MAX14857GWE+

MAX14857GWE+ is an isolated RS-485/RS-422 transceiver that provides 5000VRMS (60s) of galvanic isolation between the cable side (RS-485/RS-422 driver/receiver side) and the UART side of the device. Isolation improves communication by breaking ground loops and reduces noise when there are large differences in ground potential between ports. The device includes an integrated 450kHz transformer driver for power transfer to the cable side of the transceiver using an external transformer. An integrated LDO provides a simple and space-efficient architecture for providing power to the cable side of the IC. The device includes one drive channel and one receive channel. The receiver is a ¼-unit load, allowing up to 128 transceivers on a common bus. Integrated true fail-safe circuitry ensures a logic high on the receiver output when inputs are shorted or open. Applications include industrial automation equipment, programmable logic controllers, HV AC, and power meters.

• UL according to UL1577, cUL according to CSA bulletin 5A safety regulatory approvals
• High integration simplifies designs, integrated LDO for cable-side power
• Integrated transformer driver for power transfer to cable-side has up to 80% efficiency (150mA load)
• High-performance transceiver enables flexible designs
• Compliant with RS-485 EIA/TIA-485 standard, up to 128 devices on the bus
• Integrated protection for robust communication
• ±35kV ESD (HBM) on driver outputs/receiver i/ps, 5kVRMS withstand isolation voltage for 60sec (VISO)
• 1200VPEAK maximum repetitive peak isolation voltage (VIORM)
• Withstands ±10kV surge per IEC 61000-4-5, thermal shutdown
• 16 SOIC (W) package, -40°C to +105°C temperature range

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