Overview
The NCN5121MNTWG, produced by onsemi, is a highly integrated receiver-transmitter IC designed for use in KNX twisted pair networks (KNX TP1-256). This component is essential for connecting various devices such as actuators, sensors, microcontrollers, and switches within a building network. It handles the transmission and reception of data on the bus and generates stabilized voltages from the unregulated bus voltage to power both the IC itself and external devices.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| KNX Transmitter Output Voltage (VTXO) | -0.3 | 45 | V | |
| KNX Transmitter Output Current (ITXO) | 250 | mA | ||
| Bus Voltage (VBUS1) | 20 | 33 | V | |
| Digital and Analog Supply Voltage (VDDD, VDDA) | 3.13 | 3.47 | V | |
| Input Voltage for DC-DC Converter (VIN) | VDD + 1 | 33 | V | |
| Bus Current Consumption (IBUS1) | 2.00 | 2.70 | mA | |
| Power Efficiency (DC Converter Only) | 90 | % | ||
| Thermal Warning Temperature (TTW) | 105 | 115 | 125 | °C |
| Thermal Shutdown Temperature (TTSD) | 130 | 140 | 150 | °C |
Key Features
- 9600 baud KNX communication speed
- Supervision of KNX bus voltage and current
- Supports bus current consumption up to 24 mA
- Generates stabilized voltages for internal and external device power
- Bus monitoring with power loss warning to the external microcontroller
- Adjustable DC-DC converter
- Fan-in control and impedance control
- Integrated PHY and MAC layers for data transmission and reception
Applications
The NCN5121MNTWG is designed for use in various building automation systems, including but not limited to:
- Actuators and sensors in KNX networks
- Microcontrollers and other control units
- Switches and other control devices
- Building automation systems requiring KNX protocol compliance
Q & A
- What is the primary function of the NCN5121MNTWG?
The NCN5121MNTWG is a receiver-transmitter IC for KNX twisted pair networks, handling data transmission and reception and generating stabilized voltages for internal and external devices. - What is the communication speed of the NCN5121MNTWG?
The communication speed is 9600 baud. - What is the range of the bus voltage (VBUS1) for the NCN5121MNTWG?
The bus voltage (VBUS1) ranges from 20 V to 33 V. - What are the thermal warning and shutdown temperatures for the NCN5121MNTWG?
The thermal warning temperature is between 105°C and 125°C, and the thermal shutdown temperature is between 130°C and 150°C. - Does the NCN5121MNTWG support external device power?
Yes, it generates stabilized voltages to power external devices. - What is the purpose of the bus monitoring feature?
The bus monitoring feature warns the external microcontroller in case of power loss to ensure critical data is saved. - What type of package does the NCN5121MNTWG come in?
The NCN5121MNTWG comes in a QFN-40-EP (6x6) package. - Is the NCN5121MNTWG RoHS compliant?
Yes, the NCN5121MNTWG is RoHS compliant. - What are the typical applications of the NCN5121MNTWG?
Typical applications include actuators, sensors, microcontrollers, switches, and other devices in KNX twisted pair networks. - Does the NCN5121MNTWG have integrated PHY and MAC layers?
Yes, it embeds both PHY and MAC layers for handling data transmission and reception.
