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NXP Semiconductors K32W041AMY
- Part No.:
- K32W041AMY
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
K32W041AMY.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,940
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Product details
Overview
K32W041AMY from NXP Semiconductors is an Arm® Cortex®-M4-based wireless microcontroller supporting concurrent IEEE 802.15.4 and Bluetooth Low Energy 5.0 protocols, with 640 KB Flash, 152 KB SRAM, +15 dBm RF output power, and deep-power-down current of 360 nA - designed for battery-powered smart locks, thermostats, and sensor nodes in home/building automation.
For engineers reviewing the K32W041AMY datasheet, K32W041AMY pinout, K32W041AMY application, or K32W041AMY equivalent, this page delivers verified technical context, validated pin functions, confirmed low-power radio performance metrics, and real-world use-case mappings - all aligned to the Rev. 1.2 April 2022 product data sheet.
Technical Context
The K32W041AMY integrates dual protocol stacks (Zigbee 3.0/Thread over IEEE 802.15.4 and BLE 5.0) on a single Arm Cortex-M4 core running at up to 48 MHz, with hardware-accelerated MAC, AES-128/256, SHA-1/256, and dedicated low-power timers synchronized to the BLE link layer. Its RF subsystem includes integrated balun, antenna diversity control, and configurable transmit power from +0 to +15 dBm.
It features a dual-channel PDM microphone interface with hardware voice activity detection, 5-channel 12-bit ADC (190 ksamples/s), one analog comparator, temperature/battery sensors, and a DC-DC converter with 2.4–3.6 V supply range - all operating across −40 °C to +85 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 @ 48 MHz - enables real-time stack execution and application logic without external co-processor |
| Memory | 640 KB Flash + 152 KB SRAM + 1 MB Data Flash - supports OTA firmware updates and persistent network configuration storage |
| RF Performance | +15 dBm output / −97 dBm BLE RX sensitivity / −100 dBm 802.15.4 RX sensitivity - achieves >46 dB link budget for robust mesh node range |
| Power Consumption | 360 nA deep-power-down current - enables >10-year coin-cell battery life in intermittent-sensing applications |
| Peripherals | 2× I²C, 2× SPI, 2× USART, 9× PWM, 5× ADC inputs, DMIC subsystem, ISO7816 interface - enables direct sensor, actuator, and secure peripheral integration |
| Package | HVQFN40, 6 × 6 mm, 0.5 mm pitch - surface-mount compatible with high-density PCB layouts and RF ground plane requirements |
| Operating Range | −40 °C to +85 °C - qualified for uncontrolled indoor environments in smart home and commercial building deployments |
Pinout & Package
HVQFN40 package (6 × 6 mm, 0.5 mm pitch) with exposed die pad requiring connection to RF ground plane; RoHS-compliant, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF_IO (Pin 37) | RF Transceiver Interface | Single-ended 2.4 GHz antenna port with integrated balun - connects directly to PCB trace or chip antenna without external matching |
| VDD(RADIO) (Pin 35) / VSS(RF) (Pins 36, 38) | RF Power/Ground | Dedicated supply and ground pins isolate RF section noise from digital domain - mandatory for meeting BLE/802.15.4 radiated emission limits |
| XTAL_P / XTAL_N (Pins 1–2) | 32 MHz System Clock Source | Drives high-frequency oscillator for CPU and radio timing; internal capacitors eliminate need for external load caps |
| XTAL_32K_P / XTAL_32K_N (Pins 33–34) | 32.768 kHz RTC Clock | Enables precise sleep/wake timing and BLE advertising interval accuracy during ultra-low-power operation |
| PIO14/ADC0 – PIO19/ADC5 (Pins 17–23) | Analog Input Channels | 5 dedicated ADC input pins (K32W041AMY variant) - support direct connection of temperature, voltage, or resistive sensors |
| PIO20/ACP & PIO21/ACM (Pins 24–25) | Analog Comparator Inputs | Positive/negative differential inputs for threshold detection - used in wake-on-event or battery-low monitoring circuits |
| RSTN (Pin 27) | Active-Low Reset Input | Asynchronous reset signal - required for reliable power-on initialization and brown-out recovery |
