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NXP Semiconductors MKW31Z512VHT4
- Part No.:
- MKW31Z512VHT4
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 64-VFLGA
- Datasheet:
-
MKW31Z512VHT4.pdf
- Description:
- IC RF TXRX+MCU BLE 64VFLGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MKW31Z512VHT4 from NXP Semiconductors is a Bluetooth Low Energy (BLE) v4.2 and Generic FSK System-on-Chip (SoC) integrating an ARM Cortex-M0+ core running at up to 48 MHz, 512 KB on-chip Flash, 128 KB SRAM, and a 2.4 GHz transceiver with -95 dBm BLE sensitivity and programmable output power from -30 dBm to +3.5 dBm. It targets ultra-low-power wireless sensor nodes in portable health monitors and wearable fitness devices.
For engineers reviewing the MKW31Z512VHT4 datasheet, MKW31Z512VHT4 pinout, MKW31Z512VHT4 application, or MKW31Z512VHT4 equivalent, key selection criteria include its 48-pin LQFN package, dual-standard radio support (BLE + FSK only), VLLS0 low-power mode current of 182 nA, integrated DC-DC buck/boost converter, and hardware AES-128 acceleration for secure edge sensing.
Technical Context
The MKW31Z512VHT4 implements a single-chip BLE v4.2 Link Layer with two independent hardware connection engines and supports Generic FSK at 250/500/1000 kbps using GFSK modulation indices of 0.32, 0.5, or 0.7 - but excludes IEEE 802.15.4 O-QPSK and Thread/Zigbee protocol acceleration found in MKW41Z variants. Its radio uses an on-chip balun with a single-ended bidirectional RF port and supports 26 MHz or 32 MHz crystal references.
System-level power management includes nine low-power modes, with VLLS0 drawing just 182 nA, and a configurable DC-DC converter operating in Buck (2.1–4.2 V input), Boost (0.9–1.795 V input), or Bypass modes. The MCU integrates a 16-bit ADC, 12-bit DAC, six-channel TPM, LPUART, two SPI, two I²C, and TRNG/AES-128 security accelerators - all accessible within the 48-pin 7×7 mm LQFN package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Radio Standards | BLE v4.2 compliant; Generic FSK only - no IEEE 802.15.4 or Thread/Zigbee hardware acceleration |
| Receiver Sensitivity | -95 dBm (BLE); -100 dBm (250 kbps GFSK, h=0.5) - enables robust link budget in compact battery-powered designs |
| Transmit Power Range | -30 dBm to +3.5 dBm programmable - allows precise RF range tuning without external PA/LNA |
| MCU Core | ARM Cortex-M0+ @ up to 48 MHz - delivers deterministic real-time response with <2.1 µA/MHz active current |
| Memory | 512 KB Flash / 128 KB SRAM - sufficient for BLE stack + application firmware with field-upgrade capability |
| Low-Power Mode | VLLS0 current = 182 nA - supports multi-year operation on coin-cell batteries in periodic-sensing applications |
| Supply Voltage | 0.9 V to 4.2 V - compatible with single alkaline (Boost), coin-cell (Buck), or Li-ion (Bypass) power sources |
Pinout & Package
Package: 48-pin Laminate QFN, 7 mm × 7 mm × 0.98 mm, 0.5 mm pitch. Pinout validated per NXP MKW41Z/31Z/21Z Data Sheet Rev. 4 (2018), Section 8.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_0, VDD_1, VDDA | Analog & digital supply rails | Support independent noise filtering; VDDA powers ADC/DAC/VREF for precision analog acquisition |
| RF_IN/OUT | Single-ended bidirectional RF port | Connects directly to antenna via matching network; eliminates need for external balun or switch |
| XTAL_IN/XTAL_OUT | 26/32 MHz crystal oscillator interface | Required for BLE/FSK timing; supports low-ESR crystals down to 12 pF load capacitance |
| RESET_b | Active-low reset input | Asynchronous reset with internal pull-up; debounced externally for reliable brownout recovery |
| SWD_DIO/SWD_CLK | Serial Wire Debug interface | Two-pin debug access for flash programming and real-time trace via Micro Trace Buffer (MTB) |
| PTE0–PTE31, PTB0–PTB15 | GPIO multiplexed I/O | 26 total GPIOs in 48-pin package; support UART, SPI, I²C, ADC, TPM, TSI, and wake-up interrupt functions |
