Arm® Cortex®-M0+|Kinetis® KW41Z 2.4 GHz Bluetooth Low Energy Thread Zigbee Radio MCUs

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Note: K32W061/41 is preferred for any new Zigbee^®, Thread and Bluetooth^® LE 5.0 design. No new software releases planned

The KW41Z is an ultra-low-power, highly-integrated single-chip device that enables Bluetooth^® Low Energy v4.2 and IEEE^® 802.15.4 RF connectivity for portable, extremely low-power embedded systems. Applications include portable healthcare devices, wearable sports and fitness devices, AV remote controls, computer keyboards and mice, gaming controllers, access control security systems, smart energy, and home area networks.

The KW41Z MCU integrates a 2.4 GHz transceiver supporting FSK/GFSK and O-QPSK modulations, an Arm^® Cortex^®-M0+ CPU, up to 512 KB Flash and up to 128 KB SRAM, 802.15.4 packet processor, hardware security and peripherals optimized to meet the requirements of the target applications.

The KW41Z is an ideal solution for true single-chip designs that require concurrent communication on both a Bluetooth Low Energy network and an 802.15.4 based network such as Thread and Zigbee. This multi-mode capability enables direct communication using Bluetooth Low Energy via a mobile device and participating in a mesh network for local and remote control/monitoring.

The Bluetooth^® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by NXP^® Semiconductors is under license.

Data Sheet

Reference Manual

Product Details

Block Diagram

Kinetis^® W Series KW40Z MCUs Block Diagram

Get diagram PDF

Features

Multi-Protocol Radio

2.4 GHz Bluetooth Low Energy version 4.2 Compliant
IEEE Std. 802.15.4 Standard Compliant
Typical Receiver Sensitivity (Bluetooth Low Energy) = -95 dBm
Typical Receiver Sensitivity (802.15.4) = -100 dBm
Programmable Transmitter Output Power up to +3.5 dBm

Core and Memories

Up to 48 MHz Arm^® Cortex^®-M0+ core
Up to 512 KB Flash memory
Up to 128 KB SRAM
Excellent coexistence performance
Integrated balun to reduce system cost and PCB board area

Low Power Consumption and Operating Voltage Ranges

Nine low-power modes to provide power optimization based on application requirements
Typical Rx/Tx Current (DC/DC Enabled): 6.5 mA / 8.4 mA
Typical Rx/Tx Current (DC/DC Enabled): 6.8/6.1 mA
Bypass Voltage: 1.71V to 3.6V
DCDC Converter Buck Configuration: 2.1V to 4.2V
DCDC Converter Boost Configuration: 0.9V to 1.795V

Analog modules

16-bit Analog-to-Digital Converter (ADC)
12-bit Digital-to-Analog Converter (DAC)
6-bit High Speed Analog Comparator (CMP)

Security

AES-128 Accelerator (AESA), True Random Number Generator (TRNG)

Supported Software

Bluetooth Low Energy Host Stack and Profiles
Generic FSK Link Layer Software
Thread
Thread + Bluetooth Low Energy Stack
Zigbee 3.0
Zigbee 3.0 + Bluetooth Low Energy Stack
Kinetis^® Software Development Kit (SDK)
FreeRTOS kernel and a bare-metal non-preemptive task scheduler
Support for MCUXpresso and IAR

Comparison Table

Kinetis KW41Z Family Solutions

Part Number	Wireless Connectivity Protocol	Memory	Package Size	Hardware Development Tool
MKW41Z512VHT4	Bluetooth Low Energy and IEEE 802.15.4	512 KB Flash, 128 KB RAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN	FRDM-KW41Z USB-KW41Z
MKW41Z256VHT4		256 KB Flash, 64 KB SRAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN
MKW41Z512CAT4R		512 KB Flash, 128 KB RAM	3.9 mm x 3.8 mm 75-pin WLCSP
MKW31Z512VHT4	Bluetooth Low Energy	512 KB Flash, 128 KB RAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN
MKW31Z256VHT4		256 KB Flash, 64 KB SRAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN
MKW31Z512CAT4R		512 KB Flash, 128 KB RAM	3.9 mm x 3.8 mm 75-pin WLCSP
MKW21Z512VHT4	IEEE 802.15.4	512 KB Flash, 128 KB RAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN
MKW21Z256VHT4	IEEE 802.15.4	256 KB Flash, 64 KB SRAM	7 mm x 7 mm x 1 mm 48-pin Laminate QFN

MCUXpresso Software and Tools

Protocol Stacks

Connectivity Software

MCUXpresso SDK for KW41Z includes the following components:

KW41Z Bluetooth^® low energy v4.2 stack, v1.2.8
KW41Z Thread^® stack v1.2.8
KW41Z Zigbee^® stack, v6.0.9
KW41Z IEEE^® 802.15.4-2006/2011 MAC/PHY implementation v5.3.8
KW41Z Generic FSK link layer software v1.0.7
KW41Z Simple Media Access Controller (SMAC) v3.3.7
KW41Z-enabled Connectivity Framework v5.3.8

NXP Designs: Reference Design Library

Technical content and expertise to help jump-start your design and get you to production faster.

Design Files

1 design file

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^{Design Files - miscellaneous}
KW41Z/31Z/21Z Design in check-list

XLSXRev 1Nov 21, 201795.3 KBKW41Z-31Z-21Z-DESIGN-CHECK
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Hardware

1-5 of 12 hardware offerings

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^{Evaluation and Development Boards}
Freedom Development Kit for Kinetis^® KW41Z/31Z/21Z MCUsFeatured

FRDM-KW41Z
^{Emulators, Probes, and Programmers}
LPC-Link2

OM13054
^{Emulators, Probes, and Programmers}
Universal Multilink FX High-Speed Development Interface

U-MULTILINK-FX
Additional hardware available. View our featured partner solutions.
^{Emulators, Probes, and Programmers}
PEmicro Cyclone programmer

CYCLONE
^{Emulators, Probes, and Programmers}
PEmicro Cyclone FX programmer

CYCLONE-FX
^{Evaluation and Development Boards}
Bluetooth Low Energy/IEEE^® 802.15.4 Packet Sniffer/USB Dongle

USB-KW41Z
^Designs
Layerscape LS1012A Smart Home Gateway Reference Design

SMART-HOME-GATEWAY
^Designs
Two-Phase Power Meter Reference Design

TWO-PHASE-POWER-METER
^Designs
Three-Phase Power Meter Reference Design

THREE-PHASE-POWER-METER
^Designs
NXP^® Rapid IoT Prototyping Kit

IOT-PROTOTYPING
^Designs
KW41Z Power Amplifier Reference Design

KW41Z-PA-RD
^Designs
IoT Gateway Solution

IOT-GATEWAY-SOLUTION

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