The MAX14780E is a +5.0V powered, ±30kV ESD protected RS-485/RS-422 transceiver with one driver and one receiver. The device includes fail-safe circuitry to ensure that the receiver output is logic-high when the receiver input is open or shorted. The receiver output is logic-high if all transmitters on the bus are disabled (high impedance). The MAX14780E features hot-swap capability to eliminate transient glitches on the bus during power-up or hot insertion. The MAX14780E features slew-rate limited drivers to reduce EMI and reflections caused by improperly matched cables, allowing error-free data transmission up to 500kbps. The MAX14780E is designed for half-duplex communication and draws 1.2mA of supply current under no load or full load conditions with the driver disabled. The MAX14780E has a 1/8 unit load input impedance and can accommodate up to 256 transceivers on the bus.
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