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NXP Semiconductors MKW37A512VFT4R
- Part No.:
- MKW37A512VFT4R
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
MKW37A512VFT4R.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 48VFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,564
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Product details
Overview
MKW37A512VFT4 from NXP Semiconductors is an AEC-Q100 Grade 2 qualified Bluetooth® Low Energy 5.0 wireless microcontroller featuring a 48 MHz Arm® Cortex®-M0+ core, 512 KB flash memory, integrated 2.4 GHz radio with –105 dBm LR 125 kbit/s sensitivity, and ultra-low-power operation down to 266.6 nA in VLLS0 mode - deployed in automotive digital key and industrial sensor edge nodes.
For engineers reviewing the MKW37A512VFT4 datasheet, MKW37A512VFT4 pinout, MKW37A512VFT4 application, or MKW37A512VFT4 equivalent, this page delivers verified specifications, validated package mapping, confirmed automotive qualification status, and real-world design context for Bluetooth LE 5.0 system integration, low-power RF coexistence, and secure over-the-air firmware updates.
Technical Context
The MKW37A512VFT4 implements a dual-clock domain architecture: a 32.768 kHz crystal oscillator maintains precise BLE timing during deep-sleep modes, while 26/32 MHz crystals drive the radio and MCU in active states. Its radio subsystem supports all Bluetooth LE 5.0 optional features - including Long Range (125/500 kbit/s), Advertising Extensions, and Channel Selection Algorithm #2 - with hardware-accelerated AES-128 and TRNG enabling LE Secure Connections.
System-level power optimization is achieved via nine MCU low-power modes, an integrated DC-DC buck converter (reducing Rx current to 6.3 mA at 3.6 V), and peripheral clock gating. Unlike KW38, MKW37A512VFT4 omits FlexCAN and second LPUART, confirming its role as a dedicated BLE 5.0 endpoint without CAN FD or dual-serial host bridging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm® Cortex®-M0+, up to 48 MHz - enables real-time BLE protocol stack execution with minimal latency. |
| Flash Memory | 512 KB program flash with ECC - supports full BLE 5.0 stack + application code + OTA update partitioning. |
| BLE Receiver Sensitivity | –105 dBm @ 125 kbit/s LR PHY - extends indoor range to >100 m in line-of-sight automotive access scenarios. |
| Low-Power Mode Current | 266.6 nA in VLLS0 - enables multi-year battery life on coin-cell power for passive entry systems. |
| Operating Voltage | 1.71 V to 3.6 V - compatible with single Li-ion or 2×AA alkaline supply without external regulators. |
| Temperature Range | –40 °C to +105 °C - meets AEC-Q100 Grade 2 requirements for under-hood and cabin-mounted automotive modules. |
| Security | AES-128 hardware accelerator + TRNG + 80-bit unique ID - enables FIPS-compliant key generation and secure device provisioning. |
Pinout & Package
Package: 48-pin "Wettable" HVQFN, 7×7 mm, 0.5 mm pitch - optimized for automated optical inspection (AOI) and high-reliability automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_0, VDD_1, VDDA | Analog & digital supply rails | Support independent 1.71–3.6 V operation; VDDA powers ADC/CMP for noise isolation. |
| RF_IN/OUT | Single-ended bidirectional RF port | Integrated balun eliminates external matching network - reduces BOM cost and PCB area by ≥3 components. |
| XTAL32K | 32.768 kHz crystal input | Enables precise BLE advertising interval timing and RTC wake-up during VLLS0 sleep. |
| SWD_DIO / SWD_CLK | Serial Wire Debug interface | Two-pin debug access enables in-system programming and trace without sacrificing GPIO count. |
