Overview
The NCN5150MNTWG is a single-chip integrated slave transceiver designed by onsemi for use in two-wire Meter Bus (M-BUS) slave devices and repeaters. This component complies with European Standards EN 13757-2 and EN 1434-3, which define the physical layer requirements for M-BUS. It is particularly suited for multi-energy utility meters, including water, gas, electricity, and heating systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Ambient Temperature Range | -40 | +85 | °C | |
| Bus Voltage (|BUSL1 - BUSL2|) | 9.2 | 42 | V | |
| UART Communication Speed | 300 | 38400 | baud | |
| Integrated 3.3 V VDD LDO Regulator | 3.3 | V | ||
| Peak Current Capability of LDO | 15 | mA | ||
| Constant Current Sink (Unit Loads) | 2 (SOIC) | 6 (QFN) | ||
| Thermal Resistance, Junction-to-Air (QFN20) | 42 | °C/W | ||
| Package Type | 20-pin QFN |
Key Features
- Single-chip M-BUS Transceiver
- UART Communication Speeds Up to 38,400 baud
- Integrated 3.3 V VDD LDO Regulator with Extended Peak Current Capability of 15 mA
- Supports Powering Slave Device from the Bus or from External Power Supply
- Adjustable I/O Levels
- Adjustable Constant Current Sink up to 2 or 6 Unit Loads Depending on the Package
- Low Bus Voltage Operation
- Polarity Independent Bus Connection
- Power-Fail Function with Early Warning
- Fast Startup – No External Transistor Required on STC Pin
- Thermal Shutdown Function
Applications
The NCN5150MNTWG is primarily used in multi-energy utility meters, including:
- Water meters
- Gas meters
- Electricity meters
- Heating systems
It is also suitable for other applications requiring M-BUS communication and power supply management.
Q & A
- What is the NCN5150MNTWG used for?
The NCN5150MNTWG is a single-chip integrated slave transceiver for use in two-wire Meter Bus (M-BUS) slave devices and repeaters.
- What are the supported UART communication speeds?
The NCN5150MNTWG supports UART communication speeds up to 38,400 baud.
- What is the operating temperature range of the NCN5150MNTWG?
The operating temperature range is from -40°C to +85°C.
- Does the NCN5150MNTWG support external power supply?
Yes, it supports powering the slave device from the bus or from an external power supply.
- What is the purpose of the integrated 3.3 V VDD LDO regulator?
The integrated 3.3 V VDD LDO regulator provides a stable voltage supply and can handle an extended peak current capability of 15 mA.
- Is the bus connection polarity independent?
Yes, the bus connection is fully polarity independent.
- What is the thermal resistance of the QFN20 package?
The thermal resistance, junction-to-air, for the QFN20 package is 42°C/W.
- Does the NCN5150MNTWG have a power-fail function?
Yes, it includes a power-fail function with an early warning to the microcontroller.
- What is the purpose of the thermal shutdown function?
The thermal shutdown function disables the transmitter when the junction temperature becomes too high, specifically during transmission of a space to the master.
- What are the typical applications of the NCN5150MNTWG?
Typical applications include multi-energy utility meters such as water, gas, electricity, and heating systems.
