Overview
The STKNX is a transceiver device designed for KNX TP (Twisted Pair) communication, developed by STMicroelectronics. This component is optimized for compact KNX node design due to its small package size and minimal external component requirements. The STKNX simplifies the interface to the microcontroller, allowing for easy replacement of physical layer discrete component implementations. It features integrated voltage regulators and a KNX bus power extractor, ensuring safe and efficient operation within KNX networks.
Key Specifications
| Parameter | Description |
|---|---|
| Package | Very thin fine pitch 4 x 4 mm VQFNPN24 package |
| KNX Certification | KNX certified, KNX TP1-256 supported |
| Voltage Regulators | Selectable 3.3 V / 5 V - 20 mA linear regulator and adjustable 1 V to 12 V - 150 mA high-efficiency DC/DC step down switching converter |
| KNX Bus Power Extractor | Supports bus current up to 30 mA, adjustable KNX bus current slew rate dI/dt |
| Operating Temperature | -40 °C to +85 °C |
| Crystal Requirement | No crystal required |
Key Features
- Very compact design with a small package size
- Easy interface to microcontroller for simplified integration
- Two integrated voltage regulators: selectable 3.3 V / 5 V linear regulator and adjustable 1 V to 12 V high-efficiency DC/DC step down switching converter
- KNX bus power extractor supporting bus current up to 30 mA
- Adjustable KNX bus current slew rate dI/dt
- No crystal required for operation
- Operating temperature range of -40 °C to +85 °C
- Ensures safe coupling to the bus and provides bus monitoring warning for loss of bus power
Applications
The STKNX is primarily used in KNX twisted pair networks (KNX TP1-256) for various applications, including:
- Building automation systems
- Smart home devices
- Industrial automation
- KNX-based control and monitoring systems
Q & A
- What is the STKNX used for?
The STKNX is a transceiver device for KNX TP communication, used in KNX twisted pair networks.
- What are the key features of the STKNX?
The STKNX features a compact design, easy microcontroller interface, two integrated voltage regulators, a KNX bus power extractor, and operates without a crystal.
- What are the voltage regulator options in the STKNX?
The STKNX includes a selectable 3.3 V / 5 V linear regulator and an adjustable 1 V to 12 V high-efficiency DC/DC step down switching converter.
- How does the STKNX handle KNX bus power?
The STKNX has a KNX bus power extractor that supports bus current up to 30 mA and adjusts the KNX bus current slew rate dI/dt.
- What is the operating temperature range of the STKNX?
The STKNX operates within a temperature range of -40 °C to +85 °C.
- Does the STKNX require a crystal for operation?
No, the STKNX does not require a crystal for operation.
- How does the STKNX ensure safe bus coupling?
The STKNX ensures safe coupling to the bus and provides a bus monitoring warning for the loss of bus power.
- What are some typical applications of the STKNX?
The STKNX is used in building automation systems, smart home devices, industrial automation, and other KNX-based control and monitoring systems.
- Is the STKNX compatible with KNX standards?
Yes, the STKNX is KNX certified and supports the KNX TP1-256 standard.
- What development tools are available for the STKNX?
The STKNX is supported by the STSW-KITSTKNX demonstration firmware and the STM32CubeIDE development environment.
