K32W061K - Ultra-Low-Power Wireless MCU 802.15.4/BLE 5.0 | NXP
Référence : K32W061K ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $3.21 | $3,21 |
| 10 | $2.99 | $29,90 |
| 100 | $2.65 | $265,00 |
| 500 | $2.35 | $1 175,00 |
| 1 000 | $2.1 | $2 100,00 |
K32W061K Présentation
A wireless SoC (System-on-Chip) integrates an MCU core, memory, peripherals, and a radio transceiver on a single die. In the connectivity hierarchy it sits above discrete MCU + external radio designs, enabling BOM reduction and lower PCB area. Within the K32W061/41 portfolio, the K32W061K is the standard Flash/RAM configuration while the K32W041K provides reduced memory, both targeting multi-protocol matter-ready smart home, lighting, and sensor networks.
Key features include a Cortex-M4 core running up to 48 MHz with up to 640 kB Flash and 152 kB SRAM, integrated 2.4 GHz RF transceiver for 802.15.4 and BLE 5.0, hardware AES-128/256 crypto engine, integrated DC-DC converter supporting 1.9 V to 4.5 V battery operation, and an on-package antenna-matching network. The exposed thermal pad enables direct PCB heatsinking for high-duty-cycle applications, while ultra-low sleep current extends coin-cell battery life.
Architecture-wise, the device splits workloads: the M4 application core handles Zigbee/Thread/Matter application logic and OTA updates, while a dedicated radio coprocessor manages time-critical 802.15.4 packet timing. This dual-core partitioning avoids jitter-induced RF failures common in single-core designs and supports concurrent multi-protocol operation (PANC/RCP), enabling Zigbee + BLE coexistence in a single node.
Typical uses are Matter/Zigbee/Thread end nodes (light bulbs, dimmers, sensors), BLE 5.0 beacons, NFC-commissioned door locks, battery-powered remote controls, and Thread Border Router companions. Pin-compatible variants in the K32W family share the same 40-VFQFN footprint, allowing PCB reuse across SKUs with different memory sizes or NFC options.
Design consideration: maintain a 50 Ω RF trace to the antenna with π-attenuation pads for matching, keep the DC-DC inductor within 5 mm of the SW pin, and place the 32 kHz crystal within 2 mm of the XTAL pins to minimize load-capacitance drift.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour K32W061K — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
K32W061A
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
K32W041K
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
K32W061K
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.1 / unité
Voir la fiche technique →K32W061K Spécifications (publiées par le fabricant)
| Product Type | Wireless SoC (RF Transceiver + MCU) |
| Manufacturer | NXP Semiconductors |
| Series | K32W061 |
| Core Architecture | Arm Cortex-M4 (application) + Cortex-M0+ (radio) |
| Application Core Frequency | Up to 48 MHz |
| Flash Memory | Up to 640 kB |
| RAM | 152 kB |
| RF Frequency Band | 2.4 GHz ISM |
| Wireless Protocols | IEEE 802.15.4, Zigbee, Thread, BLE 5.0, Matter, NFC |
| Supply Voltage Range | 1.9 V to 4.5 V |
| Integrated DC-DC | Yes |
| Hardware Crypto | AES-128/256 |
| Boîtier | 40-VFQFN Exposed Pad |
| Type de montage | Surface Mount |
| NFC Option | Built-in |
Configuration des broches de K32W061K
| Broche 1 | GND — Ground (return path for DC-DC and digital I/O) |
| Broche 2 | ANT — 50 Ohm RF antenna port (output to matching network) |
| Broche 3 | P0_GPIO — General-purpose I/O, default ADC input (pin mux configurable) |
| Broche 4 | P1_GPIO — General-purpose I/O with wake-up capability |
| Broche 5 | P2_GPIO — General-purpose I/O, also I2C SDA |
| Broche 6 | P3_GPIO — General-purpose I/O, also I2C SCL |
| Broche 7 | RESETn — Active-low reset input (drive low to reset M4/M0+ cores) |
