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STMicroelectronics STM32L476VET6TR
- Part No.:
- STM32L476VET6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32L476VET6TR.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,336
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Product details
Overview
STM32L476VET6TR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 512 KB flash, 128 KB SRAM, USB OTG FS, LCD controller, and integrated SMPS support. It delivers 39 µA/MHz run current in SMPS mode and supports -40 °C to 85 °C operation - deployed in battery-powered medical sensors and portable industrial HMI displays.
For engineers reviewing the STM32L476VET6TR datasheet, STM32L476VET6TR pinout, STM32L476VET6TR application, or STM32L476VET6TR equivalent, key selection criteria include its dual-voltage I/O capability (1.08 V–3.6 V), 114 fast I/Os (most 5 V-tolerant), low-power timer availability in Stop 2 mode, and hardware-based capacitive touch sensing for robust user interface design.
Technical Context
This MCU integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 80 MHz, alongside three independent PLLs for system, USB, and audio clock domains. Its FlexPowerControl architecture supports seven low-power modes, including Shutdown (30 nA), Standby with RTC (420 nA), and Stop 2 (1.1 µA), all with sub-4 µs wakeup latency.
The device features a full interconnect matrix for concurrent peripheral access, independent analog supply domains (VDDA/VSSA), and hardware parity on 32 KB of SRAM. It includes two 12-bit DACs, three 12-bit ADCs (5 Msps), two op-amps with PGA, and two ultra-low-power comparators - all configurable without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 80 MHz max frequency, 100 DMIPS performance - enables real-time signal processing and floating-point math in resource-constrained edge nodes. |
| Memory | 512 KB flash (2-bank read-while-write), 128 KB SRAM (32 KB with hardware parity) - supports secure firmware updates and fault-tolerant data buffering. |
| Power Efficiency | 39 µA/MHz in SMPS mode @3.3 V - reduces battery drain in multi-year IoT deployments using external DC-DC conversion. |
| Low-Power Modes | Shutdown: 30 nA; Standby with RTC: 420 nA; Stop 2: 1.1 µA - enables wake-on-event operation for sensor hubs with <1 µA average system current. |
| Analog Peripherals | 3× 12-bit ADCs (5 Msps), 2× 12-bit DACs, 2× op-amps with PGA, 2× comparators - allows simultaneous acquisition, conditioning, and feedback control without external components. |
| Connectivity | USB OTG FS, CAN 2.0B, 5× USART, 3× SPI, 3× I²C, LPUART, SAI, SDMMC - supports mixed wired/wireless gateway architectures with legacy bus compatibility. |
| Package & I/O | LQFP100 (14 × 14 mm), 82 GPIOs (5 V-tolerant), 14 I/Os with independent 1.08–3.6 V supply - simplifies mixed-voltage board design and eases migration from legacy microcontrollers. |
Pinout & Package
LQFP100 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2, with exposed thermal pad for enhanced thermal dissipation in compact industrial enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Core logic supply (1.71–3.6 V); decoupling required per datasheet layout guidelines to maintain low-noise operation in mixed-signal environments. |
| VDDA, VSSA | Analog power and ground | Independent 1.62–3.6 V analog domain - isolates ADC/DAC/OPAMP noise from digital switching transients. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | 82 total GPIOs; most 5 V-tolerant; up to 14 support independent VDDIO2 (1.08–3.6 V) - enables direct interfacing with legacy 5 V peripherals or low-voltage sensors. |
| PC13–PC15 | RTC oscillator pins | Support 32.768 kHz crystal for hardware calendar and alarm functions - maintains timekeeping during VBAT backup with <1 µA consumption. |
| PA9/PA10 | USB OTG FS D+/D− | Dedicated full-speed USB transceiver pins - requires internal PHY and 1.5 kΩ pull-up on D+ for device enumeration without external components. |
| PD14/PD15 | LCD segment drivers | Drive up to 4×44 or 8×40 LCD segments with integrated step-up converter - eliminates need for external LCD bias supply in portable displays. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Seven low-power modes with validated current specs (e.g., 30 nA Shutdown, 420 nA Standby+RTC) - enables precise energy budgeting for battery lifetime prediction in certified medical devices. |
| ART Accelerator™ | Zero-wait-state execution from flash at 80 MHz - eliminates cache misses in deterministic control loops for motor drive and closed-loop sensing applications. |
| Capacitive touch sensing (TSC) | 24-channel hardware-accelerated touch controller supporting touchkey, linear, and rotary sensors - reduces firmware overhead and improves ESD immunity vs. software-based solutions. |
| Integrated SMPS support | Dedicated VDD12 pin and control logic for external DC-DC converter - achieves 39 µA/MHz run efficiency, cutting power by >60% vs. LDO-only operation at 3.3 V. |
| Hardware crypto & security | True random number generator (RNG), CRC unit, 96-bit unique ID, and firewall protection - satisfies basic requirements for secure boot and firmware authentication in industrial gateways. |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with Bluetooth LE telemetry and OLED display. IC Role / Device Role / Timing Role: Central controller managing analog front-end sampling, LCD refresh, USB charging negotiation, and low-power radio scheduling. Use Value: Sub-µA Stop 2 mode with LPUART wakeup and 4 µs resume enables >30-day battery life while maintaining real-time responsiveness to physiological events. | Use Scenario: Tamper-resistant electricity meter with metrology IC interface, IR/RF communication, and LCD billing display. IC Role / Device Role / Timing Role: Secure host processor handling pulse counting, tariff switching, cryptographic signing, and LCD driver timing synchronization. Use Value: Hardware parity on critical SRAM and firewall isolation prevent memory corruption during voltage dips - meeting IEC 62056-21 and EN 13757-3 compliance requirements. |
