MAX3157EAI+

The MAX3157EAI+ is a high CMRR RS485 transceiver with ±50V isolation in 28 pin SSOP package. The high CMRR RS485/RS422 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 operates at a 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 has a logic high receiver output if the inputs are open, shorted or connected to a terminated transmission line with all drivers disabled.

• Supply voltage range is 4.75V to 5.25V
• Operating temperature range from -40°C to 85°C
• Low cost replacement for opto-isolated transceivers
• True fail safe receiver while maintaining EIA/TIA485 compliance
• Pin selectable full/half duplex operation
• Phase controls to correct for twisted pair reversal
• Low power shutdown mode reduces supply current to 25μA
• 25mA of supply current when unloaded or when fully loaded with the driver disabled
• Slew rate limited reduced EMI

Applications

Communications & Networking, Industrial

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party