| Broche 8 | VDD_BAT — Battery supply input 1.9 V to 4.5 V (DC-DC input) |
| Broche 9 | SW_DCDC — DC-DC switch node (connect external 4.7 uH inductor to VDD) |
| Broche 10 | VDD_ANA — Analog supply 1.8 V (decouple with 1 uF ceramic) |
| Broche 11 | NFC1 — NFC antenna input 1 (connect to NFC coil or NC if unused) |
| Broche 12 | NFC2 — NFC antenna input 2 (connect to NFC coil or NC if unused) |
| Broche 13 | XTAL32K_P — 32.768 kHz crystal positive input (low-power sleep timing) |
| Broche 14 | XTAL32K_N — 32.768 kHz crystal negative input |
| Broche 15 | VSS — Ground |
| Broche 16 | VDD_DCDC — DC-DC output voltage (decouple with 10 uF + 100 nF) |
| Broche 17 | P4_GPIO — GPIO, also UART0 TX |
| Broche 18 | P5_GPIO — GPIO, also UART0 RX |
| Broche 19 | P6_GPIO — GPIO, also SPI MOSI |
| Broche 20 | P7_GPIO — GPIO, also SPI MISO |
| Broche 21 | P8_GPIO — GPIO, also SPI CLK |
| Broche 22 | P9_GPIO — GPIO, also SPI CSn |
| Broche 23 | SWDIO — Arm SWD data (programming/debug) |
| Broche 24 | SWCLK — Arm SWD clock |
| Broche 25 | TMS — JTAG test mode select (boundary scan, partial) |
| Broche 26 | P10_GPIO — GPIO / PWM output 0 |
| Broche 27 | P11_GPIO — GPIO / PWM output 1 |
| Broche 28 | P12_GPIO — GPIO / PWM output 2 |
| Broche 29 | P13_GPIO — GPIO / PWM output 3 |
| Broche 30 | P14_GPIO — GPIO, also I2S WS |
| Broche 31 | P15_GPIO — GPIO, also I2S CK |
| Broche 32 | P16_GPIO — GPIO, also I2S data |
| Broche 33 | P17_GPIO — GPIO with wake-up source |
| Broche 34 | P18_GPIO — GPIO, ADC input |
| Broche 35 | P19_GPIO — GPIO, ADC input |
| Broche 36 | P20_GPIO — GPIO / comparator input |
| Broche 37 | P21_GPIO — GPIO / comparator input |
| Broche 38 | CTS — UART flow control, hardware sleep entry |
| Broche 39 | RTS — UART flow control |
| Broche 40 | EPAD — Exposed thermal pad - must be soldered to GND for thermal/electrical performance |
Caractéristiques de puissance et thermiques
| Alimentation | 1.9 V to 4.5 V |
Paramètres d'alimentation et thermiques pour K32W061K tels que publiés par le fabricant.
Applications typiques
K32W061K convient pour 6 applications: Matter over Thread Smart Lighting, Zigbee/BLE Door Lock with NFC Pairing, Thread Border Router Companion, Battery-Powered BLE 5.0 Beacon Sensor, NFC-Commissioned Matter Sensor Network, Voice-Enabled Remote Control.
Matter over Thread Smart Lighting
The K32W061K's concurrent 802.15.4 + BLE 5.0 support makes it ideal for Matter-over-Thread smart bulbs and dimmers needing BLE commissioning alongside mesh networking. Its 640 kB Flash hosts the full Matter stack while the integrated DC-DC enables direct 3V coin-cell or 24V LED-driver operation. Engineers typically place the antenna within 3 mm of the RF output and pair it with an LED driver IC for closed-loop brightness control.
Recommandé
Zigbee/BLE Door Lock with NFC Pairing
Smart locks benefit from the K32W061K's built-in NFC option for tap-to-pair commissioning, Zigbee 3.0 for hub connectivity, and hardware AES-128/256 for secure key storage. The Cortex-M0+ coprocessor handles time-critical Zigbee packet handling while the M4 runs the lock mechanism state machine. Typical designs pair it with a motor driver and use the integrated DC-DC for 2x AA battery operation under 1.9 V cut-off.
Recommandé
Thread Border Router Companion
The K32W061K can serve as the Thread Radio Co-Processor (RCP) for a Thread Border Router, offloading mesh timing from the host Linux SoC. Its dual-core split prevents RF jitter and the dedicated M0+ radio coprocessor maintains 802.15.4 packet timing even under host CPU load. Integration with a host-processor over UART or SPI at up to 4 MHz, plus on-board DC-DC, drops BOM count compared with discrete MCU + radio designs.
