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STMicroelectronics STM32L462CEU6TR
- Part No.:
- STM32L462CEU6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32L462CEU6TR.pdf
- Description:
- IC MCU 32BIT 512KB FLSH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,584
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Product details
Overview
STM32L462CEU6TR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, delivering 100 DMIPS at 80 MHz, featuring 512 KB Flash, 160 KB SRAM, and integrated analog peripherals including 12-bit ADC (5 Msps), dual 12-bit DAC, op-amp with PGA, and hardware AES encryption. It targets battery-powered IoT sensor nodes, portable medical devices, and energy-harvesting edge controllers requiring sub-µA standby operation and rich mixed-signal capability.
For engineers reviewing the STM32L462CEU6TR datasheet, STM32L462CEU6TR pinout, STM32L462CEU6TR application, or STM32L462CEU6TR equivalent, key selection criteria include verified 2.05 µA Stop 2 mode current, 375 nA Standby-with-RTC power, 83 GPIOs (most 5 V-tolerant), USB 2.0 full-speed crystal-less support, and LQFP48 package compatibility for space-constrained designs.
Technical Context
This MCU implements FlexPowerControl architecture with five low-power modes-Shutdown (22 nA), Standby (106 nA), Standby+RTC (375 nA), Stop 2 (2.05 µA), and Run (84 µA/MHz)-enabled by a multi-rail voltage regulator and adaptive real-time accelerator (ART) for zero-wait-state Flash execution. Its clock system integrates dual PLLs, four internal oscillators (HSI16, MSI, LSI, HSI48), and external crystal support (4–48 MHz HSE, 32 kHz LSE).
The peripheral interconnect matrix enables concurrent high-bandwidth data movement across 14-channel DMA, while independent analog supply domains isolate ADC/DAC/OPAMP/COMP circuits from digital noise. The device supports batch acquisition mode (BAM) for sensor fusion and includes true random number generation, CRC unit, and 96-bit unique ID for secure firmware deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP and floating-point control loops without external coprocessor |
| Memory | 512 KB Flash (single-bank, code readout protection), 160 KB SRAM (32 KB with parity) - supports secure firmware storage and robust runtime data integrity |
| Low-Power Performance | 2.05 µA in Stop 2 mode, 375 nA in Standby with RTC - extends coin-cell battery life to >10 years in periodic wake-up sensing applications |
| Analog Peripherals | 1× 12-bit ADC @ 5 Msps (200 µA/Msps), 2× 12-bit DAC, 1× OPAMP with PGA, 2× comparators - enables precision sensor signal conditioning and closed-loop analog output control |
| Communication | USB 2.0 FS crystal-less, 4× I²C FM+, 3× USART, 1× LPUART, 3× SPI, SAI, CAN 2.0B, SDMMC - supports simultaneous wired connectivity, audio streaming, and industrial bus interfacing |
| Security & ID | AES-128/256 hardware accelerator, 96-bit unique ID, CRC calculation unit - accelerates encrypted OTA updates and device authentication without CPU overhead |
| Package | LQFP48 (7×7 mm, 0.5 mm pitch) - standard footprint compatible with automated PCB assembly and thermal management in compact enclosures |
Pinout & Package
LQFP48 package: 48-pin quad flat pack with exposed thermal pad, 7×7 mm body, 0.5 mm lead pitch, ECOPACK2® compliant. Pin 1 marked by dot or bevelled corner; pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.71–3.6 V) | Supplies core, memory, and most digital peripherals; requires local 100 nF decoupling |
| VSS | Digital ground reference | Common return path for digital I/O and logic; must be connected to PCB ground plane |
| VREF+ | Analog reference positive input | Defines ADC/DAC full-scale range; tied to VDD or external precision reference |
| VREF- | Analog reference negative input | Typically connected to VSS; enables differential analog measurements |
| PA0 | General-purpose I/O / ADC1_IN0 / TIM2_CH1 | Multi-function pin supporting analog input, timer capture, or GPIO interrupt wake-up |
| PA13 | SWDIO debug interface | Serial Wire Debug data I/O; essential for programming and real-time debugging |
| PA14 | SWCLK debug interface | Serial Wire Debug clock input; used with PA13 for JTAG/SWD boundary scan |
| PA15 | JTDI / TIM2_CH1 | Optional JTAG test data input or alternate timer channel; configurable via SYSCFG register |
| NRST | Active-low reset input | External reset assertion resets all peripherals and CPU; internal pull-up enabled by default |
| VBAT | Backup power supply | Connects to coin cell to retain RTC calendar and 32×32-bit backup registers during main power loss |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl low-power architecture | Enables 22 nA Shutdown and 375 nA Standby-with-RTC - reduces energy budget for infrequent wake-up sensor nodes |
| Adaptive Real-Time Accelerator (ART) | Zero-wait-state execution from Flash at 80 MHz - eliminates cache misses in deterministic real-time control tasks |
| Independent analog power domain | Separate VDDA/VSSA rails isolate ADC/DAC/OPAMP from digital switching noise - improves SNR in precision measurement |
| Batch Acquisition Mode (BAM) | Allows CPU to sleep while peripherals autonomously acquire and process sensor data - cuts active time by >70% in polling-based systems |
| USB 2.0 full-speed crystal-less | Eliminates external 48 MHz crystal and matching capacitors - reduces BOM cost and PCB area in portable designs |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with Bluetooth LE telemetry and on-device anomaly detection. IC Role / Device Role / Timing Role: Central controller managing analog front-end (ADC + OPAMP), cryptographic signing of health data, and USB/LPUART firmware updates. Use Value: 2.05 µA Stop 2 mode extends CR2032 battery life beyond 2 years; hardware AES ensures HIPAA-compliant data encryption without CPU load. | Use Scenario: Tamper-resistant electricity/water meter with pulse counting, LCD display, and NB-IoT backhaul via UART/SAI. IC Role / Device Role / Timing Role: Primary SoC handling metrology calculations, RTC-based billing intervals, and secure firmware validation before OTA update execution. Use Value: 375 nA Standby-with-RTC enables decade-long operation on supercapacitor backup; CAN 2.0B supports legacy AMI infrastructure integration. |
