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NXP Semiconductors K32W061K
- Part No.:
- K32W061K
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
K32W061K.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
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Product details
Overview
K32W061 from NXP Semiconductors is an ultra-low-power Arm® Cortex®-M4 wireless microcontroller supporting Zigbee 3.0, Thread, and Bluetooth Low Energy 5.0 protocols. It integrates a 2.4 GHz IEEE 802.15.4 transceiver, a +11 dBm BLE 5.0 transceiver with -97 dBm sensitivity, 640 KB Flash/152 KB SRAM, and an embedded NTAG I2C NFC interface - enabling secure, battery-operated smart locks and sensor nodes.
For engineers reviewing the K32W061 datasheet, K32W061 pinout, K32W061 application, or K32W061 equivalent, this page delivers verified technical context on its dual-radio coexistence, deep power-down (350 nA), 22 GPIOs with configurable interrupts, PDM microphone subsystem, and HVQFN40 package with dedicated RF/NFC pins - all critical for home automation and secure edge node design.
Technical Context
The K32W061 implements a dual-protocol radio architecture with independent IEEE 802.15.4 and Bluetooth LE 5.0 PHY/MAC stacks, sharing a single 2.4 GHz front-end and antenna diversity control (ADE/ADO). Its Arm Cortex-M4 core runs at up to 48 MHz with MPU, NVIC, and SWD debug support, tightly coupled to 640 KB on-chip flash supporting OTA updates and 152 KB SRAM for concurrent stack and application execution.
Power management includes four low-power states: Sleep, Deep-sleep, Power-down, and Deep-power-down (350 nA with IO wake-up), enabled by dual 32 kHz oscillators (XTAL and FRO) and hardware timers that maintain BLE link timing across sleep cycles. The integrated DCDC converter, battery/temperature sensors, and 12-bit 8-channel ADC with DMA support enable autonomous sensing without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 @ up to 48 MHz - enables real-time protocol stack processing with hardware FPU and MPU for memory isolation |
| Wireless Protocols | Zigbee 3.0, Thread, Bluetooth LE 5.0 - full-stack support in ROM/firmware, including 8 simultaneous BLE connections |
| Transmit Power | +11 dBm max with 46 dB range - allows robust 2.4 GHz mesh networking in dense indoor environments |
| Receiver Sensitivity | -97 dBm (BLE), -100 dBm (IEEE 802.15.4) - ensures reliable link budget for battery-powered end nodes |
| Memory | 640 KB Flash / 152 KB SRAM - sufficient for dual-stack firmware, OTA update partitioning, and application logic |
| Low-Power Mode | 350 nA Deep-power-down with IO wake-up - enables >10-year coin-cell operation in sensor applications |
| NFC Interface | Integrated NTAG I2C (Type 2) - provides secure out-of-band provisioning and device pairing without external NFC controller |
| Package | HVQFN40, 6 × 6 mm, 0.5 mm pitch - compact RF-optimized layout with dedicated VDD(RADIO), VSS(RF), and LA/LB NFC antenna pins |
Pinout & Package
HVQFN40 (SOT618-1), 6 × 6 mm, 0.5 mm pitch, lead-free and RoHS compliant. Exposed die pad must connect to RF ground plane. Includes dedicated RF_IO, VDD(RADIO), VSS(RF), XTAL_32K_P/N, and LA/LB NFC antenna terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF_IO | RF Transceiver I/O | Single-pin 2.4 GHz antenna interface with integrated balun - connects directly to PCB trace or chip antenna |
| LA / LB | NFC Antenna Inputs | Differential inputs for external NFC loop antenna - enables Type 2 tag operation without discrete NFC frontend |
| XTAL_P / XTAL_N | 32 MHz Crystal Oscillator | Drives high-frequency system clock; internal capacitors eliminate need for external load caps |
| XTAL_32K_P / XTAL_32K_N | 32.768 kHz Crystal Oscillator | Provides precise timing for RTC, BLE sleep clock, and low-power timer accuracy over temperature |
| VDD(RADIO) / VSS(RF) | RF Power/Ground | Isolated analog supply domain - mandatory separation from digital VDDE/VDD(PMU) to minimize RF noise coupling |
| PIO0–PIO21 | Configurable GPIO | 22 digital I/Os with multiple alternate functions (USART, SPI, I2C, PWM, ADC, PDM, ISO7816); up to 4 support pin-interrupt |
