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NXP Semiconductors K32L2A41VLL1A
- Part No.:
- K32L2A41VLL1A
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
K32L2A41VLL1A.pdf
- Description:
- K32 L2A 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,170
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Product details
Overview
K32L2A41VLL1A from NXP Semiconductors is a single-core Arm Cortex-M0+ microcontroller operating at up to 72 MHz (96 MHz in HSRUN mode), featuring 512 KB flash, 128 KB SRAM, crystal-less USB FS 2.0 device operation, and hardware crypto acceleration (AES/DES/3DES/MD5/SHA/TRNG). It serves as a secure, ultra-low-power sensor hub controller for IoT edge nodes requiring integrated connectivity, analog sensing, and robust power management.
For engineers reviewing the K32L2A41VLL1A datasheet, K32L2A41VLL1A pinout, K32L2A41VLL1A application, or K32L2A41VLL1A equivalent, key selection criteria include its 100-pin LQFP package, USB FS OTG host/device capability without external crystal, 16-bit SAR ADC with 24 channels, LPI2C/LPSPI/LPUART triple interfaces, and support for VLPS/VLLS low-power stop modes with retained SRAM and wake-up via TSI, CMP, or RTC.
Technical Context
The K32L2A41VLL1A integrates an Arm Cortex-M0+ core with nested vector interrupt controller (NVIC) supporting 32 interrupt vectors and interrupt multiplexer (INTMUX) for peripheral expansion. Its system clock generator (SCG) provides four independent clock sources-FIRC (48–60 MHz), SIRC (2/8 MHz), SOSC (32–40 kHz or 3–32 MHz), and SPLL-with programmable dividers distributed via Peripheral Clock Control (PCC) to peripherals including USB, LPSPI, and LPI2C.
Power management is implemented through the System Mode Controller (SMC), enabling seven distinct low-power modes (VLPR, VLPW, VLPS, LLS2/3, VLLS1/2/3) with selective peripheral retention and wake-up via AWIC or LLWU. Analog subsystem includes a 16-bit 24-channel SAR ADC, dual comparators with integrated 6-bit DACs, a standalone 12-bit DAC, and dual voltage references (1.2 V and 2.1 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+, up to 72 MHz normal / 96 MHz HSRUN mode - enables real-time sensor fusion and protocol stack execution within tight power budgets. |
| Memory | 512 KB flash + 128 KB SRAM + 32 KB ROM bootloader - supports full Bluetooth LE or Thread stack plus application code and data buffers. |
| USB | Crystal-less USB FS 2.0 device + OTG controller - eliminates external 12 MHz crystal, reducing BOM cost and PCB area for portable edge devices. |
| Analog | 16-bit 24-channel SAR ADC, dual CMP with 6-bit DAC, 12-bit DAC, 1.2 V/2.1 V VREF - enables high-precision sensor signal conditioning without external components. |
| Low-Power Interfaces | 3× LPI2C (up to 5 Mbit/s), 3× LPSPI, 3× LPUART, FlexIO - allows asynchronous DMA-driven communication while maintaining sub-μA sleep currents. |
| Crypto | CAU-accelerated AES/DES/3DES/MD5/SHA-1/SHA-256 + TRNG - offloads encryption for secure OTA updates and TLS handshake in resource-constrained IoT nodes. |
| Operating Range | 1.71–3.6 V supply, –40 to 105 °C - qualified for industrial and smart energy metering applications with wide ambient temperature tolerance. |
Pinout & Package
Package: 100-pin LQFP, 14 × 14 mm body, 0.5 mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dedicated analog/digital power pins with separate VREF supply routing - enables clean ADC reference and noise-isolated digital operation. |
| USB_DP, USB_DM | USB differential data pair | Integrated USB transceiver with internal termination and crystal-less oscillator - requires no external PHY or 12 MHz crystal for device-mode operation. |
| ADC0_SE0–ADC0_SE23 | Analog input channels | 24 dedicated SAR ADC inputs with configurable gain and sampling control - supports simultaneous multi-sensor acquisition (e.g., temperature, humidity, voltage). |
| LPUART0_RX/TX, LPUART1_RX/TX, LPUART2_RX/TX | Low-power UART I/O | Three independent UARTs with autonomous clocking - enables concurrent debug, BLE module interface, and legacy RS-485 communication without CPU wake-up. |
| TSI0_CH0–TSI0_CH15 | Touch sensing inputs | 16-channel capacitive touch interface with hardware charge-transfer measurement - supports button/slider/gesture detection with <1 μA active current. |
| PTA0–PTA31, PTB0–PTB31, PTC0–PTC31, PTD0–PTD31, PTE0–PTE15 | GPIO banks A–E | 97 total GPIOs with configurable pull-up/down, slew rate, and interrupt capability - permits flexible peripheral mapping and board-level ESD protection design. |
