NCN5151: M-BUS Slave Transceiver

The NCN5151 is a single-chip integrated slave transceiver for use in 2-wire Meter Bus (M-BUS) slave devices and repeaters. The NCN5151 reuses the NCN5150 features and adds two lowpower modes: a 2-wire low power mode dedicated to System for meter Communication and Readout for powerless meters (SCR) and a 3-wire low power mode allowing support for wireless applications. When configured in low power mode, the transceiver will not behave anymore as a constant current source in order to save energy. When configured and used in M-BUS mode, the NCN5151 transceiver provides all of the functions needed to satisfy the European Standards EN 13757-2 and EN 1434-3 describing the physical layer requirements for M-BUS. It includes a programmable power level of up to 6 unit loads, which are available for use in external circuits through a 3.3 V LDO regulator.

Features
  • Single-chip M-BUS transceiver
  • 2 and 3-Wire Low Power Modes with Selection Input Pins
  • Integrated 3.3V VDD LDO Regulator with Extended Peak Current Capability of 15 mA
  • Supports Powering Slave Device from the Bus
  • Adjustable Constant Current Sink Up to 6 Units Load in M-Bus Mode
  • Adjustable Current Limit up to 2 Unit Loads in Low Power Mode
  • Current budget of 0.88 mA minimum for external circuits
  • Low turn ON/OFF Levels for Low Bus Voltage Operation
  • Polarity independant
  • Power-Fail function (M-BUS mode)
  • UART Communication speeds up to 38400 baud
  • Fast Startup - No External Transistor required on STC Pin
  • Industrial Ambient Temperature Range of -40C to +85C
  • These are Pb-free Devices
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Wired M-BUS Slave Transceiver with Low Power Mode SupportNCN5151/D (168kB)2
Package Drawings (1)
Document TitleDocument ID/SizeRevision
QFN20, 4x4, 0.5P485E (60.9kB)B
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCN5151MNTWGActivePb-free Halide freeQFN-20Contact BDTIC1Tape and Reel2500Contact BDTIC
Specifications
ProductData Transmission StandardData RateNumber of DriversNumber of ReceiversVCC Min (V)VCC Max (V)tPLH Max (µs)IO Max (µA)IIH Max (mA)
NCN5151MNTWGM-BUS38400 baud113.13.6
Wired M-BUS Slave Transceiver with Low Power Mode Support (168kB) NCN5151
QFN20, 4x4, 0.5P NCS5651