20 Mbps half-duplex RS-485 transceiver in an 8-MSOP package
The Analog Devices LTC2856IMS8-1#PBF is a half-duplex RS-422/RS-485 transceiver delivering 20 Mbps data rate over a single differential pair.
Supply rail and bus voltage tolerance
The RS-485 bus pins are specified for the full common-mode range of -7V to +12V per the protocol, but the datasheet's absolute maximum ratings (not reproduced here) define the survival limits — assume the wiring is wrong and plan external protection if the cable leaves the cabinet.