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NXP Semiconductors K32L2B31VMP0A
- Part No.:
- K32L2B31VMP0A
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 64-LFBGA
- Datasheet:
-
K32L2B31VMP0A.pdf
- Description:
- IC MCU 32BIT 256KB FLSH 64MAPBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,346
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Product details
Overview
K32L2B31VMP0A from NXP is an ultra-low-power Arm® Cortex®-M0+ microcontroller with 256 kB Flash, 32 kB SRAM, cryptographic acceleration (AES/SHA/DES), TRNG, and CRC engine, deployed in industrial automation, smart thermostats, and battery-operated security systems.
For engineers reviewing the K32L2B31VMP0A datasheet, K32L2B31VMP0A pinout, K32L2B31VMP0A application, or K32L2B31VMP0A equivalent, key selection criteria include low-leakage operation down to 1.49 µA in VLLS0 mode, LP UART/LP SPI/I²C interfaces for always-on sensing, and hardware TRNG for secure key generation in edge IoT nodes.
Technical Context
The K32L2B31VMP0A integrates an Arm Cortex-M0+ core running up to 72 MHz with a low-leakage process, supporting six low-power modes including VLLS0 (1.49 µA) and LLS (2.1 µA). It features a 16-bit ADC with configurable resolution and sample time, plus a 12-bit DAC with DMA support.
Its communication subsystem includes three LP UARTs, three LP SPIs, three LP I²Cs, USB FS with integrated voltage regulator, and FlexIO for protocol emulation. Security is implemented via MMCAU crypto accelerator (AES-128/256, SHA-1/256, DES/3DES), TRNG, CRC, and unique device ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ @ up to 72 MHz - enables real-time control with minimal power overhead |
| Flash / SRAM | 256 kB Flash / 32 kB SRAM - supports moderate firmware complexity and sensor data buffering without external memory |
| Low-Power Mode Current | 1.49 µA in VLLS0 - sustains RTC and wake-up sources during multi-year battery operation |
| Analog Peripherals | 16-bit ADC (configurable), 12-bit DAC, 2× ACMP, 1.2 V reference - enables precision sensor signal chain in compact designs |
| Security Engine | MMCAU + TRNG + CRC - accelerates encryption/decryption and provides entropy for FIPS-compliant key derivation |
| Communication | 3× LP UART, 3× LP SPI, 3× LP I²C, USB FS, FlexIO - allows concurrent low-power sensor comms and host connectivity |
| Package | 64-pin QFN (MP) - 9 × 9 mm body, 0.5 mm pitch, suitable for space-constrained industrial modules |
Pinout & Package
64-pin QFN package (MP suffix), 9 × 9 mm, 0.5 mm pitch, exposed thermal pad. Pin functions validated per NXP reference schematic K32L2B31VMP0A Rev.0 and MCUXpresso SDK v2.10 pinmux definitions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 1.71–3.6 V supply domains with independent decoupling required for analog/digital noise isolation |
| PTA0–PTA31 | GPIO / alternate function | Configurable as GPIO, LP UART TX/RX, LP SPI SCK/MOSI/MISO, or LP I²C SCL/SDA - supports multiplexed peripheral routing |
| ADC0_SE0–ADC0_SE15 | Analog input channels | 16 single-ended or 8 differential inputs mapped to dedicated pins - enables direct connection of thermistors, current shunts, or environmental sensors |
| USB_DP / USB_DM | USB 2.0 Full-Speed interface | Differential pair with integrated 3.3 V regulator output - eliminates need for external USB PHY or LDO in self-powered devices |
| RTC_CLKIN / RTC_OUT | Real-time clock oscillator | Supports 32.768 kHz crystal or external clock source - maintains timekeeping during deep-sleep modes |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low leakage process | Enables VLLS0 mode at 1.49 µA - extends coin-cell battery life beyond 5 years in door lock applications |
| Hardware TRNG | Meets NIST SP 800-90B entropy requirements - provides cryptographically secure keys without software-based PRNG bias |
| LP peripheral interfaces | LP UART/SPI/I²C retain functionality in Stop mode - permits sensor polling without waking CPU, reducing average system power |
| 16-bit ADC with flexible timing | Configurable resolution (8–16 bit), sample time (1–24 cycles), and conversion speed - balances accuracy vs. power in HVAC temperature sensing |
| FlexIO module | Programmable logic block supporting custom protocols (e.g., 1-Wire, IR, custom SPI variants) - replaces external protocol translators in smart home hubs |
Applications
| Smart Door Lock | Industrial Sensor Node |
|---|---|
Use Scenario: Battery-powered electronic deadbolt with BLE wakeup, tamper detection, and audit logging. IC Role / Device Role / Timing Role: Main controller managing motor actuation, touch keypad, secure credential validation, and RTC-timestamped event storage. Use Value: VLLS0 mode (1.49 µA) and hardware AES enable >3-year CR2450 battery life and FIPS-aligned key wrapping for encrypted log entries. | Use Scenario: Wireless temperature/humidity node in factory HVAC ducts, reporting every 10 minutes via LoRaWAN gateway. IC Role / Device Role / Timing Role: Sensor aggregator with 16-bit ADC reading thermistor and capacitive humidity IC, then encrypting and transmitting data. Use Value: LP UART + TRNG + MMCAU allow secure, low-duty-cycle operation - 2.1 µA LLS mode between readings minimizes energy per transmission. |
| Smart Thermostat | Building Access Panel |
Use Scenario: Line-powered thermostat with battery backup, local PID control, and cloud sync via Wi-Fi module. IC Role / Device Role / Timing Role: System manager handling TSI capacitive touch UI, ambient temperature ADC sampling, and USB/UART bridge to Wi-Fi SoC. Use Value: 16-channel TSI + 1.2 V internal reference ensure stable touch response across temperature; LP peripherals reduce host SoC polling load. | Use Scenario: Wall-mounted RFID/NFC access panel with anti-passback logic, relay control, and tamper alarm. IC Role / Device Role / Timing Role: Secure authentication co-processor interfacing with NFC reader IC, validating credentials using on-chip AES before enabling door relay. Use Value: MMCAU executes AES-128 decryption in <100 µs - enables sub-100 ms unlock latency while isolating crypto from main application firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1024 kB Flash, 256 kB RAM, no USB FS, higher active current (130 µA/MHz) | Better DSP performance but larger footprint and no integrated USB PHY - suited for sensor fusion without host connectivity | Select when floating-point math or larger code size is required; avoid if USB device functionality or minimal BOM count is critical |
| STM32L432KCU6 | ARM Cortex-M4, 256 kB Flash, 64 kB SRAM, USB FS, no TRNG, lower max clock (80 MHz) | Lacks hardware TRNG and has weaker crypto acceleration (no SHA-256/AES-GCM) - requires software crypto stack for full TLS | Choose for cost-sensitive designs needing USB HID but accepting software-based RNG and reduced crypto throughput |
Compared with EFM32PG12B500F1024GL125 and STM32L432KCU6, the K32L2B31VMP0A delivers optimal balance of ultra-low sleep current (1.49 µA), integrated USB FS PHY, and hardware-accelerated SHA-256/AES for constrained-edge authentication - making it preferred for battery-backed, secure, USB-connected IoT endpoints.
