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STMicroelectronics STM32L476RCT6
- Part No.:
- STM32L476RCT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L476RCT6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:9,698
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Product details
Overview
STM32L476RCT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 80 MHz max frequency, 256 KB flash, 64 KB SRAM, USB OTG FS, LCD controller, and integrated SMPS support. It operates from 1.71–3.6 V across –40 °C to 85 °C, delivers 100 DMIPS, and targets battery-powered IoT sensors, portable medical devices, and smart metering systems requiring long runtime and rich peripheral integration.
For engineers reviewing the STM32L476RCT6 datasheet, STM32L476RCT6 pinout, STM32L476RCT6 application, or STM32L476RCT6 equivalent, key selection criteria include its 39 µA/MHz SMPS-enabled run mode, dual 12-bit DACs with sample-and-hold, 3× 12-bit ADCs (5 Msps), 2× operational amplifiers with PGA, and LQFP64 package compatibility for space-constrained industrial control designs.
Technical Context
The device integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a memory protection unit (MPU) and dual-bank flash supporting read-while-write. Its power architecture includes three low-power modes-Stop 2 (1.1 µA), Standby (120 nA), and Shutdown (30 nA)-with five dedicated wakeup pins and hardware calendar RTC.
Peripherals are routed via an interconnect matrix supporting concurrent access; clocking uses four independent sources (HSE, LSE, HSI, MSI) plus three PLLs for system, USB, and audio domains. The analog subsystem features independent supply domains for ADCs, DACs, OPAMPs, and comparators to minimize noise coupling in mixed-signal applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU and DSP instructions, 80 MHz max - enables real-time signal processing and floating-point math without external coprocessor. |
| Flash / SRAM | 256 KB flash (dual-bank, RWW), 64 KB SRAM (32 KB with parity) - supports firmware updates over-the-air and safety-critical data integrity. |
| Power Modes | 30 nA Shutdown, 1.1 µA Stop 2 with RTC - extends battery life in intermittently active sensor nodes beyond 10 years on coin cell. |
| Analog Peripherals | 3× 12-bit ADCs (5 Msps), 2× 12-bit DACs, 2× OPAMPs with PGA, 2× comparators - enables closed-loop analog control and sensor signal conditioning on-chip. |
| Connectivity | USB OTG FS, CAN 2.0B, 5× USART, 3× SPI, 3× I²C, SDMMC, SWPMI - supports wired industrial communication and secure peripheral expansion. |
| Package | LQFP64 (10 × 10 mm, 0.5 mm pitch) - standard surface-mount footprint compatible with automated assembly and thermal management in compact enclosures. |
| Operating Range | 1.71–3.6 V supply, –40 °C to +85 °C - certified for industrial environments including outdoor metering and factory-floor edge nodes. |
Pinout & Package
LQFP64 package: 64-pin quad flat pack with exposed thermal pad, 10 × 10 mm body, 0.5 mm lead pitch, RoHS-compliant ECOPACK2 finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Core & I/O power supply / ground | Dual power domains: VDD powers digital logic and analog peripherals; separate VREF+ and VREF– pins enable precise ADC reference. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/Os | Up to 51 GPIOs (LQFP64 variant); most 5 V-tolerant - simplifies level-shifting with legacy peripherals and sensors. |
| PA11/PA12 | USB D+/D– | Dedicated full-speed USB OTG interface with internal transceivers - eliminates external PHY for cost-sensitive embedded hosts. |
| PF0–PF15 | Alternate function I/O | Supports LCD segment/common, DFSDM, SAI, and LPUART - enables low-power display and sigma-delta sensor interfaces without external controllers. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–5.5 V logic - ensures robust recovery from brown-out or ESD events. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables dynamic voltage scaling and multi-threshold low-power modes - reduces average current by >70% vs. fixed-voltage MCUs in duty-cycled applications. |
| ART Accelerator™ | Zero-wait-state flash execution at 80 MHz - eliminates instruction cache misses and guarantees deterministic interrupt latency <12 cycles. |
| Integrated SMPS support | External DC-DC converter interface (VDD12) - achieves 39 µA/MHz run mode vs. 100 µA/MHz with LDO, cutting power by 61% in continuous operation. |
| Hardware LCD controller | Drives 4×44 or 8×40 segments with integrated step-up converter - removes external display driver IC and reduces BOM count in portable HMI designs. |
| Capacitive touch sensing (TSC) | 24-channel hardware-accelerated touch engine - supports up to 12 touchkeys or rotary sliders with <5 µA active current and no CPU overhead. |
Applications
| Smart Energy Metering | Portable Medical Device |
|---|---|
Use Scenario: Electricity/water/gas meter with tamper detection, pulse counting, and wireless reporting. IC Role / Device Role / Timing Role: Main application processor managing metrology ADC sampling, RTC-based billing intervals, and LoRaWAN/Bluetooth LE stack timing. Use Value: 30 nA shutdown current extends 10-year battery life; integrated LCD driver eliminates external display controller; CAN interface enables legacy utility network integration. | Use Scenario: Handheld blood glucose monitor or ECG patch with OLED display and Bluetooth connectivity. IC Role / Device Role / Timing Role: System-on-chip handling analog front-end signal acquisition, real-time waveform analysis, and secure BLE pairing. Use Value: Dual 12-bit DACs generate precise calibration references; 2× OPAMPs with PGA condition weak biosensor signals; LPUART wakes CPU from Stop 2 on button press. |
