STKNX

The STKNX is a transceiver device for KNX TP communication. The small package and few external components enable the very compact KNX nodes design.

The simple interface to the μC allows easy replacement of physical layer discrete components implementations.

The STKNX device features two integrated voltage regulators for external use in the application: the selectable 3.3 V / 5 V - 20 mA linear regulator and the adjustable 1 V to 12 V - 150 mA high-efficiency DC/DC step down switching converter.

The integrated KNX bus power extractor supports bus current up to 30 mA to power external devices and the STKNX transceiver's own power needs, while limiting the bus current slew rate according to KNX specifications.

The STKNX assures the safe coupling to the bus and provides the bus monitoring warning for the loss of bus power.

Key Features

Very thin fine pitch 4 x 4 mm VQFNPN24 package
KNX certified, KNX TP1-256 supported
Easy interface to μC
Very small system solution
Two integrated voltage regulators for external use in application
- Selectable 3.3 V / 5 V - 20 mA linear regulator
- Adjustable 1 V to 12 V - 150 mA 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
Operating temperature range -40 °C to +85 °C

Resources

Technical Documentation

Product Specifications

	Description	Version	Size
	DS12399: Miniature KNX transceiver with voltage regulators and microcontroller support	1.0	970 KB

User Manuals

	Description	Version	Size
	UM2409: Quick start guide STKNX evaluation board (EVALKITSTKNX)	1.0	2 MB

Publications and Collaterals

Flyers

	Description	Version	Size
	Tiny, efficient KNX bit transceiver for home and building control	1.0	1 MB

Brochures

	Description	Version	Size
	Electric vehicle (EV) ecosystem	1.1	1 MB

Tools and Software

Evaluation Tools

Solution Evaluation Tools

Part Number	Manufacturer	Description
EVALKITSTKNX	ST	Miniature transceiver STKNX evaluation and development kit

Sample & Buy

Part Number	Package	Packing Type	Marketing Status	Unit Price (US$) *	Quantity	ECCN (US)	Country of Origin	More info	Order from ST	Order from Distributors
STKNX	QFN-24L	Tray	Active : Product is in volume production	2.0059	1000	EAR99	PHILIPPINES	MORE INFO		DISTRIBUTOR AVAILABILITY
STKNXTR	QFN-24L	Tape And Reel	Active : Product is in volume production	2.0059	1000	EAR99	PHILIPPINES	MORE INFO	Free Sample Add to cart	DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors

Quality & Reliability

Part Number	Marketing Status	Package	Grade	RoHS Compliance Grade	Material Declaration**
STKNX	Active	QFN-24L	Industrial	Ecopack2
STKNXTR	Active	QFN-24L	Industrial	Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.