| VDDE | I/O Supply | 1.9–3.6 V tolerant digital I/O voltage - supports direct interfacing with common sensors and peripherals |
| RSTN | Active-Low Reset | Asynchronous reset input - required for cold start and brown-out recovery; pulled high internally |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Protocol Radio Coexistence | Hardware-level arbitration between BLE 5.0 and IEEE 802.15.4 radios - eliminates software contention and enables concurrent network participation |
| Ultra-Low-Power Audio Capture | PDM digital microphone interface with hardware voice activity detector - reduces MCU wake-ups and extends battery life in voice-enabled sensors |
| Secure On-Chip Cryptography | 128/192/256-bit AES engine + SHA-1/SHA-256 accelerator + eFuse-stored key - enables secure boot, OTA authentication, and data encryption |
| Smart Power Management | Dedicated 32 kHz BLE timer running in Deep-power-down - maintains connection timing without waking CPU, enabling sub-μA average current |
| Flexible Analog Integration | 8-channel 12-bit ADC (190 kS/s), analog comparator, battery/temperature sensors - eliminates need for external signal conditioning in environmental monitors |
| ISO7816 Smart Card Interface | Full-duplex digital interface with RST/CLK/IO signals - supports external analog frontend for contact-based smart card reader implementation |
Applications
| Smart Lock Access Control | Wireless Occupancy Sensor |
|---|---|
Use Scenario: Battery-powered door lock with BLE provisioning, Zigbee network enrollment, and NFC tap-to-pair. IC Role / Device Role / Timing Role: K32W061 serves as primary SoC handling BLE link layer, Zigbee MAC, NFC tag emulation, and secure key storage. Use Value: Integrated NTAG and dual-radio reduce BOM count by 3 components; 350 nA deep-power-down enables 5+ year CR2032 operation. |
Use Scenario: Ceiling-mounted PIR + ambient light sensor node reporting occupancy via Thread to smart hub. IC Role / Device Role / Timing Role: K32W061 executes Thread stack, processes ADC/light readings, and manages scheduled low-power wake-ups. Use Value: Hardware-accelerated 802.15.4 MAC and 32-bit RTC timer ensure deterministic packet timing and <10 μA average current in sleep. |
| Bluetooth Mesh Lighting Node | Secure Asset Tracker |
Use Scenario: LED driver module with BLE mesh control, dimming via PWM, and thermal monitoring. IC Role / Device Role / Timing Role: K32W061 runs BLE mesh stack, drives 10-channel PWM for RGBW control, and reads onboard temperature sensor. Use Value: 10 PWM outputs eliminate external LED drivers; integrated temp sensor enables thermal derating without added ICs. |
Use Scenario: Tamper-evident logistics tag with motion detection, GPS assist, and encrypted location upload via BLE. IC Role / Device Role / Timing Role: K32W061 acts as secure host: manages accelerometer interrupt, encrypts data with AES-256, and initiates BLE advertising on event. Use Value: eFuse-stored keys and hardware crypto prevent firmware extraction; Deep-power-down + motion wake-up extend battery to 3 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFR32MG21A020F1024IM32 | 2.4 GHz + Sub-GHz dual-band, no integrated NFC; 1024 KB Flash, 96 KB RAM; +20 dBm max TX | Better range in open-field deployments; lacks NTAG for tap provisioning; requires external NFC for pairing | Select when Sub-GHz long-range or higher TX power is prioritized over NFC convenience and coin-cell lifetime |
| nRF52840 DK | BLE 5.0 + 802.15.4 only (no Zigbee/Thread stack in ROM); 1 MB Flash, 256 KB RAM; no integrated NFC or DCDC | Requires external NFC IC and PMIC for comparable functionality; higher memory headroom for custom stacks | Select for maximum flexibility in custom protocol development where NXP's certified Zigbee/Thread stacks are not required |
Compared with EFR32MG21A020F1024IM32 and nRF52840 DK, the K32W061 uniquely combines certified multi-protocol stacks, embedded NTAG, and 350 nA deep-power-down - making it optimal for cost-sensitive, security-critical, battery-constrained smart home endpoints requiring zero-touch setup.
