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NXP Semiconductors K32W041Z
- Part No.:
- K32W041Z
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
K32W041Z.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:829
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Product details
Overview
K32W041Z from NXP Semiconductors is an ultra-low-power Arm® Cortex®-M4 wireless microcontroller supporting Bluetooth Low Energy 5.0 and IEEE 802.15.4 (Zigbee 3.0/Thread) protocols, operating at up to 48 MHz with 640 KB Flash and 152 KB SRAM. It integrates a 2.4 GHz transceiver, 12-bit ADC (8-channel), dual PDM microphone interface, and hardware AES-128/256 security engine - enabling coin-cell-powered smart locks and sensor nodes.
For engineers reviewing the K32W041Z datasheet, K32W041Z pinout, K32W041Z application, or K32W041Z equivalent, this page delivers verified technical context, validated pin functions, confirmed low-power modes (350 nA deep power-down), exact peripheral counts (2×I²C, 2×SPI, 2×USART, 10×PWM), and real-world substitution guidance for home automation and building control designs.
Technical Context
The K32W041Z implements a dual-radio architecture with independent IEEE 802.15.4 and Bluetooth LE 5.0 transceivers sharing a single 2.4 GHz RF front-end, supported by integrated RF balun and antenna diversity control (ADE/ADO pins). Its Arm Cortex-M4 core includes MPU, NVIC, SWD debug, and a dedicated low-power timer synchronized to the BLE link layer for timing-critical sleep/wake cycles.
Power management integrates a DC/DC converter (VBAT input, LX filter, FB feedback), three voltage domains (VDD(RADIO), VDD(PMU), VDDE), and four low-power states - including deep power-down (350 nA) with wake-up capability via GPIOs, I²C, USART, SPI, or low-power timers clocked by 32.768 kHz XTAL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 @ up to 48 MHz - enables real-time protocol stack execution with deterministic interrupt latency |
| Memory | 640 KB Flash / 152 KB SRAM - supports OTA firmware updates and concurrent Zigbee/Thread/BLE application + stack memory footprint |
| Wireless Standards | Bluetooth LE 5.0 (2 Mb/s) + IEEE 802.15.4-2011 - dual-stack operation without external coexistence circuitry |
| RF Performance | +10 dBm TX @ 20.3 mA / –97 dBm BLE RX sensitivity - enables robust 10–30 m indoor range with coin-cell battery life >1 year |
| Low-Power Modes | Deep power-down current = 350 nA with IO wake-up - extends battery life in motion-sensor or door-lock applications |
| Analog Peripherals | 8-channel 12-bit ADC @ 190 kS/s + dual PDM mic interface with hardware voice activity detector - reduces MCU load in voice-enabled edge devices |
| Security | Hardware AES-128/192/256 + SHA-1/SHA-256 accelerators + eFuse key storage - meets Zigbee 3.0 and Thread 1.1 secure boot requirements |
Pinout & Package
HVQFN40 package (6 × 6 mm, 0.5 mm pitch), lead-free and RoHS compliant; junction temperature range –40 °C to +125 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF_IO | RF Transceiver Antenna Interface | Single-pin 2.4 GHz RF I/O connection requiring external matching network; supports antenna diversity via ADE/ADO control |
| XTAL_P / XTAL_N | 32 MHz Crystal Oscillator Input | Differential crystal connection for main system clock; internal capacitors eliminate need for external load caps |
| XTAL_32K_P / XTAL_32K_N | 32.768 kHz RTC Crystal Input | Enables precise timekeeping and BLE advertising interval timing during deep-sleep modes |
| VDD(RADIO) / VSS(RF) | RF Power Supply & Ground | Isolated analog power domain for transceiver; requires separate PCB ground plane and decoupling |
| PIO0–PIO21 | Configurable Digital I/O | 22 GPIOs with multiple alternate functions (PWM, UART, SPI, I²C, ADC inputs, comparator inputs); 4 support pin-interrupt |
| VDDE | IO Voltage Supply | Supplies 1.8–3.6 V to digital I/O banks; independent of VDD(PMU) and VDD(RADIO) for flexible level-shifting |
| RSTN | Active-Low Reset Input | Asynchronous reset pin; must be held low ≥100 ns for reliable device initialization |
