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NXP Semiconductors K32W041AY
- Part No.:
- K32W041AY
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
K32W041AY.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
K32W041AY from NXP Semiconductors is an Arm® Cortex®-M4-based wireless microcontroller supporting IEEE 802.15.4 (Zigbee 3.0/Thread) and Bluetooth Low Energy 5.0 protocols, with 640 KB Flash, 152 KB SRAM, +15 dBm RF output power, and ultra-low deep-power-down current of 350 nA - deployed in battery-powered smart locks, thermostats, and sensor nodes.
For engineers reviewing the K32W041AY datasheet, K32W041AY pinout, K32W041AY application, or K32W041AY equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts for home automation and secure low-power IoT edge devices.
Technical Context
The K32W041AY integrates dual protocol stacks (BLE 5.0 and IEEE 802.15.4) on a single die with hardware-accelerated MAC, AES-128/256 encryption, and SHA-1/SHA-256 hash engines. Its radio subsystem includes integrated RF balun, antenna diversity control, and configurable transmit power up to +15 dBm with 46 dB link budget.
It features a 48 MHz Arm Cortex-M4 CPU with MPU, SWD debug, and low-power timers running off 32 kHz XTAL or FRO; supports simultaneous BLE connections (up to eight), 2 Mb/s high-data-rate mode, and -97 dBm BLE receiver sensitivity at 1 MB/s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 @ up to 48 MHz - enables real-time stack execution and application logic with deterministic interrupt latency. |
| Memory | 640 KB embedded Flash + 152 KB SRAM - sufficient for OTA-upgradable Zigbee/Thread/BLE stacks plus custom firmware. |
| RF Performance | +15 dBm max TX power, -97 dBm BLE RX sensitivity (1 MB/s), -100 dBm 802.15.4 RX sensitivity - ensures robust 2.4 GHz mesh connectivity in noisy environments. |
| Power Efficiency | 350 nA deep-power-down current with IO wake-up - enables >10-year coin-cell operation in infrequently polled sensors. |
| Analog Peripherals | 8-channel 12-bit ADC (190 ksamples/s), dual PDM microphone interface with hardware VAD - supports voice-triggered and environmental sensing without host CPU load. |
| Security | Hardware AES-128/192/256, SHA-1/SHA-256 accelerators, and 128-bit eFuse key storage - meets secure boot and encrypted OTA update requirements. |
| Supply Range | 2.4 V to 3.6 V - compatible with standard CR2032 and Li-SOCl₂ primary cells without external regulators. |
Pinout & Package
Package: 40-pin HVQFN (6 × 6 mm, 0.5 mm pitch), lead-free and RoHS compliant, with exposed die pad connected to RF ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| XTAL_P / XTAL_N | 32 MHz crystal oscillator inputs | Provide precise system clock for RF timing compliance and BLE/802.15.4 symbol accuracy. |
| XTAL_32K_P / XTAL_32K_N | 32.768 kHz crystal oscillator inputs | Enable RTC and low-power timer operation during deep-sleep modes with ±20 ppm stability. |
| RF_IO | RF transceiver antenna interface | Single-ended 2.4 GHz RF port with integrated balun; requires matching network to 50 Ω antenna. |
| VDD(RADIO) / VSS(RF) | Dedicated RF supply and ground | Isolate sensitive RF circuitry from digital noise; mandatory separate PCB copper pour and decoupling. |
| PIO0–PIO21 | Configurable GPIOs (22 total) | Support multiplexed functions including USART, SPI, I²C, PWM, ADC, ISO7816, and IR blaster - enable flexible peripheral integration. |
| RSTN | Active-low reset input | Asynchronous hardware reset; must be held low ≥100 ns for reliable initialization after power-up. |
| SWCLK / SWDIO | Serial Wire Debug interface | Enable full-core debugging, flash programming, and real-time trace via standard ARM SWD protocol. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-protocol radio coexistence | Integrated BLE 5.0 and IEEE 802.15.4 transceivers with shared antenna diversity control and improved WiFi coexistence - eliminates need for external RF switches or filters. |
| Ultra-low-power sleep architecture | Deep-power-down mode draws only 350 nA while retaining RAM state and enabling wake-up from any GPIO or low-power timer - extends battery life in intermittent-sensing applications. |
| Hardware security acceleration | AES-128/256 and SHA-1/SHA-256 engines operate independently of CPU - accelerate secure boot, encrypted OTA, and TLS handshake without impacting application throughput. |
| Digital audio subsystem | Dual-channel PDM interface with hardware voice activity detection (VAD) - reduces average power by disabling audio processing during silence, critical for always-on voice interfaces. |
| Flexible analog sensing | 8-input 12-bit ADC with DMA-linked sampling and 190 ksamples/s rate - supports concurrent temperature, battery voltage, and environmental sensor acquisition with minimal CPU overhead. |
Applications
| Smart Door Lock | Zigbee 3.0 Lighting Node |
|---|---|
|
Use Scenario: Battery-powered electronic deadbolt with BLE provisioning and Zigbee 3.0 reporting to hub. IC Role / Device Role / Timing Role: Primary MCU executing BLE pairing, Zigbee commissioning, motor driver control, and tamper detection logic. Use Value: 350 nA deep-power-down current enables >5-year CR123A operation; +15 dBm output ensures reliable 15 m indoor range through walls. |
Use Scenario: Dimmable LED fixture with multi-protocol support for both BLE mobile control and Zigbee 3.0 network integration. IC Role / Device Role / Timing Role: Wireless controller managing PWM dimming, ambient light sensing, and dual-stack network bridging. Use Value: Dual 2.4 GHz radios eliminate gateway dependency; hardware AES secures over-the-air firmware updates against replay attacks. |
| Wireless Thermostat Sensor | Thread Border Router Endpoint |
|