| SWCLK / SWDIO (Pins 15–16) | Serial Wire Debug Interface | Two-pin JTAG/SWD interface for firmware programming and real-time debugging without additional debug headers |
Key Features
| Feature | Design Value |
|---|---|
| Dual-protocol radio engine | Hardware-accelerated IEEE 802.15.4 and BLE 5.0 transceivers sharing same RF front-end - eliminates need for separate radios in multi-standard gateways |
| Ultra-low-power sleep modes | Deep-power-down at 360 nA with IO-triggered wake-up - sustains years of operation on CR2032 batteries in motion or occupancy sensors |
| Secure boot & runtime protection | AES-128/256 + SHA-1/256 hardware accelerators + eFuse key storage - enforces authenticated firmware updates and encrypted network traffic |
| Integrated audio pre-processing | Dual-channel PDM interface with hardware voice activity detector - reduces MCU wake cycles and system power by >40% in voice-enabled edge devices |
| Flexible clock architecture | 32 MHz FRO + 32.768 kHz XTAL + programmable dividers - ensures precise timing for BLE advertising, 802.15.4 CSMA/CA, and RTC alarm events |
Applications
| Smart Lock Node | Wireless Thermostat Sensor |
|---|---|
|
Use Scenario: Battery-powered door lock reporting status, receiving BLE commands, and executing local access decisions. IC Role / Device Role / Timing Role: Primary wireless MCU handling BLE 5.0 command parsing, Zigbee 3.0 mesh relay, and secure key management via AES engine. Use Value: +15 dBm transmit power extends BLE range to 50+ meters indoors; 360 nA deep-power-down enables 5+ year CR2032 life between battery replacements. |
Use Scenario: Wall-mounted HVAC sensor measuring ambient temperature/humidity and transmitting data every 60 seconds over Thread network. IC Role / Device Role / Timing Role: IEEE 802.15.4 MAC controller with hardware CRC, address filtering, and auto-ACK - offloads link-layer tasks from CPU. Use Value: Integrated 12-bit ADC and temperature sensor eliminate external components; 32.768 kHz RTC ensures accurate 60 s wakeup intervals with ±2 ppm stability. |
| Occupancy Sensor Hub | Smart Lighting Controller |
|
Use Scenario: Ceiling-mounted PIR + ambient light sensor node detecting presence and illuminance, then relaying data via Zigbee 3.0 to gateway. IC Role / Device Role / Timing Role: Dual-role MCU executing PIR signal conditioning (via GPIO interrupts), ADC sampling, and concurrent Zigbee/BLE advertising. Use Value: 9-channel PWM drives RGB LED indicators; hardware VAD in DMIC subsystem enables future voice-command readiness without added BOM cost. |
Use Scenario: LED driver module controlling color-tunable luminaires using DALI or PWM, while maintaining secure BLE commissioning interface. IC Role / Device Role / Timing Role: BLE 5.0 peripheral with 8 simultaneous connections - allows smartphone provisioning, firmware update, and group control without gateway dependency. Use Value: 2× I²C interfaces manage external LED driver ICs and ambient light sensor; 1 MB Data Flash stores lighting profiles and calibration data across OTA updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI CC2652R1 | ARM Cortex-M4F @ 48 MHz, 352 KB Flash, 80 KB RAM, +10 dBm BLE/802.15.4 output, no integrated Data Flash | Lacks 1 MB Data Flash and hardware VAD; requires external flash for OTA storage; lower RF output limits range in dense wall-construction environments | Select when cost-sensitive designs prioritize minimal BOM over long-term field-upgrade capability |
| Silicon Labs EFR32MG21A020F768IM32 | ARM Cortex-M33 @ 39 MHz, 768 KB Flash, 96 KB RAM, +20 dBm output, Secure Vault security | Higher RF output but larger HVQFN48 package (7 × 7 mm); no integrated PDM/VAD subsystem - adds external audio components for voice features | Select when maximum RF range is critical and board area permits larger footprint; avoid if PDM microphone integration is required |
Compared with CC2652R1 and EFR32MG21A020F768IM32, the K32W041AMY uniquely combines 1 MB Data Flash for robust OTA resilience, hardware VAD for voice-ready endpoints, and 6 × 6 mm HVQFN40 packaging - making it optimal for space-constrained, battery-powered, multi-protocol edge nodes requiring field-upgradable firmware and future voice capability.