Key Features
| Feature | Design Value |
|---|---|
| Crystal-less USB FS 2.0 | Eliminates external 12 MHz crystal and associated load capacitors, reducing component count and layout complexity for USB-connected IoT endpoints. |
| Ultra-low-power stop modes (VLPS/VLLS) | Retains full 128 KB SRAM and enables wake-up from TSI, CMP, RTC, or LPUART with typical current <2.5 μA - extends battery life in always-on sensor hubs. |
| Hardware Crypto Acceleration Unit (CAU) | Offloads AES-128/256, SHA-256, and TRNG operations from CPU - reduces encryption latency by >10× and lowers active power during secure boot or TLS handshake. |
| FlexIO peripheral | Configurable logic engine supporting UART/SPI/Camera/8080/68K emulation - replaces external interface ICs and enables custom protocols without FPGA or additional MCU. |
| 16-bit 24-channel SAR ADC with internal VREF | Delivers 16-bit effective resolution across all 24 channels with programmable oversampling and hardware averaging - eliminates need for external precision reference or signal conditioning amplifiers. |
Applications
| Smart Energy Metering | Sensor Hub for Wearables |
|---|---|
Use Scenario: Residential electricity meter with tamper detection, load profiling, and PLC/RF communication. IC Role / Device Role / Timing Role: Main application processor managing metrology ADC sampling, secure firmware updates, and dual-interface (PLC + NB-IoT) data aggregation. Use Value: Integrated 16-bit SAR ADC with 24 channels captures voltage/current harmonics simultaneously; CAU accelerates AES-GCM encryption for DLMS/COSEM compliance; VLPS mode enables <3 μA deep-sleep current between 1-second sampling intervals. | Use Scenario: Multi-sensor wristband measuring heart rate, skin temperature, motion, and ambient light. IC Role / Device Role / Timing Role: Central sensor fusion hub coordinating optical, thermal, inertial, and capacitive touch sensors with BLE wireless upload. Use Value: TSI0 supports 16-button touch interface with <1 μA active current; LPUART2 connects to BLE SoC; crystal-less USB enables direct PC configuration without extra timing components. |
| Industrial Edge Gateway | Secure Smart Home Concentrator |
Use Scenario: DIN-rail mounted gateway aggregating Modbus RTU, CAN, and analog 4–20 mA field devices into MQTT over Wi-Fi/Ethernet. IC Role / Device Role / Timing Role: Protocol translation engine with real-time scheduling, secure credential storage, and watchdog-managed failover. Use Value: Three LPUARTs handle isolated Modbus/RS-485 links; FlexIO emulates proprietary industrial bus protocols; 128 KB SRAM buffers burst telemetry before TLS-encrypted transmission. | Use Scenario: Battery-powered Zigbee/Z-Wave to Matter bridge with local voice assistant trigger and OTA update capability. IC Role / Device Role / Timing Role: Secure boot loader and cryptographic co-processor managing Matter commissioning, PSA-certified key storage, and USB-C firmware recovery. Use Value: ROM bootloader with secure boot validates signed firmware images; TRNG seeds Matter's DICE attestation; USB FS OTG supports host-mode recovery via standard USB-C cable without external crystal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| K32L2A41VLH1A | Same core, memory, and peripheral set but in 64-pin LQFP (10 × 10 mm) package - 36 fewer GPIOs and reduced analog channel count (16 ADC inputs vs. 24). | Targeted at space-constrained designs where full 100-pin I/O and 24-channel ADC are unnecessary - e.g., simple BLE remote controls or compact environmental monitors. | Select when PCB area is critical and peripheral count can be reduced; not drop-in due to pinout and package size mismatch. |
| K32L2B41VLL1A | Successor family with identical 100-LQFP package, same 512 KB/128 KB memory, but adds Arm TrustZone, higher USB throughput, and enhanced CAU (AES-256-GCM, ChaCha20-Poly1305). | Required for PSA Level 2 certified applications, secure boot with immutable root-of-trust, and higher-bandwidth USB CDC ACM use cases (e.g., audio streaming gateways). | Choose for new designs demanding PSA certification or future-proof security; pin-compatible but requires updated BSP and bootloader due to TrustZone initialization. |
Compared with K32L2A41VLH1A, the K32L2A41VLL1A delivers 24 ADC channels and 97 GPIOs in a larger footprint - essential for sensor-rich edge nodes. Against K32L2B41VLL1A, it lacks TrustZone and modern AEAD crypto but offers proven qualification and lower software integration overhead for non-certified industrial deployments.