| SWCLK / SWDIO | Serial Wire Debug Interface | Two-pin JTAG/SWD interface for programming and real-time debugging; supports breakpoints and watchpoints |
Key Features
| Feature | Design Value |
|---|---|
| Dual-protocol radio subsystem | Integrated BLE 5.0 + IEEE 802.15.4 transceivers share RF front-end and baseband logic - eliminates need for external RF switch or dual-chip design |
| Ultra-low-power sleep architecture | 350 nA deep power-down with GPIO wake-up and 32.768 kHz timer retention - enables >5-year coin-cell operation in occupancy sensors |
| Hardware-accelerated security | AES-128/256 + SHA-256 engines plus eFuse-stored keys - offloads encryption from CPU and prevents key extraction via side-channel attacks |
| Digital audio pre-processing | Dual-channel PDM interface with hardware voice activity detection (VAD) and 16-entry FIFO - reduces host CPU load by >70% in voice-triggered smart lighting |
| Flexible clocking system | Three independent oscillators (32 MHz XTAL, 32.768 kHz XTAL, FRO) feeding multiple clock domains - ensures precise timing for BLE advertising, RTC, and audio sampling simultaneously |
Applications
| Smart Lock Control | Occupancy Sensor Node |
|---|---|
Use Scenario: Battery-powered electronic deadbolt with BLE provisioning and Zigbee mesh reporting. IC Role / Device Role / Timing Role: Primary wireless MCU executing BLE Secure Connection pairing, Zigbee Green Power commissioning, and local tamper-detection logic. Use Value: Deep power-down (350 nA) extends CR2450 battery life beyond 3 years; hardware AES ensures FIPS-compliant key exchange during over-the-air updates. |
Use Scenario: Wall-mounted PIR + ambient light sensor node transmitting occupancy status every 30 s via Thread network. IC Role / Device Role / Timing Role: System-on-chip managing analog sensor conditioning, BLE advertising for commissioning, and Thread end-device routing. Use Value: Integrated 12-bit ADC and low-power timers enable accurate light-level measurement and scheduled wake-up - eliminating external timing ICs and reducing BOM count by 2 components. |
| Smart Lighting Gateway | Thermostat Edge Controller |
Use Scenario: BLE-to-Thread bridge in LED driver modules enabling smartphone control and whole-home automation interoperability. IC Role / Device Role / Timing Role: Dual-stack coordinator handling BLE GATT services for mobile apps and Thread network layer for mesh forwarding. Use Value: Shared radio baseband and memory architecture allows concurrent BLE connection (8 devices) and Thread child table management - no performance penalty during firmware updates. |
Use Scenario: HVAC thermostat with local temperature sensing, display driving, and wireless communication to cloud gateway. IC Role / Device Role / Timing Role: Main controller running RTOS, reading onboard temperature sensor and battery voltage, managing display refresh, and maintaining BLE connection. Use Value: On-chip temperature sensor and battery monitor reduce external component count; 152 KB SRAM accommodates both Zephyr OS and proprietary HVAC control algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFR32MG21A020F768IM32 | 2.4 GHz + sub-GHz dual-band radio; 768 KB Flash / 96 KB RAM; no integrated PDM mic interface | Better suited for hybrid 2.4 GHz + 868/915 MHz deployments; lacks hardware VAD and DMIC subsystem | Select when sub-GHz long-range coverage is required and audio preprocessing is handled externally |
| nRF52840-QIAA | BLE 5.0 + IEEE 802.15.4 capable; 1 MB Flash / 256 KB RAM; no hardware AES-256 or SHA-256 accelerator | Higher memory headroom for complex Matter-over-Thread stacks; relies on software crypto for SHA-256 | Prefer when Matter certification is mandatory and cryptographic throughput is not latency-critical |
Compared with EFR32MG21A020F768IM32 and nRF52840-QIAA, the K32W041Z uniquely combines BLE 5.0 + 802.15.4 dual-stack, hardware VAD, and 350 nA deep power-down in a single HVQFN40 package - delivering lowest BOM cost and longest battery life for Zigbee/Thread endpoint devices.
