Overview
The NCN5150DG, produced by onsemi, is a single-chip integrated slave transceiver designed for use in two-wire Meter Bus (M-BUS) slave devices and repeaters. This transceiver complies with the European Standards EN 13757-2 and EN 1434-3, which describe the physical layer requirements for M-BUS. It is particularly suited for multi-energy utility meters, including those for water, gas, electricity, and heating systems.
The device features a programmable power level, adjustable I/O levels, and an integrated 3.3V LDO regulator with extended peak current capability. It supports communication speeds up to 38,400 baud (half-duplex) and operates within an industrial ambient temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Junction Temperature (TJ) | -40 | 150 | °C | |
| Storage Temperature (TS) | -55 | 150 | °C | |
| Bus Voltage (|BUSL1 - BUSL2|) | -50 | 50 | V | |
| Voltage on Pin TX, TXI | -0.3 | 7.5 | V | |
| Voltage on Pin RX, RXI, VIO | -0.3 | 5.5 | V | |
| Ambient Temperature (TA) | -40 | 85 | °C | |
| UART Communication Speed | 38400 | baud | ||
| Integrated LDO Regulator Output Voltage | 3.1 | 3.6 | V | |
| Package Type | 16-pin SOIC, 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
- Extended current budget for external circuits: at least 0.88 mA
- Polarity independent
- Power-fail function
- Fast startup - no external transistor required on STC pin
- Industrial ambient temperature range of -40°C to +85°C
- Pb-free devices
Applications
- Multi-energy utility meters
- Water meters
- Gas meters
- Electricity meters
- Heating systems
Q & A
- What is the NCN5150DG used for?
The NCN5150DG is a single-chip integrated slave transceiver for use in two-wire Meter Bus (M-BUS) slave devices and repeaters.
- What communication speed does the NCN5150DG support?
The NCN5150DG supports UART communication speeds up to 38,400 baud (half-duplex).
- What are the package options for the NCN5150DG?
The NCN5150DG is available in 16-pin SOIC and 20-pin QFN packages.
- What is the operating temperature range of the NCN5150DG?
The NCN5150DG operates within an industrial ambient temperature range of -40°C to +85°C.
- Does the NCN5150DG support external power supply?
Yes, the NCN5150DG supports powering the slave device from the bus or from an external power supply.
- What is the function of the integrated 3.3V LDO regulator?
The integrated 3.3V LDO regulator provides a stable voltage output with an extended peak current capability of 15 mA.
- Is the NCN5150DG polarity independent?
Yes, the NCN5150DG is polarity independent.
- What is the power-fail function in the NCN5150DG?
The power-fail function indicates when the bus voltage falls below a certain threshold, triggering the PFb pin to go low.
- Does the NCN5150DG require an external transistor for startup?
No, the NCN5150DG does not require an external transistor for fast startup on the STC pin.
- Are the NCN5150DG devices Pb-free?
Yes, the NCN5150DG devices are Pb-free.