Key Features
| Feature | Design Value |
|---|---|
| On-chip balun with single-ended RF port | Reduces BOM count by eliminating external balun and RF switch - cuts PCB area and layout complexity |
| Dual-mode DC-DC converter (Buck/Boost) | Enables single-cell operation across chemistries: CR2032 (Buck), AA/AAA (Boost), or Li-ion (Bypass) |
| Hardware AES-128 + TRNG accelerator | Offloads encryption from CPU - achieves sub-100 µs AES-CCM encryption while preserving low-power runtime |
| 16-bit ADC with hardware averaging & temperature sensor | Delivers ±1.5 LSB INL over temperature - suitable for calibrated biometric sensing without external reference |
| VLLS0 mode @ 182 nA | Permits wake-on-radio or GPIO events after years of standby - critical for maintenance-free IoT endpoints |
Applications
| Wireless Health Monitor | Smart Remote Control |
|---|---|
Use Scenario: Continuous ECG/SpO₂ monitoring in wrist-worn clinical-grade sensors with daily BLE sync to smartphone. IC Role / Device Role / Timing Role: Standalone SoC handling radio protocol stack, sensor data acquisition, encryption, and ultra-low-power scheduling - no host MCU required. Use Value: 182 nA VLLS0 mode extends battery life beyond 2 years on CR2032; on-chip AES-128 secures patient data before transmission. | Use Scenario: Battery-powered universal remote supporting BLE HID profile and proprietary FSK-based legacy AV equipment control. IC Role / Device Role / Timing Role: Dual-radio coexistence engine managing concurrent BLE advertising and burst-mode FSK command transmission. Use Value: Single 48-pin QFN replaces discrete BLE SoC + FSK transceiver + microcontroller - reduces bill-of-materials and assembly cost. |
| Fitness Tracker | Industrial Sensor Node |
Use Scenario: Motion-capture wearable logging accelerometer/gyro data locally and transmitting summaries via BLE every 5 minutes. IC Role / Device Role / Timing Role: Real-time motion processing unit with LPUART for sensor fusion, TPM for activity timing, and BLE for scheduled uploads. Use Value: 48 MHz Cortex-M0+ executes sensor algorithms in <50 µs; 512 KB Flash stores firmware + encrypted log buffer. | Use Scenario: Wireless temperature/humidity node deployed in factory environments with 10-year battery life requirement. IC Role / Device Role / Timing Role: Autonomous edge node performing ADC sampling, CRC validation, AES-CCM encryption, and scheduled BLE advertisements. Use Value: -95 dBm BLE sensitivity ensures reliable 30 m indoor range; DC-DC Boost mode sustains operation down to 0.9 V battery voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BLE + FSK wireless SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MKW41Z512VHT4 | Includes IEEE 802.15.4 O-QPSK hardware acceleration and dual-PAN support; same 512 KB Flash/128 KB SRAM and 48-pin LQFN package | Required for Thread or Zigbee 3.0 mesh networking; not needed for BLE-only or proprietary FSK systems | Select MKW41Z512VHT4 only if 802.15.4 protocol offload is mandatory - adds silicon cost without benefit for pure BLE/FSK use cases |
| MKW31Z512CAT4 | Same radio features and MCU specs, but in 75-pin WLCSP (3.893 × 3.797 mm); operates from –40 to 85 °C vs. –40 to 105 °C for VHT4 | Suitable for space-constrained consumer wearables; unsuitable for industrial ambient temperature requirements | Choose MKW31Z512CAT4 for ultra-compact PCBs where thermal margin >85 °C is not required |
Compared with MKW41Z512VHT4 and MKW31Z512CAT4, the MKW31Z512VHT4 provides optimal balance of BLE/FSK performance, extended temperature rating, and standard LQFN manufacturability - making it the preferred choice for ruggedized portable medical and industrial wireless sensors.
Availability
MKW31Z512VHT4 is available at Aetrix Electronics and suitable for wireless health monitors, smart remote controls, fitness trackers, and industrial sensor nodes requiring stable component supply across long production lifecycles.