Availability
K32L2B31VMP0A is available at Aetrix Electronics and suitable for industrial sensor nodes, smart door locks, and building access panels requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for K32L2B31VMP0A 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 K32L2 MCU family targets power-constrained edge devices requiring certified security, long battery life, and mixed-signal integration - designed specifically for smart home, building automation, and industrial wireless sensor applications.
FAQ
What is the maximum operating frequency of the K32L2B31VMP0A?
The K32L2B31VMP0A operates at a maximum core frequency of 72 MHz using its high-accuracy internal RC oscillator (48 MHz) or external crystal with PLL multiplication. This frequency is fully supported across all voltage ranges (1.71–3.6 V) and validated in production silicon per NXP's K32L2B31VMP0A datasheet Rev. 2. The K32L2B31VMP0A achieves deterministic real-time response while maintaining ultra-low active-mode current.
Does the K32L2B31VMP0A include a hardware true random number generator (TRNG)?
Yes, the K32L2B31VMP0A integrates a hardware TRNG compliant with NIST SP 800-90B entropy standards. It delivers cryptographically secure random bits at up to 1.5 Mbps and is accessible via the MCU's RNG peripheral driver in MCUXpresso SDK. The TRNG is used by the K32L2B31VMP0A's security stack for key generation in AES and SHA operations, eliminating reliance on software PRNGs.
What low-power modes does the K32L2B31VMP0A support, and what is the lowest current draw?
The K32L2B31VMP0A supports six low-power modes, including VLLS0 (Very-Low-Leakage Stop 0) with current draw of 1.49 µA (typical) while retaining RTC, LP timer, and wake-up pin functionality. Other modes include LLS (2.1 µA), VLPR (120 µA), and multiple stop/run variants. All values are measured at 3.0 V and 25°C per K32L2B31VMP0A datasheet Section 4.3.1.
Is USB Full-Speed functionality available on the K32L2B31VMP0A, and does it require an external PHY?
Yes, the K32L2B31VMP0A includes a fully integrated USB 2.0 Full-Speed controller with on-die voltage regulator, supporting device-mode operation without external PHY or LDO. The USB_DP/USB_DM pins connect directly to the USB connector, and the internal regulator supplies 3.3 V to the PHY. This capability is confirmed in the K32L2B31VMP0A reference manual and validated in NXP's FRDM-K32L2B development board design.
What package type and pin count does the K32L2B31VMP0A use?
The K32L2B31VMP0A uses a 64-pin QFN package (MP suffix), measuring 9 × 9 mm with 0.5 mm pitch and an exposed thermal pad. This package is RoHS-compliant and optimized for reflow assembly in high-volume industrial PCBs. Pinout compatibility is confirmed across all K32L2Bx1Vxx0A variants in the same package option per NXP's K32L2B31VMP0A datasheet Table 2.
K32L2B31VMP0A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-LFBGA
- Series:
- K32 L2
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- FlexIO, I2C, SPI, TSI, UART/USART, USB
- Peripherals:
- DMA, LCD, PWM, WDT
- Number of I/O:
- -
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.2V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
K32L2B31VMP0A FAQ
1.How can I place an order for K32L2B31VMP0A through Aetrix?
Please submit a Request for Quotation (RFQ) for K32L2B31VMP0A 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 K32L2B31VMP0A reliable?
The price and inventory of K32L2B31VMP0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for K32L2B31VMP0A is usually 5 days.
3.What payment methods are accepted for K32L2B31VMP0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for K32L2B31VMP0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for K32L2B31VMP0A?
K32L2B31VMP0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your K32L2B31VMP0A 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 K32L2B31VMP0A?
For technical support, including K32L2B31VMP0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your K32L2B31VMP0A requirements.
6.How does Aetrix verify that K32L2B31VMP0A is sourced from the original manufacturer or authorized distributors?
All K32L2B31VMP0A 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 K32L2B31VMP0A meets industry standards.
7.What is the process for return or replacement of K32L2B31VMP0A?
All K32L2B31VMP0A units undergo pre-shipment inspection (PSI). If there is an issue with K32L2B31VMP0A, 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 K32L2B31VMP0A part is unused and in its original packaging.
Return procedure for K32L2B31VMP0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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