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Hi, 
 I am writing in reference to ask for confirmation on the maximum values that the 'Rin' pins in these devices can withstand because for the project I am working on I would need them to withstand a voltage of +-32V for an indefinite time. I would also like to ask if Analog have internally isolated transceivers for RS-232 that will withstand +-32 volts or more, and the same question for RS-422/485 transceivers that are internally isolated and will withstand +-32 volts or more. 
 The devices part numbers that I am interested on getting this information are 'ADM3315EARUZ-REEL7' and ' ADM101EARMZ '

ShastaThomas · Accepted Answer

Hello, 
 Thank you for your inquiry. I would be happy to help you. 
 The maximum rating for the RIN pins on both the ADM3315E and ADM101E is +/-30V. Unfortunately, I was not able to find any isolated RS-232 transceivers with RIN ratings greater than +/-30V. We have only one device that meets your voltage withstand requirements and that is the MAX13223E. 
 For RS-485: only one isolated transceiver features a maximum rating above +/-32V for the bus IOs, and that is the ADM2795E. Please take a look and verify if this device meets your other needs (e.g. supply voltage, data rate, isolation rating). We have a number of non-isolated RS-485 transceivers with maximum ratings above +/-30V, but they would need to be used with an isolator, if isolation is needed. 
 Thank you, 
 Shasta)

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