RS422 compatibility 5V/3.3V

Romain Pichonneau

Prodigy 70 points

Other Parts Discussed in Thread: AM26C31, AM26C32, AM26LV32E

Hello,

I would like to know if RS422 driver 5V is compatible with 3.3V receiver and vice versa.

(AM26C31 is compatible with AM26LV32C, and AM26LV31C is compatible with AM26C32)

Thanks in advance for any replies.

Best Regards

over 10 years ago

0 Ron Michallick over 10 years ago

TI__Guru**** 164796 points

Romain,

The RS422 ports are compatible.

0 Romain Pichonneau over 10 years ago in reply to Ron Michallick

Prodigy 70 points

Thank you Ronald,

But can I have more details please ?

I have to prove it is fully compatible, but in differential mode in I am lost with Voc and Vic values.

Best Regards,

Romain Pichonneau

0 Ron Michallick over 10 years ago in reply to Romain Pichonneau

TI__Guru**** 164796 points

Romain,

VOC is common mode voltage for out (driver) it is the average of Y and Z pin voltages.
VIC is common mode voltage for input (receiver) it is the average of A and B pin voltages.

I suggest using the AM26LV32E over the AM26LV32C.

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RS422 compatibility 5V/3.3V