| Industrial Wireless Sensor Node | Energy-Harvesting Remote Controller |
Use Scenario: LoRaWAN-enabled temperature/humidity/vibration node powered by solar cell + supercapacitor. IC Role / Device Role / Timing Role: Low-power host managing TSC capacitive touch, SDMMC logging, and LPUART wake-up from deep sleep on event trigger. Use Value: 145 nA VBAT mode preserves RTC and backup registers during extended solar dormancy; 83 GPIOs support multi-sensor expansion headers. | Use Scenario: Self-powered HVAC remote using piezoelectric switch harvesting and BLE broadcast to gateway. IC Role / Device Role / Timing Role: Ultra-low-power state machine executing button debouncing, IR modulation (IRTIM), and AES-encrypted command packet generation. Use Value: 22 nA Shutdown mode minimizes leakage during ambient energy harvesting gaps; hardware RNG prevents replay attacks on wireless commands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power Cortex-M4 MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L476RGV6 | Higher Flash (1 MB) and SRAM (128 KB), adds Chrom-ART accelerator and TFT-LCD controller | Better suited for GUI-driven HMI applications; lacks LQFP48 package option | Select when display interface or larger firmware image size is required; not drop-in due to pin count (64 vs 48) and package mismatch |
| STM32L432KCU6 | Smaller memory (256 KB Flash, 64 KB SRAM), no SAI or SDMMC, only 25 GPIOs, UFBGA32 package | Targeted at minimal-footprint cost-sensitive sensors; missing CAN, USB, and advanced analog features | Choose for sub-$2 BOM-critical designs where USB/CAN/audio are unnecessary; incompatible pinout and reduced peripheral set |
Compared with STM32L462CEU6TR, STM32L476RGV6 offers greater memory and display capability but requires redesign for 64-pin layout, while STM32L432KCU6 sacrifices connectivity and analog richness to achieve lower cost and size-making the CEU6TR optimal for balanced ultra-low-power embedded control with full peripheral integration in LQFP48.
Availability
STM32L462CEU6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and energy-harvesting remote controllers requiring stable component supply across multi-year production cycles.
Supply support for STM32L462CEU6TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade components with focus on energy efficiency and system-level integration.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance per microwatt, combining Cortex-M4 processing with advanced analog, security, and connectivity features for battery-operated and energy-constrained systems.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L462CEU6TR operates up to 80 MHz with ART Accelerator enabled. At this frequency, typical Run mode current is 84 µA/MHz (6.72 mA total) with code executing from Flash and prefetch disabled. This value assumes VDD = 3.3 V, TA = 25 °C, and all peripherals disabled except core and memory subsystems.
Does STM32L462CEU6TR support hardware encryption for secure boot?
Yes-it integrates a dedicated AES-128/256 hardware accelerator and supports secure boot via ROM-based bootloader with public-key verification. The device also provides 96-bit unique ID and CRC unit for firmware image integrity checks, enabling trusted execution environments without external security chips.
Can the internal 32 kHz RC oscillator replace the external LSE crystal for RTC operation?
No-the internal 32 kHz RC (LSI) has ±5% accuracy and is unsuitable for calendar-grade RTC timing. For accurate timekeeping, the external 32.768 kHz crystal (LSE) must be used. However, LSI can serve as backup clock source if LSE fails, with calibration possible via RTC calibration register.
Which development tools are officially supported for STM32L462CEU6TR firmware development?
ST provides full support via STM32CubeIDE (free Eclipse-based IDE), STM32CubeMX (graphical initialization code generator), and STM32CubeL4 firmware package. Hardware debug is enabled through SWD using ST-LINK/V2-1 or compatible probes; no JTAG adapter is required due to SWD-only pin mapping on LQFP48.
STM32L462CEU6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- Series:
- STM32L4
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, QSPI, SAI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 160K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 10x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L462CEU6TR FAQ
1.How can I place an order for STM32L462CEU6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L462CEU6TR 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 STM32L462CEU6TR reliable?
The price and inventory of STM32L462CEU6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L462CEU6TR is usually 5 days.
3.What payment methods are accepted for STM32L462CEU6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L462CEU6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L462CEU6TR?
STM32L462CEU6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L462CEU6TR 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 STM32L462CEU6TR?
For technical support, including STM32L462CEU6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L462CEU6TR requirements.
6.How does Aetrix verify that STM32L462CEU6TR is sourced from the original manufacturer or authorized distributors?
All STM32L462CEU6TR 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 STM32L462CEU6TR meets industry standards.
7.What is the process for return or replacement of STM32L462CEU6TR?
All STM32L462CEU6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L462CEU6TR, 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 STM32L462CEU6TR part is unused and in its original packaging.
Return procedure for STM32L462CEU6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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