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STMicroelectronics STM32L475RET6TR
- Part No.:
- STM32L475RET6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L475RET6TR.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:665
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Product details
Overview
STM32L475RET6TR 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, dual SAI audio interfaces, and integrated analog peripherals including three 12-bit ADCs (5 Msps) and two 12-bit DACs. It targets battery-powered IoT edge nodes requiring real-time audio processing, capacitive touch sensing, and secure low-power operation.
For engineers reviewing the STM32L475RET6TR datasheet, STM32L475RET6TR pinout, STM32L475RET6TR application, or STM32L475RET6TR equivalent, key selection criteria include its 30 nA shutdown current, 4 µs wake-up from Stop mode, dual 12-bit DACs with sample-and-hold, ART Accelerator™ enabling zero-wait-state Flash execution, and CAN 2.0B support for industrial sensor networks.
Technical Context
The device integrates an Adaptive Real-Time Accelerator (ART Accelerator™) that eliminates Flash wait states at 80 MHz, enabling deterministic real-time code execution. Its FlexPowerControl architecture supports seven low-power modes - including 30 nA Shutdown and 420 nA Standby with RTC - managed via a dedicated power control block with BOR and voltage scaling.
It features a dual-bank Flash memory (512 KB) supporting read-while-write and proprietary code readout protection, plus independent analog supply domains for 3× 12-bit ADCs (200 µA/Msps), 2× operational amplifiers with PGA, and 2× ultra-low-power comparators - all operable in Stop 2 mode with LPUART wake-up capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 80 MHz max frequency, 100 DMIPS performance |
| Memory | 512 KB Flash (dual-bank, RWW), 128 KB SRAM (32 KB with hardware parity) |
| Low-Power Performance | 30 nA Shutdown mode; 420 nA Standby with RTC; 4 µs wake-up from Stop mode |
| Analog Peripherals | 3× 12-bit ADCs (5 Msps, 16-bit oversampling), 2× 12-bit DACs, 2× OPAMPs with PGA, 2× comparators |
| Audio & Connectivity | 2× SAI interfaces, USB OTG FS (LPM/BCD), CAN 2.0B, SDMMC, SWPMI, IRTIM |
| Timers & Control | 16 timers including 2× advanced motor-control, 2× low-power 16-bit (active in Stop), 2× watchdogs |
| Package | LQFP64 (10 × 10 mm, 0.5 mm pitch), ECOPACK2® compliant |
Pinout & Package
LQFP64 package with 64 leads, 10 × 10 mm body, 0.5 mm lead pitch, and exposed thermal pad (EP). Pinout validated per STMicroelectronics DS10969 Rev 5, Section 4 ("Pinouts and pin description") and Table 16 ("STM32L475xx pin definitions").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Main, analog, and I/O power supplies | Independent domains enable noise-isolated analog operation; VDDA must be ≥ VDD for ADC/DAC accuracy |
| VSS, VSSA | Digital and analog ground returns | Separate analog/digital GND pins reduce coupling noise in mixed-signal operation |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | Up to 51 fast I/Os (5 V-tolerant on selected pins); support 16 alternate functions including SAI, USB, CAN |
| PC13–PC15 | RTC-related signals | PC13 = RTC_OUT/TS; PC14/PC15 = LSE crystal oscillator inputs (32.768 kHz) |
| PA11/PA12 | USB OTG FS D+/D− | Dedicated full-speed USB transceiver pins with internal pull-ups; require external ESD protection |
| PD0/PD1 | OSC_IN/OSC_OUT | 4–48 MHz external crystal interface for system clock; supports auto-trimming via LSE |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 30 nA shutdown and 420 nA standby with RTC - critical for multi-year battery life in wireless sensors |
| ART Accelerator™ | Eliminates Flash wait states at 80 MHz, ensuring deterministic real-time response without SRAM code relocation |
| Dual-bank Flash with RWW | Allows firmware updates over-the-air while executing from second bank - essential for robust field upgrades |
| Capacitive touch sensing (TSC) | 21-channel controller supporting touchkey, linear, and rotary sensors without external components |
