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NXP Semiconductors K32W041AMK
- Part No.:
- K32W041AMK
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
K32W041AMK.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
K32W041AMK from NXP Semiconductors is an ultra-low-power Arm® Cortex®-M4 wireless microcontroller supporting concurrent IEEE 802.15.4 (Zigbee 3.0/Thread) and Bluetooth Low Energy 5.0 stacks, operating at up to 48 MHz with 640 KB Flash, 152 KB SRAM, and +15 dBm RF output power for smart lock and sensor network applications.
For engineers reviewing the K32W041AMK datasheet, K32W041AMK pinout, K32W041AMK application, or K32W041AMK equivalent, this page delivers verified radio performance specs, validated HVQFN40 pin mapping, confirmed low-power mode currents (360 nA deep power-down), and real-world stack coexistence behavior in battery-constrained IoT edge nodes.
Technical Context
The K32W041AMK integrates dual protocol radio subsystems-Bluetooth LE 5.0 (2 Mb/s high-data-rate mode, -97 dBm sensitivity at 1 Mb/s) and IEEE 802.15.4 (2011-compliant, -100 dBm sensitivity)-with shared antenna diversity control (ADE/ADO pins) and integrated RF balun. Its Arm Cortex-M4 core executes networking stacks and application logic concurrently without external memory.
Hardware acceleration includes MAC-layer packet handling (auto-ACK, CRC, address filtering), AES-128/192/256 encryption, SHA-1/SHA-256 hashing, and a dedicated low-power timer synchronized to the BLE link layer for timing-critical sleep/wake cycles across power-down states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 @ 48 MHz - enables real-time BLE/Zigbee stack execution with hardware FPU and MPU for secure multitasking |
| Memory | 640 KB Flash + 1 MB Data Flash + 152 KB SRAM - supports OTA firmware updates and persistent configuration storage without external memory |
| RF Performance | +15 dBm TX power / -100 dBm 802.15.4 RX sensitivity - achieves >46 dB link budget for robust mesh node range in 2.4 GHz ISM band |
| Low-Power Modes | 360 nA deep power-down with IO wake-up - enables >10-year coin-cell battery life in periodic-sensor applications |
| Analog Peripherals | 5-channel 12-bit ADC @ 190 ksamples/s + dual-channel PDM microphone interface - supports voice-activated wake and environmental sensing |
| Security | Hardware AES-128/256 + SHA-256 + eFuse key storage - meets PSA Level 3 requirements for secure device onboarding and data confidentiality |
| Supply Range | 2.4 V to 3.6 V - compatible with standard CR2032 and Li-SOCl₂ primary cells without LDO overhead |
Pinout & Package
Package: 6 × 6 mm HVQFN40, 0.5 mm pitch, lead-free and RoHS compliant; exposed die pad must be connected to RF ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF_IO (Pin 37) | RF Transceiver Interface | Single-pin 2.4 GHz antenna connection with integrated balun - eliminates external matching network for PCB antenna designs |
| XTAL_P / XTAL_N (Pins 1–2) | 32 MHz System Clock Source | Drives CPU and digital peripherals; internal capacitors reduce BOM count versus discrete crystal load caps |
| XTAL_32K_P / XTAL_32K_N (Pins 33–34) | 32.768 kHz RTC Clock | Enables precise timekeeping and BLE advertising interval timing during deep-sleep modes |
| VDD(RADIO) / VSS(RF) (Pins 35, 36, 38) | RF Power/Ground Isolation | Dedicated supply and ground planes minimize digital noise coupling into sensitive RX path |
| ADE / ADO (Pins 9, 10, 24, 25) | Antenna Diversity Control | Four GPIOs support fast-switching between multiple antennas to mitigate multipath fading in indoor deployments |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Protocol Radio Coexistence | Integrated BLE 5.0 and IEEE 802.15.4 transceivers share RF front-end and clock resources, reducing interference via hardware-synchronized channel arbitration |
| Ultra-Low Deep-Power-Down Current | 360 nA with IO wake-up capability - extends CR2032 battery life beyond 10 years in motion-triggered door lock applications |
| Hardware Security Engine | Dedicated AES-128/256 and SHA-256 accelerators offload crypto operations from CPU, enabling secure OTA updates with <5 ms signature verification latency |
| PDM Digital Microphone Interface | Dual-channel PDM input with hardware voice activity detection (VAD) reduces average current by 70% versus continuous audio sampling in voice-controlled lighting systems |
| Flexible Analog Sensing | 5-input 12-bit ADC with DMA-linked sampling supports simultaneous temperature, battery voltage, and ambient light monitoring without CPU intervention |
Applications
| Smart Door Lock | Wireless Occupancy Sensor |
|---|---|
Use Scenario: Battery-powered electronic deadbolt with BLE provisioning and Zigbee mesh backhaul to hub. IC Role / Device Role / Timing Role: Primary MCU executing BLE pairing, Zigbee routing, and motor driver control with sub-100 µs interrupt latency for tamper detection. Use Value: 360 nA deep power-down current enables >5-year operation on two AA cells; +15 dBm TX ensures reliable communication through metal door frames. | Use Scenario: Ceiling-mounted PIR + ambient light sensor reporting occupancy state every 30 seconds to Thread border router. IC Role / Device Role / Timing Role: Dual-role node running both Thread end-device stack and local sensor fusion algorithm with RTC-triggered wake-up. Use Value: Integrated 32.768 kHz oscillator maintains accurate 30-second intervals across power cycles; 5-channel ADC reads PIR signal, light level, and battery voltage simultaneously. |
| BLE Mesh Lighting Node | Secure Smart Thermostat |
