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STMicroelectronics STM32L475RCT3
- Part No.:
- STM32L475RCT3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L475RCT3.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:339
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Product details
Overview
STM32L475RCT3 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 256 KB Flash, 64 KB SRAM, USB OTG FS, dual SAI audio interfaces, and CAN 2.0B - deployed in battery-powered industrial sensors and portable medical monitors requiring sub-µA standby operation and analog signal acquisition.
For engineers reviewing the STM32L475RCT3 datasheet, STM32L475RCT3 pinout, STM32L475RCT3 application, or STM32L475RCT3 equivalent, key selection criteria include its 1.1 µA/MHz run-mode efficiency, 420 nA Stop 2 mode with RTC, 3× 12-bit ADCs (5 Msps), dual 12-bit DACs, and LQFP64 package compatibility with space-constrained PCB layouts.
Technical Context
The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, alongside a memory protection unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture supports five low-power modes - including Shutdown (30 nA), Standby (120 nA), and Stop 2 (420 nA with RTC) - managed via hardware-controlled voltage scaling and BOR circuitry.
Clock system includes three PLLs (system, USB, audio), four oscillator sources (HSE, LSE, HSI16, MSI), and auto-trimmed MSI achieving ±0.25% accuracy. Analog subsystem features independent supply domains, 2× operational amplifiers with PGA, 2× ultra-low-power comparators, and 4× digital filters for sigma-delta modulators - enabling simultaneous high-precision sensing and low-noise signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP tasks (e.g., sensor fusion, audio preprocessing) without external co-processor |
| Memory | 256 KB Flash (2-bank RWW), 64 KB SRAM (32 KB with parity) - supports firmware updates over-the-air while executing from second bank |
| Power Modes | Stop 2 mode: 420 nA with RTC active - sustains timekeeping and wake-up events during multi-year battery operation |
| Analog Peripherals | 3× 12-bit ADCs @ 5 Msps, 2× 12-bit DACs, 2× OPAMPs with PGA - allows concurrent temperature/pressure sensing and analog output control in single-chip designs |
| Communication | USB OTG FS, 2× SAI, CAN 2.0B, LPUART, 3× I²C, 5× USART - enables voice-enabled edge nodes with local audio playback and fieldbus connectivity |
| Package | LQFP64 (10 × 10 mm, 0.5 mm pitch) - compatible with standard reflow processes and accessible routing for mixed-signal layout |
| Temperature Range | -40 °C to +105 °C - qualified for industrial automation and automotive cabin applications without derating |
Pinout & Package
LQFP64 package: 64-pin quad flat pack, 10 × 10 mm body, 0.5 mm lead pitch, ECOPACK2® compliant. Pin count and function mapping validated per STMicroelectronics DS10969 Rev 5, Section 4 "Pinouts and pin description".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Main, analog, and I/O power supplies | Independent domains enable noise isolation between digital core, precision analog, and 5V-tolerant GPIOs |
| VSS, VSSA | Digital and analog ground returns | Separate ground pins reduce coupling between high-speed switching and sensitive ADC/DAC paths |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | Up to 51 fast I/Os (most 5V-tolerant); support 16 alternate functions including SAI, CAN, USB, and DFSDM |
| PC13–PC15 | RTC-related pins | PC13 = RTC_OUT, PC14/PC15 = LSE crystal connections - essential for calendar functionality and clock accuracy |
| PA9/PA10 | USB DP/DM | Dedicated full-speed USB 2.0 transceiver pins - require no external PHY; support LPM and battery charging detection (BCD) |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 30 nA shutdown and 420 nA Stop 2 with RTC - extends coin-cell battery life beyond 10 years in maintenance-free deployments |
| ART Accelerator™ | Eliminates Flash wait states at 80 MHz - delivers deterministic 100 DMIPS performance without SRAM code shadowing overhead |
| Dual SAI interfaces | Support I²S, PCM, and SPDIF protocols with independent clocks - enables stereo audio capture + playback or TDM microphone arrays in one MCU |
| Capacitive touch sensing (TSC) | 21-channel controller with built-in charge transfer - replaces mechanical buttons in medical handhelds with waterproof, ESD-robust UI |
| True random number generator (RNG) | NIST SP800-90B compliant entropy source - satisfies cryptographic key generation requirements for TLS 1.2/1.3 handshakes |
Applications
| Industrial Sensor Node | Portable ECG Monitor |
|---|---|
Use Scenario: Wireless vibration and temperature sensor mounted on rotating machinery with 10-year battery life requirement. IC Role / Device Role / Timing Role: Primary controller executing FFT-based anomaly detection, managing BLE radio sleep/wake cycles, and timestamping sensor data via hardware RTC. Use Value: 420 nA Stop 2 mode with RTC preserves time context across deep sleep; dual ADCs acquire synchronized accelerometer and thermistor signals at 1 kSPS. | Use Scenario: Handheld electrocardiogram device powered by CR2032 battery, performing real-time QRS detection and Bluetooth LE streaming. IC Role / Device Role / Timing Role: Signal acquisition hub interfacing with analog front-end (AFE), running adaptive filtering algorithms, and driving OLED display via SPI. Use Value: 2× OPAMPs with PGA condition raw electrode signals; LPUART wakes CPU from Stop 2 on command; SAI outputs audible heartbeat playback. |
| Smart Building HVAC Controller | Automotive Cabin Air Quality Module |