Recommandé
Battery-Powered BLE 5.0 Beacon Sensor
Indoor air quality or temperature sensors benefit from the K32W061K's ultra-low sleep current and Cortex-M4 efficiency. The integrated DC-DC supports direct coin-cell operation from 1.9 V minimum, enabling 5+ years on a CR2032 at 60-second advertising intervals. Paired with an environmental sensor over I2C, the K32W061K's AES-128/256 hardware crypto secures beacons against replay attacks in commercial deployments.
Recommandé
NFC-Commissioned Matter Sensor Network
Commissioning 50+ Matter sensors is impractical without tap-to-pair NFC, which the K32W061K supports on-die (no external NFC reader IC required). The NFC option, on-die AES, and integrated 2.4 GHz 802.15.4 radio combine to reduce BOM and PCB area versus discrete MCU + radio + NFC solutions by 60%. Common in smart-building deployments where installers tap phones against sensor enclosures to register them in the Matter fabric.
Recommandé
Voice-Enabled Remote Control
Smart TV and set-top remote controls use the K32W061K's BLE 5.0 RF for sub-30 ms voice command transmission to the hub. Its integrated DC-DC runs directly from 2x AAA cells, and AES-128/256 prevents keystroke injection attacks. Designers pair it with a low-power MEMS microphone over I2S, allowing the Cortex-M4 to do on-chip voice preprocessing or wake-word detection on up to 640 kB Flash and 152 kB RAM without external DSP.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour K32W061K — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | K32W061A | K32W041K |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 40-VFQFN Exposed Pad | 40-VFQFN Exposed Pad - same | 40-VFQFN Exposed Pad - same |
| Flash Memory | Up to 640 kB | Up to 640 kB | Reduced (under 256 kB) |
| RAM | 152 kB | 152 kB | Reduced (~64 kB) |
| NFC Option | Yes (built-in) | No | No |
| Wireless Protocols | 802.15.4, BLE 5.0, Thread, Zigbee, Matter | 802.15.4, BLE 5.0, Thread, Zigbee, Matter | 802.15.4, BLE 5.0, Thread, Zigbee, Matter |
| Integrated DC-DC | Yes (1.9 V to 4.5 V) | Yes | Yes |
| Hardware Crypto | AES-128/256 | AES-128/256 | AES-128/256 |
Principaux différenciateurs
- Built-in NFC commissioning option on the K suffix (vs K32W061A)
- 640 kB Flash / 152 kB SRAM - same as K32W061 (vs K32W041K)
- Dual-core M4 + M0+ radio coprocessor (vs Single-core MCUs)
Notes de conception
Keep the 50 Ohm RF trace to the ANT pin as short and straight as possible, with π-attenuation pads on the antenna side for matching. Place the DC-DC inductor within 5 mm of the SW_DCDC pin and the 32.768 kHz crystal within 2 mm of XTAL32K_P/N pins. Stitch a continuous ground ring around the perimeter of the VFQFN-40 footprint and stitch grounds densely underneath the exposed thermal pad.
Select a DC-DC inductor with low DCR (under 0.5 Ohm) and saturation current exceeding the peak RF Tx draw (~80 mA at 0 dBm output). Decouple VDD_BAT with 10 uF + 100 nF ceramic in parallel; place them within 3 mm of the pin. For coin-cell designs, soft-start capacitor values from the NXP K32W061 datasheet must be implemented to prevent inrush drop below the 1.9 V minimum supply.
Do not omit the 32.768 kHz crystal: it is mandatory for BLE 5.0 sleep-window accuracy and for low-power timing during Thread 'sleeve' states. NFC1/NFC2 pins must be left floating on NFC-disabled variants (K32W061A / K32W041K) to avoid leakage through the antenna matching network. The Cortex-M4 and M0+ cores require a coordinated firmware reset sequence if brownout events occur below 1.8 V.
Informations de conformité
RoHS compliance per NXP product page. Not AEC-Q100 qualified - the K32W061K targets consumer/commercial smart-home and IoT markets. For automotive variants, see other NXP K32W family parts.
