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Part Number: ISO7341C
ISO7341C will be used between PSE(TPS23861) and MCU for I2C interface. Can you please review below schematic?
-. Does it need pull up resistor on I2C line?
-. ISO7341C port is open drain or push pull?
The schematic looks fine. Just a one comment.
Although the EN can be left floating, I would still recommend tying EN1 to VCC1 and EN2 to VCC2 using 4.7k resistors, instead of leaving them floating as in the schematic. This would help improve the EMI/EMC performance of the system.
I am not sure why the bidirectional I2C communication is implemented using a digital isolator in this system. Could you please clarify?We have an isolated I2C device which can be used directly without any additional circuitry. ISO1540 / ISO1541. Any reason this is not considered for this application?
Regarding your other concerns, I would recommend taking a look at the app note Designing I2C using Digital Isolator. This should explain the circuitry required when using a digital isolator as an I2C.ISO7341C is push pull architecture output.
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In reply to Anand Reghunathan:
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