Use Scenario: Wall-mounted thermostat integrating CO₂, VOC, and humidity sensing with Modbus RTU gateway functionality. IC Role / Device Role / Timing Role: Fieldbus interface processor handling RS-485 timing-critical framing, sensor fusion, and non-volatile configuration storage. Use Value: CAN 2.0B interface connects to vehicle bus; 3× ADCs simultaneously sample NDIR CO₂ sensor, metal-oxide VOC detector, and capacitive humidity element. | Use Scenario: In-cabin air quality monitor using PM2.5, NO₂, and formaldehyde sensors, reporting via CAN to head unit. IC Role / Device Role / Timing Role: Low-power sensor aggregator with CAN message scheduling, thermal compensation, and fault logging to backup registers. Use Value: VBAT domain powers RTC and 32×32-bit backup registers during ignition-off; -40 °C to +105 °C rating ensures reliability under dashboard thermal cycling. |
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 | 64 KB Flash, 16 KB SRAM, no SAI or CAN, LQFP32 package | Targeted at cost-sensitive, size-constrained IoT endpoints without audio or fieldbus needs | Select when audio processing and CAN are unnecessary and PCB area is critical |
| STM32L552RET6 | ARM TrustZone®, 512 KB Flash, 256 KB SRAM, same LQFP64, higher security features | Required for secure boot, encrypted firmware updates, and PSA Level 2 certification | Select when hardware-enforced isolation and cryptographic acceleration are mandatory |
Compared with STM32L432KCU6, the STM32L475RCT3 adds dual SAI, CAN, and 4× more Flash/SRAM - justifying its use in feature-rich edge nodes. Versus STM32L552RET6, it trades TrustZone and larger memory for lower cost and proven qualification in long-lifecycle industrial programs.
Availability
STM32L475RCT3 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical devices, smart building controllers, and automotive cabin modules requiring stable component supply across multi-year production ramps.
Supply support for STM32L475RCT3 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 analog components for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-microwatt, integrated analog, and robust security - optimized for battery-operated edge intelligence and energy-efficient automation.
FAQ
What is the maximum operating frequency and associated performance metric of the STM32L475RCT3?
The STM32L475RCT3 operates at up to 80 MHz with an Arm Cortex-M4 core featuring FPU and ART Accelerator™, delivering 100 DMIPS (Dhrystone 2.1) and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance level supports real-time signal processing, such as FFT-based vibration analysis or adaptive filtering in sensor nodes, without requiring external DSP hardware.
How does the STM32L475RCT3 achieve ultra-low power consumption in deep-sleep modes?
The device achieves 420 nA in Stop 2 mode with RTC active through hardware-managed voltage scaling, selective peripheral clock gating, and retention of only essential registers and RTC logic. The VBAT domain maintains RTC and 32×32-bit backup registers at 300 nA, enabling calendar-aware wake-up events and state preservation during multi-year battery operation without external supervision.
Which communication interfaces support low-power wake-up capability from Stop modes?
LPUART and selected EXTI-capable GPIOs (5 dedicated wakeup pins) support wake-up from Stop 2 mode. LPUART retains asynchronous receive capability with minimal current draw, allowing host-initiated commands to resume full operation - critical for remote configuration of battery-powered field devices without continuous polling.
Does the STM32L475RCT3 include hardware security features beyond basic readout protection?
Yes - it includes a true random number generator (RNG) compliant with NIST SP800-90B, CRC calculation unit, 96-bit unique ID, and optional firewall for memory region protection. While it lacks ARM TrustZone® (found in STM32L5), its RNG and unique ID enable secure key derivation and device authentication in TLS-based cloud connectivity stacks.
STM32L475RCT3 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, 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L475RCT3 FAQ
1.How can I place an order for STM32L475RCT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L475RCT3 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 STM32L475RCT3 reliable?
The price and inventory of STM32L475RCT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L475RCT3 is usually 5 days.
3.What payment methods are accepted for STM32L475RCT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L475RCT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L475RCT3?
STM32L475RCT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L475RCT3 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 STM32L475RCT3?
For technical support, including STM32L475RCT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L475RCT3 requirements.
6.How does Aetrix verify that STM32L475RCT3 is sourced from the original manufacturer or authorized distributors?
All STM32L475RCT3 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 STM32L475RCT3 meets industry standards.
7.What is the process for return or replacement of STM32L475RCT3?
All STM32L475RCT3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L475RCT3, 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 STM32L475RCT3 part is unused and in its original packaging.
Return procedure for STM32L475RCT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L475RCT3 Tags
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ATTINY4-TSHR
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