


I am not sure based on this what the maximum allowable input voltage is for SCL/SDA.


Many thanks.