| PTE0–PTE7, PTB0–PTB15, PTA0–PTA7 | GPIO bank terminals | 25 configurable digital I/O pins in 48-pin package - sufficient for button sensing, LED control, and sensor interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Bluetooth LE 5.0 Long Range | Hardware-coded PHY support (125/500 kbit/s) enables 4× range extension vs. legacy 1 Mbit/s mode - critical for vehicle proximity detection. |
| On-chip Balun + Single-Ended RF Port | Eliminates discrete balun, matching capacitors, and RF switch - reduces RF BOM to one external antenna feed. |
| DC-DC Buck Converter | Reduces peak Rx current to 6.3 mA at 3.6 V - extends CR2032 battery life from months to years in key fob applications. |
| Hardware AES-128 + TRNG | Accelerates LE Secure Connections pairing and encrypted OTA firmware delivery - prevents replay and man-in-the-middle attacks. |
| 9 Low-Power Modes (incl. VLLS0) | Allows sub-μA retention of BLE connection state and RTC alarm - enables instant wake-on-advertising without full boot sequence. |
Applications
| Digital Key FOB | Industrial Wireless Sensor Node |
|---|---|
Use Scenario: Smartphone-based vehicle unlock/start using BLE proximity detection within 10 m. IC Role / Device Role / Timing Role: Standalone BLE 5.0 endpoint managing secure pairing, encrypted advertising, and low-latency connection handover. Use Value: 266.6 nA VLLS0 current enables >5-year CR2032 battery life; –105 dBm LR sensitivity ensures reliable detection at car door handle. | Use Scenario: Battery-powered temperature/humidity monitor transmitting data hourly to gateway. IC Role / Device Role / Timing Role: Integrated MCU+radio executing sensor read, BLE advertisement burst, and deep-sleep scheduling. Use Value: 512 KB flash stores full BLE stack + sensor fusion algorithm + OTA update image; DC-DC buck cuts average current to <10 μA. |
| Smart Tire Pressure Monitor (TPMS) | Medical Body Area Network (MBAN) |
Use Scenario: Wheel-mounted pressure/temperature sensor reporting via BLE to vehicle ECU. IC Role / Device Role / Timing Role: Automotive-grade endpoint with AEC-Q100 Grade 2 qualification, operating at 105 °C ambient. Use Value: 105 °C rating ensures reliability inside wheel well; hardware TRNG/AES secures sensor data against spoofing. | Use Scenario: Wearable patient monitor transmitting vital signs in 2360–2400 MHz MBAN band. IC Role / Device Role / Timing Role: Generic FSK transceiver supporting 250 kbit/s GFSK-BT=0.5 with –101 dBm sensitivity. Use Value: Dual-band capability (2.4 GHz BLE + 2360–2400 MHz MBAN) enables regulatory-compliant medical telemetry without external RF IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Bluetooth LE 5.0 wireless microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MKW38A512VFT4 | Includes FlexCAN module and second LPUART; identical 512 KB flash, same package and BLE radio specs. | Required where CAN FD bus integration (e.g., vehicle body control module) is needed alongside BLE. | Select MKW38A512VFT4 only if CAN FD communication with ECUs is mandatory - adds no benefit for pure BLE endpoint use. |
| NRF52840-QIAA | 2.4 GHz multiprotocol SoC (BLE 5.0, Thread, Zigbee); 1 MB flash, 256 KB RAM; no AEC-Q100 qualification. | Suitable for consumer IoT but not automotive due to lack of Grade 2 qualification and lower –96 dBm LR sensitivity. | Choose NRF52840-QIAA for cost-sensitive non-automotive designs requiring larger memory or multi-protocol flexibility. |
Compared with MKW37A512VFT4, MKW38A512VFT4 adds CAN FD at identical RF performance and qualification, while NRF52840-QIAA trades automotive reliability for broader protocol support and higher memory - making MKW37A512VFT4 the optimal choice for AEC-Q100-compliant BLE-only endpoints demanding ultra-low-power operation and long-range sensitivity.
Availability
MKW37A512VFT4 is available at Aetrix Electronics and suitable for automotive digital key systems, industrial wireless sensors, TPMS modules, and medical MBAN devices requiring stable component supply across extended production lifecycles.
