19-1778; Rev 3; 11/01 High CMRR RS-485 Transceiver with ±50V Isolation General Description The MAX3157 is a high CMRR RS-485/RS-422 data-communications interface providing ±50V isolation in a hybrid microcircuit.
A single +5V supply on the logic side powers both sides of the interface, with external ±50V capacitors transferring power from the logic side to the isolated side.
Each MAX3157 contains one transmitter and one receiver and is guaranteed to operate at data rates up to 250kbps.
Drivers are short-circuit current limited and protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state.
The receiver input has a f...

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