/*** 2025 September latest disclaimers:
- KW47, MCX W72 are direct derivative from KW45 and MCX W71 - please bookmark this page for future update
- this article is for early enablement based on KW45, K32W148, MCX W71 and is pending updates up to wider releases of new KW47 and MCX W72 in December 2025.
-- Most of the design documents including Datasheet, Reference Manual and HW manufacturing files shared on request. For any design prior to the Mass Market Launch please contact your NXP local support. -- ***/
Please, find the important link to build a PCB using a KW47 or MCX W72 and all concerning the radio performances, low power and radio certification (CE/FCC/IC).
“As RF behavior are dependent of PCB layout & manufacturing; PCB prototypes (based on NXP recommendations) will have to be fine-tuned to insure the expected qualified in RF is reached on the final productized platform.”
KW47 product NXP web page: https://www.nxp.com/products/KW47
MCXW72 product NXP web page: https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mc...
KW-MCXW-EVK getting started NXP web page pending release of KW47/MCXW72
KW47-LOC getting started NXP web page pending release of KW47/MCXW72
MCXW72-LOC getting started NXP web page pending release of KW47/MCXW72
in addition of the product webpages please refer to KW47 Knowledge Hub
HARDWARE
KW47 MCX W72 EVK board: attached
KW47-MCXW72 LOCalization Channel Sounding board - diagram: preliminary attached
Do not used pre-production X-KW47LOC or MCXW72-LOC platform for Channel Sounding certification - contact NXP for further note
KW47-MCXW72-EVK HW guideline: Available on request
HVQFN48 package specification: SOT619-17(D) pending release of SOT619-17(DD)
KW47-MCXW72-EVK User Manual Available on request
Minimum BoM (attached file) >> KW45 - MCX W71 - KW47 - MCX W72 Minimum BoM Presentation Customers August25.pdf
DCDC management guide (AN13831) : KW45/K32W148 - Power Management Hardware (nxp.com) KW45 applicable for KW47 waiting release of KW47/...
Design-In check list: see attached file at the bottom of this article
RF matching: S parameters (attached file) Available on request
How to handle coincell application on PCB: AN14664_Coincell_Hardware_recommendation_Rev1.0.pdf
KW47-MCXW72 module can also be handled in standalone: How to run KW47-M2 standalone
RF output power level:
Please note it is expected that each final PCB platform, is refine with the right RF matching and filtering, to fit your market and region mandatory certification.
For instance the +10dBm at pin level can be exceeded in some configuration. It is final PCB owner responsibility to build a system (incl. all Rf path loss) with the expected target power level fitting with Bluetooth SiG Core spec and European radio certification target. Then the Tx power has to be adjusted at application level.
UFL SMA CABLE: On EVK, to connect M10 module for RF trials a µFL to SMA cable is recommended:
CSH-SGFB-200-UFFR TE Connectivity / Linx Technologies | Mouser France
On KW47-LOC or MCXW72-LOC to connect SMA specific connector has to be populated: TE Connectivity Ltd CONSMA021.062-G. Warning to solder SMA connector: please insure the PCB edge is well cut and right smooth; if not please mill a bit with a sand paper. (risk is to get SMA core line not well soldered on PCB line)
Also for higher Harmonics the µFL is not convenient as connector is limited above 6GHz (an SMA has to be soldered to control RF losses )
RF matching component tolerance:
Please note, on NXP EVK, FRDM and LOCalization platform the RF matching components (Inductors, Capacitors) are using the HIGH tolerance Muratasets. During your RF board tuning you may need to use low tolerance Murata set to insure all RF limits are passing.
Eg: GJM1555C1H3R3CB01D is +/-0.25pF tolerance where GJM1555C1H3R3BB01 with +/-0.1pF tolerance may be preferred
Eg2: LQG15HS1N3S02D is +/-0.3nH tolerance where LQG15HS1N3B02D with +/-0.1nH tolerance may be preferred
KW47 from KW45 hardware porting :
KW47 is pin to pin compatible with KW45. However from HW point of view, some components values will have to be adjusted like RF matching components values.
Other components around KW4x are not foreseen as to change based on current silicon validation.
Please also note some new muxing is in place to get new features of KW47 on pins. For instance on KW47 a second Flex CAN is available. See attached file
RADIO
RF report: KW45 and K32W148 RF System Evaluation Report for Bluetooth LE and K32W148 for 802.15.4 Applications ...KW47/MCXW72 - available ON DEMAND
Radio co-existence: Kinetis Wireless Family Products Bluetooth Low Energy Coexistence with Wi-Fi Application (nxp.com) p...
Compact Planar Antennas for 2.4 GHz Communication Designs and Applications within NXP EVK Boards
Antennas for Channel Sounding Applications
BLE connectivity test binary file: available in SDK on demand
Return loss (S11) measurement: How to measure the return loss of your RF matching (S11) part of the RF report (AN13728)
Loadpull: Available on request KW47/MCXW72
SW tools for RF trials:
IoT Tool box (mobile application)
Connectivity test tool for connectivity products (part of the IoT toolbox)
DTM: How to use the HCI_bb on Kinetis family products a... - NXP Community
CRYSTAL
Articles: KW47/MCX W72 32MHz & 32kHz Oscillation margins - NXP Community