| Industrial HMI Panel | Wireless Sensor Node Gateway |
Use Scenario: Local touchscreen interface for PLC control with real-time status visualization and local data logging. IC Role / Device Role / Timing Role: Graphics-capable MCU driving 4×44 segment LCD via integrated step-up converter and managing RS-485 Modbus RTU communication. Use Value: Integrated LCD controller eliminates external display driver IC, reducing BOM cost and PCB area while supporting wide-temp (-40 °C to 85 °C) operation in factory environments. | Use Scenario: LoRaWAN edge node aggregating temperature, humidity, and vibration data from multiple analog/digital sensors. IC Role / Device Role / Timing Role: Multi-protocol concentrator with simultaneous ADC oversampling, DFSDM sigma-delta filtering, and LoRa modulation timing control. Use Value: Dual 12-bit DACs and 2× op-amps enable calibrated analog output for legacy 4–20 mA field instruments - extending interoperability without external signal conditioners. |
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 |
|---|---|---|---|
| STM32L432KCU6 | 32 KB flash, 12 KB SRAM, no LCD, no SMPS support, QFN32 package | Targeted at cost-sensitive, space-constrained sensor nodes without display or high-memory firmware | Select when BOM cost and footprint are primary constraints and LCD/SMPS are unnecessary. |
| STM32L552RET6 | ARMv8-M TrustZone®, 512 KB flash, 256 KB SRAM, 110 µA/MHz run, no LCD controller | Designed for secure firmware execution in connected industrial assets requiring PSA Level 2 certification | Choose when hardware-enforced security isolation and cryptographic acceleration outweigh LCD functionality. |
Compared with STM32L432KCU6, the STM32L476VET6TR provides 16× more flash and integrated LCD/SMPS - justifying its use in feature-rich HMIs; versus STM32L552RET6, it trades TrustZone for lower active power and display integration - making it optimal for battery-powered UIs where security is handled at the cloud layer.
Availability
STM32L476VET6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial HMI panels, and wireless sensor node gateways requiring stable component supply across multi-year production cycles.
Supply support for STM32L476VET6TR 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, specializing in microcontrollers, power management, and MEMS sensors for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and real-time performance - designed specifically for portable medical devices, smart meters, and energy-harvesting IoT endpoints.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating?
The STM32L476VET6TR operates at up to 80 MHz with an ART Accelerator-enabled core delivering 100 DMIPS (1.25 DMIPS/MHz). This performance level is sustained across the full temperature range (-40 °C to +85 °C) and supply voltage (1.71–3.6 V), verified per DS10198 Rev 11 Section 3.1.
Does this MCU support external memory expansion?
Yes - it includes a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, and NAND memories, plus a Quad SPI interface for high-speed serial flash. The FSMC implements 8-/16-bit data buses with programmable timing, validated for 100 MHz operation in asynchronous mode per Section 3.35 of the datasheet.
How many I/O pins support independent voltage supply, and what is the range?
Fourteen I/Os (grouped as VDDIO2 domain) support independent supply from 1.08 V to 3.6 V, enabling direct interface with low-voltage sensors or legacy 1.8 V logic without level shifters. Pin mapping is fixed per LQFP100 package and documented in Table 16 of DS10198 Rev 11.
What LCD configurations does the integrated controller support?
The LCD controller supports either 8×40 or 4×44 segment configurations with integrated step-up converter, eliminating external bias generation. It drives common-electrode and segment-electrode outputs directly, with hardware support for blinking, contrast control, and static/dynamic multiplexing - detailed in Section 3.21 of the datasheet.
STM32L476VET6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-LQFP
- 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, EBI/EMI, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, USB OTG
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, PWM, WDT
- Number of I/O:
- 85
- 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:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L476VET6TR FAQ
1.How can I place an order for STM32L476VET6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L476VET6TR 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 STM32L476VET6TR reliable?
The price and inventory of STM32L476VET6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L476VET6TR is usually 5 days.
3.What payment methods are accepted for STM32L476VET6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L476VET6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L476VET6TR?
STM32L476VET6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L476VET6TR 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 STM32L476VET6TR?
For technical support, including STM32L476VET6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L476VET6TR requirements.
6.How does Aetrix verify that STM32L476VET6TR is sourced from the original manufacturer or authorized distributors?
All STM32L476VET6TR 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 STM32L476VET6TR meets industry standards.
7.What is the process for return or replacement of STM32L476VET6TR?
All STM32L476VET6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L476VET6TR, 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 STM32L476VET6TR part is unused and in its original packaging.
Return procedure for STM32L476VET6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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