Availability
K32W041AMY is available at Aetrix Electronics and suitable for smart lock systems, wireless thermostat sensors, occupancy detection nodes, and smart lighting controllers requiring stable component supply and long-lifecycle support.
Supply support for K32W041AMY 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 ultra-low-power, multi-protocol wireless edge devices - specifically engineered to unify Zigbee, Thread, and BLE 5.0 in resource-constrained, battery-operated applications where security, longevity, and RF reliability are non-negotiable.
FAQ
What wireless protocols does the K32W041AMY support simultaneously?
The K32W041AMY supports concurrent IEEE 802.15.4 (for Zigbee 3.0 and Thread) and Bluetooth Low Energy 5.0 protocols using shared hardware resources. Its dual-stack capability enables seamless interoperability - for example, acting as a BLE provisioning interface while participating in a Thread mesh network. The K32W041AMY implements hardware MAC acceleration and dedicated timers to maintain timing-critical operations across both protocols without CPU overload.
How does the K32W041AMY achieve 360 nA deep-power-down current?
The K32W041AMY reaches 360 nA deep-power-down current by powering down the CPU, Flash, SRAM retention, and most peripherals while retaining state in dedicated low-leakage registers and enabling wake-up via selected GPIOs or low-power timers. This mode leverages the integrated 32.768 kHz crystal oscillator and dedicated wakeup timers - both optimized for sub-µA operation - ensuring precise timing for periodic sensor reads without compromising battery life. The K32W041AMY specification confirms this value under defined conditions in the Rev. 1.2 datasheet.
Does the K32W041AMY include on-chip memory for Over-The-Air updates?
Yes, the K32W041AMY includes 640 KB of embedded Flash for application code and bootloader storage, plus 1 MB of dedicated Data Flash for storing network credentials, calibration data, and firmware images during OTA updates. This dual-memory architecture isolates executable code from mutable data, enabling atomic firmware swaps and rollback capability - a critical requirement for certified IoT deployments. The K32W041AMY's Data Flash is explicitly documented in Table 1 of the Rev. 1.2 datasheet.
What is the function of the DMIC subsystem in the K32W041AMY?
The K32W041AMY's DMIC subsystem provides a dual-channel PDM microphone interface with hardware-based voice activity detection (VAD), decimation filters, 16-entry FIFOs, and optional DC blocking. It operates independently of the CPU - allowing continuous audio monitoring at ultra-low power, triggering wake-up only when speech is detected. This design reduces average system power by eliminating constant CPU polling and enables voice-ready endpoints without adding external DSP or microphones. The K32W041AMY datasheet confirms VAD functionality in Section 2.3.
Is the K32W041AMY pin-compatible with other members of the K32W041A/K32W041AM family?
Yes, the K32W041AMY shares identical HVQFN40 pinout and mechanical footprint with all K32W041A and K32W041AM variants, including K32W041AMZ and K32W041AK. Pin functions, power domains, and RF layout requirements are fully consistent across the family - enabling drop-in replacement during design-in or production ramp. Differences are limited to internal memory configuration (e.g., 1 MB Data Flash in K32W041AMY) and minor peripheral count variations (e.g., 9 vs. 10 PWM channels), which do not affect pin mapping or electrical compatibility.
K32W041AMY 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)
K32W041AMY FAQ
1.How can I place an order for K32W041AMY through Aetrix?
Please submit a Request for Quotation (RFQ) for K32W041AMY 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 K32W041AMY reliable?
The price and inventory of K32W041AMY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for K32W041AMY is usually 5 days.
3.What payment methods are accepted for K32W041AMY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for K32W041AMY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for K32W041AMY?
K32W041AMY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your K32W041AMY 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 K32W041AMY?
For technical support, including K32W041AMY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your K32W041AMY requirements.
6.How does Aetrix verify that K32W041AMY is sourced from the original manufacturer or authorized distributors?
All K32W041AMY 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 K32W041AMY meets industry standards.
7.What is the process for return or replacement of K32W041AMY?
All K32W041AMY units undergo pre-shipment inspection (PSI). If there is an issue with K32W041AMY, 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 K32W041AMY part is unused and in its original packaging.
Return procedure for K32W041AMY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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