I don't see any ESD specifications for AMD4850ARMZ. Is there any ESD protection available for this IC or do i need to use an external ESD protection diodes to use this?
Just an extra note -- ADI also has a range of more ESD robust RS-485 transceivers at 3V and 5V operation:
5 V operation:
ADM485E, ADM487E, ADM1487E have 15 kV HBM ESD protection
3 V operation:
ADM3070E - ADM3078E have 15 kV HBM ESD protection