MAX14945EWE+

MAX14945EWE+ is an isolated RS-485/RS-422 transceiver that provides 2750VRMS (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. Signals are passed across the isolation barrier through integrated high-voltage capacitors. The device includes one half-duplex drive/receive channel. The receiver is a 1/8-unit load, allowing up to 256 transceivers on a common bus. Integrated true fail-safe circuitry ensures a logic high on the receiver output when inputs are shorted or open. Undervoltage lockout disables the driver when the cable side or UART side power supplies are below functional levels. 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-performance transceiver enables flexible designs
• Integrated LDO for cable-side power
• Integrated protection ensures robust communication
• > 30 years lifetime at rated working voltage
• Withstands ±10kV surge per IEC 61000-4-5, thermal shutdown
• 630VPEAK maximum repetitive peak-isolation voltage (VIORM)
• Supply voltage range from 1.71 to 5.5V
• Common mode transient immunity is 35kV/μs typ at TA=+25°C
• 16 SOIC (W) package, -40°C to +85°C temperature range

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