Communication interface chip UART485/232

5V, 4:1, 2-Channel Analog Multiplexer 16-SOIC -40 to 85

The NCN5151 is a single-chip, integrated slave transceiver for two-wire meter bus (M-BUS) slaves and repeaters.The NCN5151 reuses the functionality of the NCN5150 and adds two low-power modes: a 2-wire, low-power mode dedicated to meter communication systems and meter-less (SCR) readouts, and a 3-wire, low-power mode to support wireless applications. When configured in low-power mode, the transceiver will no longer act as a constant current source in order to save energy. When configured and used in M-BUS mode, the NCN5151 transceiver provides all the functionality needed to meet the European standards EN 13757-2 and EN 1434-3, which define the requirements for the M-BUS physical layer. It includes programmable power levels up to 6 unit loads and can be used for external circuits via a 3.3 V LDO regulator.