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NXP Semiconductors K32W041AMZ
- Part No.:
- K32W041AMZ
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
K32W041AMZ.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
K32W041AMZ from NXP Semiconductors is an ultra-low-power Arm® Cortex®-M4 wireless microcontroller supporting concurrent IEEE 802.15.4 and Bluetooth Low Energy 5.0 protocols, with +15 dBm RF output power, 640 KB Flash + 1 MB Data Flash, and deep power-down current of 360 nA - enabling multi-year coin-cell operation in smart locks and Zigbee/Thread sensor nodes.
For engineers reviewing the K32W041AMZ datasheet, K32W041AMZ pinout, K32W041AMZ application, or K32W041AMZ equivalent, this page delivers verified technical context, validated pin functions, real-world use-value per application, and two confirmed alternative parts with documented functional and architectural differences for secure, low-power wireless design selection.
Technical Context
The K32W041AMZ integrates dual protocol stacks (IEEE 802.15.4-2011 and BLE 5.0) on a single Arm Cortex-M4 core running at up to 48 MHz, with hardware-accelerated MAC, AES-128/192/256 encryption, SHA-1/SHA-256 hashing, and dedicated low-power timers synchronized to the BLE link layer. Its RF transceiver supports antenna diversity control and integrated balun, operating across 2.4 GHz ISM band.
It features a dual-channel PDM microphone interface with hardware voice activity detection, 5-channel 12-bit ADC (190 ksamples/s), one analog comparator (external positive input only), and 18 GPIOs - all managed via a unified power controller supporting Sleep, Deep-sleep, Power-down, and Deep-power-down modes with wake-up from I²C, USART, SPI, or GPIO.
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 without external host MCU. |
| Memory | 640 KB Flash + 1 MB Data Flash + 152 KB SRAM - supports OTA firmware updates, persistent configuration storage, and complex mesh networking buffers. |
| RF Performance | +15 dBm transmit power / −97 dBm BLE RX sensitivity at 1 Mbps - achieves >46 dB link budget for robust indoor coverage in home automation. |
| Power Consumption | 360 nA deep power-down current with IO wake-up - extends CR2032 battery life beyond 5 years in intermittently active sensor endpoints. |
| Analog Peripherals | 5-input 12-bit ADC (190 ksamples/s), 1 analog comparator, temperature/battery sensors - enables local environmental monitoring without external signal conditioning. |
| Digital Interfaces | 2× I²C, 2× USART (one with flow control), 2× SPI, 1× QSPIFI, ISO7816, DMIC - supports secure smart card readers, voice-enabled edge devices, and multi-sensor hub architectures. |
| Security | Hardware AES-128/192/256, SHA-1/SHA-256 accelerators, 128-bit eFuse key storage - meets PSA Level 3 and SESIP requirements for certified IoT device authentication. |
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 |
|---|---|---|
| RF_IO | RF antenna interface | Single-ended 2.4 GHz RF I/O node connected directly to transceiver; requires matching network to 50 Ω antenna. |
| VDD(RADIO) | Radio supply voltage | Dedicated 1.8 V supply rail for RF section; decoupling critical for EMI suppression and sensitivity stability. |
| XTAL_P / XTAL_N | 32 MHz crystal oscillator inputs | Drive internal RF PLL and system clock; require external 32 MHz crystal with load capacitance matching internal caps. |
| XTAL_32K_P / XTAL_32K_N | 32.768 kHz RTC crystal inputs | Enable precise sleep timing and BLE advertising interval accuracy during ultra-low-power operation. |
| PIO0–PIO19 | Configurable GPIOs | 18 programmable digital I/Os (K32W041AMZ variant); support PWM, UART, SPI, I²C, ADC, comparator, and antenna diversity control signals. |
| RSTN | Active-low reset input | Asynchronous hardware reset; must be held low ≥100 ns for reliable cold start or brown-out recovery. |
| VDDE | IO supply voltage | 3.3 V tolerant digital I/O rail; supports mixed-voltage interfacing with external sensors and peripherals. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-protocol radio stack | Simultaneous IEEE 802.15.4 and BLE 5.0 operation enables interoperable Thread/Zigbee/BLE gateway devices with single hardware BOM. |
| Hardware security engine | AES-128/192/256 + SHA-1/SHA-256 accelerators offload crypto processing from CPU, reducing latency and power in secure boot and OTA update flows. |
| Ultra-low-power audio interface | Dual-channel PDM microphone input with hardware voice activity detection reduces average current by disabling processing during silence - critical for battery-powered voice remotes. |
| Antenna diversity control | Dedicated ADE/ADO outputs drive external RF switches to select optimal antenna path, improving link reliability in obstructed environments. |
| Deep power-down mode | 360 nA retention current with GPIO wake-up allows event-driven operation - e.g., door lock actuation triggers full wake without periodic polling. |
Applications
| Smart Lock Control | Zigbee/Thread Sensor Node |
|---|---|
|
Use Scenario: Battery-powered electronic deadbolt with BLE provisioning and Zigbee 3.0 reporting to hub. IC Role / Device Role / Timing Role: Primary wireless MCU executing BLE pairing, Zigbee commissioning, and local access control logic. Use Value: 360 nA deep power-down extends CR2032 life >5 years; +15 dBm output ensures reliable 15 m range through wood/metal doors. |
Use Scenario: Occupancy and temperature sensor deployed in HVAC ducts with mesh routing capability. IC Role / Device Role / Timing Role: Edge node running Thread Border Router agent and sensor fusion firmware. Use Value: Dual-protocol support enables seamless integration into both Amazon Sidewalk and Matter ecosystems; 5-channel ADC reads thermistor, humidity, and motion signals concurrently. |
| BLE Voice Remote | Secure Smart Card Reader |
|
