M-BUS 从属收发器

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概览

NCN5151 是一款单芯片集成式从收发器,适用于两线仪表总线 (M-BUS) 从属器件和中继器。NCN5151 重新使用了 NCN5150 的功能,并增加了两种低功耗模式:专用于电表通信系统和无电表 (SCR) 读数的 2 线低功耗模式,以及支持无线应用的 3 线低功耗模式。当在低功耗模式下配置时,收发器将不再充当恒定电流源,以便节省能耗。当配置并以 M-BUS 模式使用时,NCN5151 收发器提供满足规定 M-BUS 物理层要求的欧洲标准 EN 13757-2 和 EN 1434-3 所需的所有功能。它包括了高达 6 个单位负载的可编程功率水平,可通过 3.3 V LDO 稳压器用于外部电路。

  • Multi-energy utility meters:
    - Water
    - Gas
    - Electricity
    - Heating systems

  • 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 independent
  • 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

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NCN5151MNTWG

Last Shipments

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Pb

A

H

P

QFN-20

1

260

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2500

Y

M-BUS

38400 baud

1

1

3.1

3.6

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