MAX14780E ESD-Protected RS-485/RS-422 Receiver

The MAX14780E +5.0 V powered, ±30kV ESD protected RS-485/RS-422 transceiver features a driver and a receiver. The device includes fail-safe circuitry that guarantees a logic-high receiver output when the receiver inputs are open or shorted. The receiver outputs are logic-high if all transmitters on the bus are disabled (high impedance) during termination. The MAX14780E includes a hot-swap capability that eliminates spurious bus transitions during power-up or hot-insertion.

The MAX14780E features slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, enabling error-free data transmission up to 500kbps. The MAX14780E is ideal for half-duplex communications; it draws 1.2mA of supply current at no load or with the drivers fully disabled. The MAX14780E has a 1/8-unit load receiver input impedance, allowing up to 256 bus transceivers.

The MAX14780E is available in an 8-pin SO package

Key Features

+5.0 V Operation

Enhanced ESD protection for RS-485/RS-422 I/O pins ±30kV Human Body Model

True fail-safe reception maintains EIA/TIA-485 compliance

Hot-swappable input structure for DE and active low Reynolds number

Enhanced slew-rate limiting facilitates error-free data transmission

Low Current Shutdown Mode

Allows up to 256 transceiver buses

Available in industry standard 8-pin SO package