Use Scenario: Wall-mounted HVAC sensor node measuring temperature, humidity, and occupancy via PIR, transmitting via Thread. IC Role / Device Role / Timing Role: Low-power edge node performing local sensor fusion, scheduled reporting, and secure Thread joining. Use Value: Integrated 32.768 kHz XTAL and low-power timers maintain accurate timekeeping across sleep cycles; 8-channel ADC reads multiple sensors simultaneously. |
Use Scenario: Compact Thread border router component in smart home hubs, bridging Thread mesh to IPv6 backbone. IC Role / Device Role / Timing Role: Network coordinator handling Thread commissioning, routing table maintenance, and IPv6 header compression. Use Value: Hardware MAC accelerator offloads packet formatting, CRC, address filtering, and auto-ACK - reduces CPU load below 5% during peak mesh traffic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFR32MG21A020F1024IM32 | ARM Cortex-M33 core, 32 MHz, 1024 KB Flash, +20 dBm TX, proprietary Simplicity Studio SDK | Higher RF output but no native IEEE 802.15.4/Zigbee 3.0 stack support; requires Silicon Labs Gecko SDK licensing | Prefer when maximum RF range (>100 m) is required and Zigbee certification is handled externally. |
| CC2652R1F | ARM Cortex-M4F core, 48 MHz, 352 KB Flash, +5 dBm TX, TI-RTOS and SimpleLink SDK | Limited memory for dual-stack operation; lacks hardware AES-256 and SHA-256 accelerators | Select when BLE-only functionality suffices and cost-per-node is prioritized over cryptographic agility. |
Compared with EFR32MG21A020F1024IM32 and CC2652R1F, the K32W041AY uniquely delivers certified dual-stack (Zigbee 3.0 + BLE 5.0) operation with hardware security engines and ultra-low 350 nA deep-sleep current - making it optimal for certified, long-life, multi-protocol edge nodes.
Availability
K32W041AY is available at Aetrix Electronics and suitable for smart lock systems, wireless lighting controls, and battery-powered sensor networks requiring stable component supply, long-term lifecycle assurance, and NXP-authorized traceability.
Supply support for K32W041AY 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 SoCs and trusted execution environments.
The K32W series targets secure, low-power wireless edge devices for home/building automation, emphasizing certified multi-protocol operation, hardware-rooted security, and decade-long battery life - directly addressing design constraints in commercial IoT deployments.
FAQ
What wireless protocols does the K32W041AY natively support?
The K32W041AY natively supports IEEE 802.15.4 (for Zigbee 3.0 and Thread) and Bluetooth Low Energy 5.0 protocols with hardware-accelerated MAC and link-layer timing. It includes certified protocol stacks and does not require external co-processors. The K32W041AY achieves simultaneous eight-connection BLE operation and full 802.15.4 frame handling with auto-ACK and CRC offload.
Does the K32W041AY include hardware security features?
Yes, the K32W041AY integrates dedicated hardware security blocks: AES-128/192/256 engine, SHA-1 and SHA-256 accelerators, true random number generator, and 128-bit eFuse for key storage. These enable secure boot, encrypted OTA updates, and TLS offload - all verified in NXP's Common Criteria EAL4+ certified secure element implementation within the K32W041AY.
What is the deep-power-down current specification for the K32W041AY?
The K32W041AY achieves 350 nA deep-power-down current with wake-up capability from GPIO or low-power timers, as measured per NXP datasheet Rev. 1.2. This value applies specifically to the K32W041A variant (which K32W041AY belongs to); the K32W041AM variant draws 360 nA. Both retain SRAM content and RTC functionality in this state.
How many ADC channels does the K32W041AY support, and what is its resolution?
The K32W041AY supports eight 12-bit ADC input channels (ADC0–ADC7) with up to 190 ksamples/s conversion rate. It provides hardware support for continuous sampling, sequence scanning across multiple inputs, and DMA-linked transfers - enabling efficient concurrent sensing of temperature, battery voltage, and environmental parameters without CPU intervention.
What package type and pin count does the K32W041AY use?
The K32W041AY uses a 40-pin HVQFN package measuring 6 × 6 × 0.85 mm with 0.5 mm pitch and an exposed thermal pad. This package is identical across K32W041A variants (including K32W041AY) and is RoHS-compliant. Pinout matches the K32W041A reference design, supporting full GPIO, debug, RF, and power interface compatibility.
K32W041AY 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)
K32W041AY FAQ
1.How can I place an order for K32W041AY through Aetrix?
Please submit a Request for Quotation (RFQ) for K32W041AY 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 K32W041AY reliable?
The price and inventory of K32W041AY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for K32W041AY is usually 5 days.
3.What payment methods are accepted for K32W041AY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for K32W041AY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for K32W041AY?
K32W041AY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your K32W041AY 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 K32W041AY?
For technical support, including K32W041AY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your K32W041AY requirements.
6.How does Aetrix verify that K32W041AY is sourced from the original manufacturer or authorized distributors?
All K32W041AY 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 K32W041AY meets industry standards.
7.What is the process for return or replacement of K32W041AY?
All K32W041AY units undergo pre-shipment inspection (PSI). If there is an issue with K32W041AY, 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 K32W041AY part is unused and in its original packaging.
Return procedure for K32W041AY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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