Use Scenario: TV remote with push-to-talk voice command using onboard microphone. IC Role / Device Role / Timing Role: Audio front-end processor with PDM mic interface, VAD, and BLE 5.0 high-data-rate streaming. Use Value: Hardware VAD cuts average current by 65% vs. continuous sampling; 2 Mb/s BLE PHY enables sub-50 ms voice packet transmission. |
Use Scenario: Access control terminal reading ISO7816 smart cards with cryptographic verification. IC Role / Device Role / Timing Role: Secure element co-processor managing ISO7816 physical layer, AES decryption, and key storage. Use Value: Integrated ISO7816 interface + eFuse key storage eliminates external secure IC; hardware SHA-256 validates card certificates in <10 ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFR32MG21A020F768IM32 | SiP with integrated 2.4 GHz radio, 768 KB Flash, 64 KB RAM, no Data Flash; supports Zigbee/Thread only (no BLE). | Lacks BLE 5.0 stack and hardware VAD; optimized for pure mesh networks without smartphone provisioning. | Select when BLE connectivity is unnecessary and RF layout simplicity outweighs dual-protocol flexibility. |
| CC2652RB1R | TI SimpleLink MCU with integrated BAW resonator (no external 32 MHz crystal required); 352 KB Flash, 80 KB RAM, no Data Flash. | Eliminates crystal BOM but lacks 1 MB Data Flash for large OTA images and has lower RF output (+10 dBm max). | Prefer for cost-sensitive designs where crystal omission reduces bill-of-materials and board area is constrained. |
Compared with EFR32MG21A020F768IM32 and CC2652RB1R, the K32W041AMZ uniquely combines BLE 5.0 + IEEE 802.15.4 dual-stack operation, 1 MB Data Flash for field-upgradable security keys, and hardware VAD for voice-edge applications - making it the only option among the three qualified for Matter-over-Thread/BLE hybrid gateways.
Availability
K32W041AMZ is available at Aetrix Electronics and suitable for smart lock control, Zigbee/Thread sensor nodes, BLE voice remotes, and secure smart card reader applications requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial and consumer OEM programs.
Supply support for K32W041AMZ 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The K32W series is designed specifically for ultra-low-power, multi-protocol wireless edge devices - targeting certified Matter, Zigbee 3.0, Thread, and BLE 5.0 end-products with built-in security and long battery life.
FAQ
What wireless protocols does the K32W041AMZ support simultaneously?
The K32W041AMZ supports IEEE 802.15.4-2011 and Bluetooth Low Energy 5.0 concurrently on a single chip, enabling dual-stack operation for Matter-over-Thread/BLE gateways and interoperable smart home devices. It does not support Zigbee or Thread protocol stacks directly - those run as software layers atop the IEEE 802.15.4 PHY/MAC provided by the K32W041AMZ hardware.
Does the K32W041AMZ include integrated flash memory for OTA updates?
Yes, the K32W041AMZ includes 640 KB of embedded Flash for application code and stack execution, plus an additional 1 MB of dedicated Data Flash for storing OTA firmware images, cryptographic keys, and persistent configuration data - enabling secure, atomic firmware updates without external memory.
What is the minimum supply current in deep power-down mode for the K32W041AMZ?
The K32W041AMZ draws 360 nA in deep power-down mode with wake-up enabled on selected GPIOs. This specification is measured under defined conditions (VDD = 3.0 V, TAMB = 25 °C) and enables multi-year operation on standard coin-cell batteries in infrequently active endpoints like door sensors or leak detectors.
How many ADC channels does the K32W041AMZ provide, and what is their resolution?
The K32W041AMZ provides five 12-bit ADC input channels (ADC0–ADC4), capable of sampling at up to 190 ksamples/s. Unlike the K32W041A variant (which offers eight channels), the AMZ version trades two ADC inputs for additional Data Flash capacity - a deliberate trade-off for applications prioritizing secure firmware storage over analog channel count.
Is the K32W041AMZ pin-compatible with the K32W041A series?
No, the K32W041AMZ is not pin-compatible with the base K32W041A. While both use the same 40-pin HVQFN package, the K32W041AMZ replaces two ADC pins (ADC5 and CLK_IN) with FLASH_RSTN and FLASH_CSN to support its integrated 1 MB Data Flash, altering the pin mapping for those specific functions - requiring PCB layout revision for migration.
K32W041AMZ 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)
K32W041AMZ FAQ
1.How can I place an order for K32W041AMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for K32W041AMZ 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 K32W041AMZ reliable?
The price and inventory of K32W041AMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for K32W041AMZ is usually 5 days.
3.What payment methods are accepted for K32W041AMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for K32W041AMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for K32W041AMZ?
K32W041AMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your K32W041AMZ 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 K32W041AMZ?
For technical support, including K32W041AMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your K32W041AMZ requirements.
6.How does Aetrix verify that K32W041AMZ is sourced from the original manufacturer or authorized distributors?
All K32W041AMZ 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 K32W041AMZ meets industry standards.
7.What is the process for return or replacement of K32W041AMZ?
All K32W041AMZ units undergo pre-shipment inspection (PSI). If there is an issue with K32W041AMZ, 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 K32W041AMZ part is unused and in its original packaging.
Return procedure for K32W041AMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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