Availability
K32W061 is available at Aetrix Electronics and suitable for smart lighting, secure access control, and wireless sensor networks requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade reliability.
Supply support for K32W061 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 deep expertise in wireless MCUs and trusted execution environments.
The K32W series targets ultra-low-power, multi-protocol wireless edge nodes - designed specifically for certified Zigbee, Thread, and BLE 5.0 applications in constrained battery-powered devices where security, RF performance, and integration density are critical.
FAQ
What wireless protocols does the K32W061 natively support?
The K32W061 natively supports Zigbee 3.0, Thread, and Bluetooth Low Energy 5.0 protocols with full certified stacks pre-integrated in ROM/firmware. It includes hardware accelerators for both IEEE 802.15.4 and BLE 5.0 PHY/MAC layers, enabling concurrent operation and eight simultaneous BLE connections without external coexistence circuitry. This makes the K32W061 ideal for interoperable smart home ecosystems requiring multi-standard compatibility.
Does the K32W061 include NFC capability, and how is it implemented?
Yes, the K32W061 includes an integrated NTAG I2C interface compliant with NFC Forum Type 2 specification. It features dedicated LA and LB pins for connecting an external loop antenna, enabling tap-to-pair provisioning, secure out-of-band key exchange, and firmware updates without requiring a separate NFC controller IC. This NFC functionality is exclusive to the K32W061 variant - the K32W041 omits it entirely.
What is the lowest achievable operating current for the K32W061 in standby mode?
The K32W061 achieves a deep-power-down current of 350 nA with wake-up capability via GPIOs - verified under specified conditions with VDD = 3.0 V and Tj = 25 °C. This ultra-low quiescent current is enabled by dedicated low-power oscillators, retention RAM, and hardware timers that operate independently of the main CPU, allowing multi-year operation on a single CR2032 coin cell in intermittent-sensing applications.
How many analog-to-digital converter channels does the K32W061 provide, and what are their key specs?
The K32W061 integrates an 8-channel, 12-bit successive-approximation ADC with a maximum sampling rate of 190 ksamples/s. It supports both single-shot and continuous conversion modes, hardware-triggered sequences, and DMA-linked transfers to minimize CPU overhead. Input channels include ADC0–ADC5 (multiplexed with GPIOs PIO14–PIO19), plus dedicated battery and temperature sensor inputs - eliminating need for external signal conditioning in most environmental monitoring designs.
What debug interfaces are supported on the K32W061, and how are they accessed?
The K32W061 supports Serial Wire Debug (SWD) via dedicated PIO12/SWCLK and PIO13/SWDIO pins, with 8 hardware breakpoints and 4 watchpoints. It also provides Serial Wire Output (SWO) on PIO14/ADC0 for real-time trace streaming. These interfaces are accessible through standard ARM-compliant debug probes (e.g., J-Link, LPC-Link2) and are fully supported by NXP's MCUXpresso IDE - enabling full visibility into RTOS tasks, stack usage, and peripheral register states during development and validation of the K32W061.
K32W061K 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
- 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)
K32W061K FAQ
1.How can I place an order for K32W061K through Aetrix?
Please submit a Request for Quotation (RFQ) for K32W061K 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 K32W061K reliable?
The price and inventory of K32W061K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for K32W061K is usually 5 days.
3.What payment methods are accepted for K32W061K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for K32W061K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for K32W061K?
K32W061K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your K32W061K 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 K32W061K?
For technical support, including K32W061K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your K32W061K requirements.
6.How does Aetrix verify that K32W061K is sourced from the original manufacturer or authorized distributors?
All K32W061K 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 K32W061K meets industry standards.
7.What is the process for return or replacement of K32W061K?
All K32W061K units undergo pre-shipment inspection (PSI). If there is an issue with K32W061K, 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 K32W061K part is unused and in its original packaging.
Return procedure for K32W061K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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