Availability
K32W041Z is available at Aetrix Electronics and suitable for smart lock control, occupancy sensor nodes, smart lighting gateways, and thermostat edge controllers requiring stable component supply across industrial and consumer IoT production programs.
Supply support for K32W041Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with over 30 years of embedded systems expertise.
The K32W series targets ultra-low-power wireless edge devices for home/building automation, designed to integrate protocol stacks, security, and sensor processing in a single chip - reducing system complexity and certification effort.
FAQ
What wireless protocols does the K32W041Z natively support?
The K32W041Z natively supports Bluetooth Low Energy 5.0 (including 2 Mb/s mode) and IEEE 802.15.4-2011, enabling full Zigbee 3.0 and Thread 1.1 stack implementation. It does not support proprietary 2.4 GHz protocols or sub-GHz bands. The K32W041Z achieves this through a shared RF front-end and dual-baseband processor - allowing concurrent or time-sliced operation without external RF switches.
Does the K32W041Z include NFC functionality like the K32W061?
No, the K32W041Z does not include the integrated NTAG I²C NFC Forum Type 2 tag present in the K32W061. Pin positions LA and LB on the HVQFN40 package are marked "n.c." (no connect) in K32W041Z documentation. This omission reduces cost and silicon area while retaining identical RF, MCU, and peripheral capabilities for applications where NFC provisioning is unnecessary.
What is the minimum supply voltage required for full K32W041Z operation?
The K32W041Z operates across a 1.9 V to 3.6 V supply range. At 1.9 V, all peripherals (including radio RX/TX, ADC, and DMA) function per specification, though maximum CPU frequency is limited to 24 MHz. For full 48 MHz operation and +10 dBm transmit power, ≥2.7 V is required. The K32W041Z's DC/DC converter maintains efficiency down to 1.9 V input, enabling direct CR2032 use.
How many ADC channels does the K32W041Z support, and what is their resolution?
The K32W041Z integrates a single 12-bit successive-approximation ADC with 8 input channels (ADC0–ADC5 plus two auxiliary inputs). It supports up to 190 ksamples/s in continuous mode with hardware-triggered conversions and DMA-linked data transfer - eliminating CPU polling overhead. The K32W041Z ADC includes built-in calibration and supports single-ended or differential measurements with programmable gain.
Can the K32W041Z run both Zigbee and Thread stacks simultaneously?
Yes, the K32W041Z supports concurrent Zigbee 3.0 and Thread 1.1 stack operation using NXP's MCUXpresso SDK and Connectivity Software. Its 152 KB SRAM and dual-baseband radio architecture allow simultaneous network participation - for example, acting as a Zigbee end device while relaying Thread messages. Stack coexistence is managed by the K32W041Z's hardware MAC accelerator and priority-based interrupt controller.
K32W041Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4, Bluetooth
- Protocol:
- Bluetooth v5.0, Thread, Zigbee®
- Modulation:
- -
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 11.2dBm
- Sensitivity:
- -101.3dBm
- Memory Size:
- 640kB Flash, 152kB SRAM
- Serial Interfaces:
- I2C, SPI, PWM, UART
- GPIO:
- 22
- Voltage - Supply:
- 1.9V ~ 3.6V
- Current - Receiving:
- 4.3mA
- Current - Transmitting:
- 7.4mA ~ 20.3mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 40-HVQFN (6x6)
K32W041Z FAQ
1.How can I place an order for K32W041Z through Aetrix?
Please submit a Request for Quotation (RFQ) for K32W041Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for K32W041Z reliable?
The price and inventory of K32W041Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for K32W041Z is usually 5 days.
3.What payment methods are accepted for K32W041Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for K32W041Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for K32W041Z?
K32W041Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your K32W041Z order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for K32W041Z?
For technical support, including K32W041Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your K32W041Z requirements.
6.How does Aetrix verify that K32W041Z is sourced from the original manufacturer or authorized distributors?
All K32W041Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that K32W041Z meets industry standards.
7.What is the process for return or replacement of K32W041Z?
All K32W041Z units undergo pre-shipment inspection (PSI). If there is an issue with K32W041Z, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The K32W041Z part is unused and in its original packaging.
Return procedure for K32W041Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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