MAX3158CAI+

MAX3158CAI+ is a high CMRR RS-485 transceiver with ±60V isolation. It is a high CMRR RS-485/RS-422 data-communications interface providing ±60V isolation in a hybrid microcircuit. A single +5V supply on the logic side powers both sides of the interface, with external 100V capacitors transferring power from the logic side to the isolated side. The MAX3158 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 fail-safe feature that guarantees a logic-high receiver output if the inputs are open, shorted, or connected to a terminated transmission line with all drivers disabled. Applications include industrial controls, telecommunications, level translators, and local area networks.

• 5V single supply
• Low-cost replacement for opto-isolated transceivers
• True fail-safe receiver while maintaining EIA/TIA-485 compliance
• Phase controls to correct for twisted-pair reversal
• Thermal shutdown for driver overload protection
• Slew-rate-limited reduced EMI
• Differential driver output (no load) is 6V max at R=10Mohm
• Supply current in shutdown mode is 25µA typ at DE=GND, active-low RE=VCC, VISOCOM=GND
• 28 SSOP package
• 0°C to +70°C operating temperature range

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