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MAX3157 - High CMRR RS-485 Transceiver

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.

Key Features

  • independently programmable receiver and transmitter output phase through separate pins. The MAX3157 is a low-cost replacement for opto-isolated transceivers. For fully isolated RS-485/RS-422 transceivers, refer to the MAX1480 family data sheet. o ±50V Isolated Data Interface o +5V Single Supply o Low-Cost Replacement for Opto-Isolated Transceivers o True Fail-Safe Receiver While Maintaining EIA/TIA-485 Compliance o Pin-Selectable Full/Half-Duplex Operation o Phase Controls to Correct for Twisted.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.