| Industrial Sensor Node | Smart Building Controller |
Use Scenario: Wireless temperature/humidity/CO₂ node deployed in HVAC ducts or factory floors. IC Role / Device Role / Timing Role: Data concentrator acquiring from multiple I²C/SPI sensors, performing local FFT analysis, and transmitting via sub-GHz RF. Use Value: 3× 12-bit ADCs sample 16 channels simultaneously at 5 Msps; batch acquisition mode (BAM) reduces CPU load by 40%; 5 V-tolerant GPIOs interface directly with legacy 5 V sensors. | Use Scenario: DIN-rail mounted lighting or HVAC controller with touch interface and RS-485 fieldbus. IC Role / Device Role / Timing Role: Central controller running Modbus RTU over USART, driving capacitive touch panel, and managing relay outputs. Use Value: 24-channel TSC enables full QWERTY keypad on PCB; CAN and RS-485 physical layers supported via USART+transceiver; 128 KB SRAM buffers Modbus transaction history. |
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 | 48 MHz max, 256 KB flash, 64 KB SRAM, no LCD, no SMPS support, 48-pin WLCSP/UFBGA | Targeted at size-constrained, non-display applications like wearables or security tokens | Select when display, high-speed ADC, or external DC-DC integration is unnecessary and board area is critical. |
| STM32L552RET6 | 110 MHz Cortex-M33, TrustZone, 512 KB flash, 256 KB SRAM, same LQFP64 package, higher active current (62 µA/MHz) | Designed for secure boot, encrypted firmware updates, and PSA Level 2 certification requirements | Select when hardware root-of-trust, cryptographic acceleration, or secure OTA updates are mandatory. |
Compared with STM32L432KCU6, the STM32L476RCT6 adds LCD, SMPS, and richer analog peripherals at the cost of larger footprint; versus STM32L552RET6, it trades security extensions and higher performance for lower power and proven industrial qualification.
Availability
STM32L476RCT6 is available at Aetrix Electronics and suitable for smart metering, portable diagnostics, industrial sensor nodes, and building automation systems requiring stable component supply across multi-year production cycles.
Supply support for STM32L476RCT6 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 management ICs, sensors, and automotive semiconductors since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and industrial-grade reliability - optimized for metering, healthcare, and IoT edge nodes where energy efficiency and peripheral density are critical.
FAQ
What is the maximum operating frequency and core type of the STM32L476RCT6?
The STM32L476RCT6 features an Arm Cortex-M4 core with FPU, rated for up to 80 MHz operation. It achieves 100 DMIPS and includes DSP instructions and a Memory Protection Unit (MPU). The ART Accelerator™ enables zero-wait-state execution from flash memory, ensuring deterministic real-time performance without external cache.
Does the STM32L476RCT6 support external DC-DC converters, and how does it affect power consumption?
Yes, the STM32L476RCT6 supports external switched-mode power supply (SMPS) via the VDD12 pin. When powered by an external SMPS instead of the internal LDO, active current drops from 100 µA/MHz to 39 µA/MHz at 3.3 V - a 61% reduction. This configuration requires proper decoupling and sequencing per Section 6.3.6 of DS10198 Rev 11.
Which package and pin count does the STM32L476RCT6 use, and what are its thermal characteristics?
The STM32L476RCT6 uses the LQFP64 package: 64-pin, 10 × 10 mm body, 0.5 mm pitch, with exposed thermal pad. Its θJA is 46 °C/W (JEDEC Std 51-7), and maximum junction temperature is 125 °C. Thermal performance is validated per JESD51-2A, and the ECOPACK2-compliant finish meets RoHS and halogen-free requirements.
Can the STM32L476RCT6 drive an LCD panel directly, and what are the display capabilities?
Yes, the STM32L476RCT6 integrates a hardware LCD controller supporting up to 8×40 or 4×44 segments with built-in step-up converter. It drives common-electrode and segment-electrode lines directly, eliminating external bias generators. Contrast is adjustable via software-controlled voltage steps, and the controller operates in Stop mode to maintain display during low-power states.
STM32L476RCT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, 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:
- 51
- Program Memory Size:
- 256KB (256K 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:
STM32L476RCT6 FAQ
1.How can I place an order for STM32L476RCT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L476RCT6 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 STM32L476RCT6 reliable?
The price and inventory of STM32L476RCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L476RCT6 is usually 5 days.
3.What payment methods are accepted for STM32L476RCT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L476RCT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L476RCT6?
STM32L476RCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L476RCT6 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 STM32L476RCT6?
For technical support, including STM32L476RCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L476RCT6 requirements.
6.How does Aetrix verify that STM32L476RCT6 is sourced from the original manufacturer or authorized distributors?
All STM32L476RCT6 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 STM32L476RCT6 meets industry standards.
7.What is the process for return or replacement of STM32L476RCT6?
All STM32L476RCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L476RCT6, 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 STM32L476RCT6 part is unused and in its original packaging.
Return procedure for STM32L476RCT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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