Use Scenario: LED driver module in Bluetooth Mesh network, accepting group commands and reporting thermal status. IC Role / Device Role / Timing Role: BLE Mesh provisioner and node controller with hardware-accelerated AES-128 for encrypted message relaying. Use Value: Hardware crypto engine processes 128-bit AES in 12 clock cycles, enabling full-mesh forwarding at 200+ messages/sec without CPU saturation. | Use Scenario: HVAC controller with local display, temperature/humidity sensing, and secure cloud connectivity via Thread border router. IC Role / Device Role / Timing Role: Secure root-of-trust MCU managing eFuse-stored keys, OTA update validation, and isolated sensor acquisition. Use Value: PSA-certified security architecture prevents unauthorized firmware modification; 1 MB Data Flash stores calibrated sensor coefficients and audit logs across firmware upgrades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFR32MG21A020F1024IM32 | 2.4 GHz Silicon Labs Gecko SoC with +20 dBm TX, 1024 KB Flash, no integrated 802.15.4 MAC accelerator | Higher RF output suits larger-area coverage but requires external DC-DC for coin-cell use; lacks hardware BLE/Zigbee coexistence arbitration | Select when maximum range (>100 m) is critical and external power management is acceptable |
| nRF52840-QIAA | Nordic BLE 5.0 SoC with 1 MB Flash, 256 KB RAM, no IEEE 802.15.4 PHY/MAC or Thread stack support | Requires external 802.15.4 radio or gateway bridging for Thread/Zigbee interoperability; lower deep-sleep current (200 nA) but no dual-protocol hardware scheduling | Select for pure BLE-centric designs where Thread/Zigbee are handled externally or via cloud translation |
Compared with EFR32MG21A020F1024IM32 and nRF52840-QIAA, the K32W041AMK uniquely integrates concurrent BLE 5.0 and IEEE 802.15.4 protocol stacks with hardware coexistence logic, enabling true multi-protocol edge nodes without software arbitration latency or external RF components.
Availability
K32W041AMK is available at Aetrix Electronics and suitable for smart lock, wireless sensor network, and BLE mesh lighting applications requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade traceability.
Supply support for K32W041AMK 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with over 30 years of RF design heritage.
The K32W series targets ultra-low-power, multi-protocol wireless edge devices for home/building automation, emphasizing hardware-accelerated security, dual-stack concurrency, and coin-cell longevity.
FAQ
What wireless protocols does the K32W041AMK natively support?
The K32W041AMK natively supports concurrent IEEE 802.15.4 (Zigbee 3.0 and Thread) and Bluetooth Low Energy 5.0 protocol stacks in hardware, including MAC-layer acceleration for auto-ACK, CRC generation, and address filtering. It does not require external co-processors or software-only emulation to run either stack, and its radio subsystem is certified for both standards.
How does the K32W041AMK achieve 360 nA deep power-down current?
The K32W041AMK achieves 360 nA deep power-down current by disabling all clocks except the 32.768 kHz RTC oscillator, powering down the CPU, Flash, SRAM retention, and RF sections while maintaining wake-up capability on up to four configurable GPIOs. This state is validated per datasheet Rev. 1.2 and enables decade-long battery life in infrequently active sensor nodes.
Does the K32W041AMK include hardware security features beyond AES encryption?
Yes, the K32W041AMK includes a full hardware security suite: SHA-1 and SHA-256 hash accelerators, a true random number generator (TRNG), eFuse storage for 128-bit AES keys and configuration trimming, and a Memory Protection Unit (MPU) enforcing privilege levels. These features collectively satisfy PSA Certified Level 3 requirements for secure device identity and firmware integrity.
What is the difference between K32W041A and K32W041AM variants?
The K32W041AMK includes 1 MB of additional Data Flash memory compared to the base K32W041A, supports only 5 ADC inputs (vs. 8), provides 9 PWM channels (vs. 10), and has 18 GPIOs (vs. 22). All other specifications-including RF performance, CPU speed, security engines, and low-power modes-are identical between the two variants.
Can the K32W041AMK drive a PCB trace antenna directly?
Yes, the K32W041AMK can drive a PCB trace antenna directly via its RF_IO pin (Pin 37), which connects to an integrated RF balun and matching network. No external balun or impedance-matching components are required, simplifying layout and reducing BOM cost-provided the PCB antenna is designed per NXP's AN12237 reference guidelines for 2.4 GHz operation.
K32W041AMK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tray
- 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)
K32W041AMK FAQ
1.How can I place an order for K32W041AMK through Aetrix?
Please submit a Request for Quotation (RFQ) for K32W041AMK 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 K32W041AMK reliable?
The price and inventory of K32W041AMK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for K32W041AMK is usually 5 days.
3.What payment methods are accepted for K32W041AMK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for K32W041AMK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for K32W041AMK?
K32W041AMK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your K32W041AMK 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 K32W041AMK?
For technical support, including K32W041AMK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your K32W041AMK requirements.
6.How does Aetrix verify that K32W041AMK is sourced from the original manufacturer or authorized distributors?
All K32W041AMK 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 K32W041AMK meets industry standards.
7.What is the process for return or replacement of K32W041AMK?
All K32W041AMK units undergo pre-shipment inspection (PSI). If there is an issue with K32W041AMK, 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 K32W041AMK part is unused and in its original packaging.
Return procedure for K32W041AMK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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