Supply support for MKW37A512VFT4 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The MKW37A512VFT4 belongs to the Kinetis KW3x family - designed specifically for ultra-low-power, AEC-Q100-qualified Bluetooth LE 5.0 endpoints in automotive access and industrial telemetry applications.
FAQ
What is the maximum Bluetooth LE transmit power supported by MKW37A512VFT4?
MKW37A512VFT4 supports programmable transmitter output power from –30 dBm to +5 dBm. This 35 dB dynamic range enables precise RF link budget tuning for different antenna configurations and regulatory compliance - for example, +5 dBm is used for long-range vehicle proximity detection, while –30 dBm minimizes interference in dense sensor deployments. The value is measured and specified in the official NXP datasheet Rev. 7 (2020).
Does MKW37A512VFT4 include CAN FD capability?
No, MKW37A512VFT4 does not include FlexCAN or CAN FD support. Per the KW39/38/37 part number matrix in the datasheet, only MKW38 variants (e.g., MKW38A512VFT4) integrate the FlexCAN module. MKW37A512VFT4 is optimized as a dedicated BLE 5.0 endpoint without CAN interface - confirmed by its "N" entry under CAN FD column and absence of CAN-related peripherals in its block diagram.
What package type and dimensions does MKW37A512VFT4 use?
MKW37A512VFT4 uses a 48-pin "Wettable" HVQFN package measuring 7×7 mm with 0.5 mm pitch. This package supports automated optical inspection (AOI) and is qualified for automotive reflow profiles. The "VFT4" suffix explicitly denotes this variant, and mechanical details are documented in NXP's official package drawing for SOT632-2.
Is MKW37A512VFT4 qualified for automotive applications?
Yes, MKW37A512VFT4 is AEC-Q100 Grade 2 qualified, rated for operation from –40 °C to +105 °C ambient temperature. This qualification is explicitly stated in the KW39/38/37 part number table and confirmed in Section 1 (Introduction) of the datasheet, which identifies the device as targeting automotive digital key and TPMS applications requiring robust thermal and reliability validation.
How much SRAM and flash memory does MKW37A512VFT4 provide?
MKW37A512VFT4 integrates 64 KB of on-chip SRAM and 512 KB of program flash memory with ECC protection. Unlike KW39/KW38, it does not include FlexNVM or FlexRAM - instead allocating the full 512 KB flash for application and BLE stack storage, and providing 8 KB of program acceleration RAM for flash read optimization. These values are specified in Section 2.3 (Microcontroller features) of the datasheet.
MKW37A512VFT4R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- Kinetis KW3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 48MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, LVD, POR, PWM, WDT
- Number of I/O:
- -
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
MKW37A512VFT4R FAQ
1.How can I place an order for MKW37A512VFT4R through Aetrix?
Please submit a Request for Quotation (RFQ) for MKW37A512VFT4R 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 MKW37A512VFT4R reliable?
The price and inventory of MKW37A512VFT4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MKW37A512VFT4R is usually 5 days.
3.What payment methods are accepted for MKW37A512VFT4R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MKW37A512VFT4R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MKW37A512VFT4R?
MKW37A512VFT4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MKW37A512VFT4R 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 MKW37A512VFT4R?
For technical support, including MKW37A512VFT4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MKW37A512VFT4R requirements.
6.How does Aetrix verify that MKW37A512VFT4R is sourced from the original manufacturer or authorized distributors?
All MKW37A512VFT4R 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 MKW37A512VFT4R meets industry standards.
7.What is the process for return or replacement of MKW37A512VFT4R?
All MKW37A512VFT4R units undergo pre-shipment inspection (PSI). If there is an issue with MKW37A512VFT4R, 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 MKW37A512VFT4R part is unused and in its original packaging.
Return procedure for MKW37A512VFT4R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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