I have a single wire based communication bus which handle both rx/tx communication at 5v. I've tied this directly to the MCU input and placed TVS diodes to help under and over voltage protection. This is a bus that gets exposed to the outside world and while being used in the field it has come into contact to 12v on the bus and a high current run, which intern blows my TVS diodes and then pops my MCU.
Does anybody know a circuit to handle over voltage protection on this type of circuit which can with stand 12v. I've tried to find some kind of transceivers which mimic my bus network, but have not found any.
I imagine this is probably a common circuit and hope someone can point me in the right direction.
Thanks in advance,
Jason
Does anybody know a circuit to handle over voltage protection on this type of circuit which can with stand 12v. I've tried to find some kind of transceivers which mimic my bus network, but have not found any.
I imagine this is probably a common circuit and hope someone can point me in the right direction.
Thanks in advance,
Jason