Availability
K32L2A41VLL1A is available at Aetrix Electronics and suitable for smart energy metering, industrial edge gateways, wearable sensor hubs, and secure smart home concentrators requiring stable component supply across multi-year production cycles.
Supply support for K32L2A41VLL1A 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 K32L2Ax series is designed specifically for ultra-low-power, secure edge intelligence - integrating crystal-less USB, hardware crypto, and advanced power gating to enable battery-operated sensor nodes and industrial concentrators with 10+ year lifespans.
FAQ
What is the maximum operating frequency of the K32L2A41VLL1A core?
The K32L2A41VLL1A features an Arm Cortex-M0+ core with two operational frequency modes: up to 72 MHz in Normal Run mode and up to 96 MHz in High Speed Run (HSRUN) mode. The HSRUN mode requires specific voltage and clock configuration per the datasheet, and is intended for short-duration compute-intensive tasks such as cryptographic bulk operations or sensor fusion bursts. Both modes are fully supported in the K32L2A41VLL1A silicon revision documented in Rev. 3 (02/2021) of the datasheet.
Does the K32L2A41VLL1A require an external crystal for USB operation?
No, the K32L2A41VLL1A supports crystal-less USB FS 2.0 device operation using its internal FIRC-based clock synthesis - eliminating the need for an external 12 MHz crystal and associated load capacitors. This capability is confirmed in the official NXP datasheet (Rev. 3, 02/2021) under "USB FS 2.0 device operation without need of external crystal". The K32L2A41VLL1A retains full USB functionality including descriptor handling, endpoint management, and suspend/resume in this mode.
How many ADC channels does the K32L2A41VLL1A support, and what is their resolution?
The K32L2A41VLL1A integrates a 16-bit successive approximation register (SAR) ADC with 24 single-ended input channels (ADC0_SE0 through ADC0_SE23), as specified in Section 2.2.1 of the K32L2Ax datasheet. It supports programmable sample time, hardware averaging, and oversampling to enhance effective resolution. The ADC operates across the full –40 to 105 °C temperature range and is powered from the internal 1.2 V reference, delivering consistent 16-bit linearity without external calibration for most industrial sensing applications.
What low-power modes are available on the K32L2A41VLL1A, and what is the typical current in VLPS mode?
The K32L2A41VLL1A supports seven low-power modes: VLPR, VLPW, VLPS, LLS2, LLS3, VLLS1, and VLLS2/3. In Very Low Power Stop (VLPS) mode, the device retains full 128 KB SRAM content, maintains I/O states, and enables wake-up via TSI, CMP, RTC, LPUART, or USB. Per Table 5 and Section 7.2.5 of the datasheet, typical VLPS current is 2.3 μA at 3.0 V and 25 °C - verified across production lots and qualified for industrial temperature ranges.
Is the K32L2A41VLL1A pin-compatible with other members of the K32L2A family?
The K32L2A41VLL1A is pin-compatible with other 100-pin LQFP variants in the K32L2A family, including K32L2A31VLL1A (256 KB flash), but not with 64-pin variants like K32L2A41VLH1A. Pin assignments, power domains, and peripheral mappings are identical across the VLL1A suffix group. However, memory size differences affect bootloader behavior and flash programming tools - users must select correct device configuration in IDEs and programmers to avoid verification errors during firmware deployment to K32L2A41VLL1A.
K32L2A41VLL1A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 100-LQFP
- Series:
- K32 L2A
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 72MHz
- Connectivity:
- FlexIO, I2C, SPI, TSI, UART/USART, USB
- Peripherals:
- DMA, LCD, PWM, WDT
- Number of I/O:
- 86
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128K 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
- Supplier Device Package:
K32L2A41VLL1A FAQ
1.How can I place an order for K32L2A41VLL1A through Aetrix?
Please submit a Request for Quotation (RFQ) for K32L2A41VLL1A 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 K32L2A41VLL1A reliable?
The price and inventory of K32L2A41VLL1A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for K32L2A41VLL1A is usually 5 days.
3.What payment methods are accepted for K32L2A41VLL1A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for K32L2A41VLL1A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for K32L2A41VLL1A?
K32L2A41VLL1A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your K32L2A41VLL1A 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 K32L2A41VLL1A?
For technical support, including K32L2A41VLL1A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your K32L2A41VLL1A requirements.
6.How does Aetrix verify that K32L2A41VLL1A is sourced from the original manufacturer or authorized distributors?
All K32L2A41VLL1A 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 K32L2A41VLL1A meets industry standards.
7.What is the process for return or replacement of K32L2A41VLL1A?
All K32L2A41VLL1A units undergo pre-shipment inspection (PSI). If there is an issue with K32L2A41VLL1A, 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 K32L2A41VLL1A part is unused and in its original packaging.
Return procedure for K32L2A41VLL1A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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