Supply support for MKW31Z512VHT4 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 MKW31Z series belongs to NXP's KW41Z/31Z/21Z family of ultra-low-power multi-standard SoCs designed specifically for battery-operated BLE and proprietary FSK wireless sensor applications - emphasizing minimal external components, certified radio stacks, and long-term industrial temperature support.
FAQ
What radio standards does the MKW31Z512VHT4 support?
The MKW31Z512VHT4 supports Bluetooth Low Energy v4.2 and Generic FSK modulation at 250/500/1000 kbps. It does not implement IEEE 802.15.4 O-QPSK hardware acceleration or Thread/Zigbee protocol offload - those capabilities are exclusive to the MKW41Z variant. Its radio is fully certified for BLE v4.2 and includes hardware connection engines for up to two simultaneous BLE links.
What is the operating temperature range for MKW31Z512VHT4?
The MKW31Z512VHT4 is rated for –40 °C to +105 °C when packaged in the 48-pin Laminate QFN (VHT4 suffix). This extended temperature range is validated per NXP's datasheet Rev. 4 and makes MKW31Z512VHT4 suitable for industrial and automotive-adjacent applications where ambient conditions exceed consumer-grade limits.
Does MKW31Z512VHT4 include hardware security accelerators?
Yes, MKW31Z512VHT4 integrates a dedicated AES-128 hardware accelerator supporting ECB, CBC, CTR, CCM, and GCM modes, plus a True Random Number Generator (TRNG) that delivers 512-bit entropy blocks. These modules enable cryptographic operations with sub-100 µs latency and eliminate software-based RNG vulnerabilities - essential for secure BLE pairing and over-the-air firmware updates.
What package type and pin count does MKW31Z512VHT4 use?
MKW31Z512VHT4 uses a 48-pin Laminate QFN package measuring 7 mm × 7 mm × 0.98 mm with 0.5 mm pitch. This package is RoHS-compliant, reflow-solderable, and validated for high-volume manufacturing. It provides 26 GPIOs with full peripheral multiplexing including SPI, I²C, LPUART, ADC, and TPM - confirmed in NXP's MKW41Z/31Z/21Z Data Sheet Section 8.1.
How does the DC-DC converter in MKW31Z512VHT4 improve battery life?
The MKW31Z512VHT4's integrated DC-DC converter operates in Buck mode (2.1–4.2 V input) to reduce Rx/Tx current by ~25%, enabling multi-year operation on CR2032 coin cells. In Boost mode (0.9–1.795 V input), it sustains full functionality down to near-dead alkaline battery voltage - extending usable battery life by 30–40% compared to linear regulation. Both modes are software-configurable and require only one external inductor.
MKW31Z512VHT4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- Kinetis KW31Z
- Package/Case:
- 64-VFLGA
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth
- Protocol:
- Bluetooth v4.2
- Modulation:
- FSK, GFSK, MSK, O-QPSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 1Mbps
- Power - Output:
- 3.5dBm
- Sensitivity:
- -95dBm
- Memory Size:
- 512kB Flash, 128kB RAM
- Serial Interfaces:
- I2C, SPI, UART
- GPIO:
- -
- Voltage - Supply:
- 1.71V ~ 3.6V
- Current - Receiving:
- 6.2mA
- Current - Transmitting:
- 6mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 64-VFLGA (7x7)
MKW31Z512VHT4 FAQ
1.How can I place an order for MKW31Z512VHT4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MKW31Z512VHT4 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 MKW31Z512VHT4 reliable?
The price and inventory of MKW31Z512VHT4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MKW31Z512VHT4 is usually 5 days.
3.What payment methods are accepted for MKW31Z512VHT4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MKW31Z512VHT4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MKW31Z512VHT4?
MKW31Z512VHT4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MKW31Z512VHT4 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 MKW31Z512VHT4?
For technical support, including MKW31Z512VHT4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MKW31Z512VHT4 requirements.
6.How does Aetrix verify that MKW31Z512VHT4 is sourced from the original manufacturer or authorized distributors?
All MKW31Z512VHT4 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 MKW31Z512VHT4 meets industry standards.
7.What is the process for return or replacement of MKW31Z512VHT4?
All MKW31Z512VHT4 units undergo pre-shipment inspection (PSI). If there is an issue with MKW31Z512VHT4, 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 MKW31Z512VHT4 part is unused and in its original packaging.
Return procedure for MKW31Z512VHT4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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