| SAI audio interfaces | Two independent serial audio interfaces supporting I²S, PCM, and SPDIF protocols - enables stereo audio capture/playback |
Applications
| Smart Wearable Sensor Hub | Industrial Wireless Node |
|---|---|
Use Scenario: Compact wearable device aggregating PPG, accelerometer, and temperature data with local FFT processing and Bluetooth LE streaming. IC Role / Device Role / Timing Role: Primary application MCU handling sensor fusion, real-time DSP via Cortex-M4 FPU, and USB/SAI-based audio feedback. Use Value: 30 nA shutdown and 4 µs wake-up minimize quiescent drain during motion-triggered sampling intervals. | Use Scenario: Battery-powered vibration monitor mounted on rotating machinery, transmitting time-stamped waveform data via CAN bus to gateway. IC Role / Device Role / Timing Role: Edge signal processor running continuous ADC acquisition, timestamping via hardware RTC calendar, and CAN 2.0B frame generation. Use Value: Dual 12-bit ADCs (5 Msps) capture high-fidelity vibration spectra; CAN interface ensures deterministic industrial network integration. |
| Portable Medical Diagnostic Tool | Energy-Harvesting Environmental Monitor |
Use Scenario: Handheld ECG/EMG analyzer with analog front-end, LCD display, and USB-C charging/data export. IC Role / Device Role / Timing Role: System-on-chip managing analog signal conditioning (OPAMP + PGA), 12-bit DAC-driven reference generation, and SAI-driven audio alerts. Use Value: Integrated 2× OPAMPs with programmable gain eliminate need for external instrumentation amps in biopotential circuits. | Use Scenario: Solar-powered air quality node measuring PM2.5, CO₂, and humidity, waking periodically to transmit via LoRaWAN. IC Role / Device Role / Timing Role: Ultra-low-power host controlling energy harvesting PMIC, sensor I²C reads, and LPUART wake-up triggered by environmental thresholds. Use Value: 120 nA Standby mode with 5 wakeup pins allows precise event-driven activation - extending runtime beyond 10 years on small Li-SOCl₂ cells. |
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 | Single-bank 256 KB Flash, no SAI, no CAN, LQFP32 package, lower peripheral count | Suitable for simpler sensor endpoints without audio or fieldbus requirements | Select when cost and footprint are prioritized over audio/CAN connectivity and larger memory |
| STM32L552RET6P | ARM TrustZone® security, 512 KB Flash, same LQFP64, but higher active current (120 µA/MHz vs. 100 µA/MHz) | Required for applications needing certified secure boot, cryptographic acceleration, and tamper detection | Choose when PSA Level 3 certification, AES-256, and secure key storage are mandatory |
Compared with STM32L432KCU6, the STM32L475RET6TR delivers full audio (SAI), CAN, and larger memory for complex edge processing; versus STM32L552RET6P, it trades hardware security for lower active power and broader analog integration - making it optimal for cost-sensitive, battery-constrained industrial IoT nodes where functional safety suffices.
Availability
STM32L475RET6TR is available at Aetrix Electronics and suitable for industrial wireless sensors, portable medical diagnostics, smart wearables, and energy-harvesting environmental monitors requiring stable component supply across long-lifecycle deployments.
Supply support for STM32L475RET6TR 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 devices for industrial, automotive, and consumer markets.
The STM32L4 series is engineered for ultra-low-power embedded applications demanding rich analog integration, real-time performance, and extended battery life - targeting IoT edge nodes, portable healthcare, and smart industrial equipment.
FAQ
What is the maximum operating temperature range for STM32L475RET6TR?
The STM32L475RET6TR is rated for operation from –40 °C to +85 °C (industrial grade), as confirmed in Section 6.3.1 of DS10969 Rev 5. This range applies to the LQFP64 package variant and supports deployment in uncontrolled ambient environments such as factory floors and outdoor sensor enclosures.
Does STM32L475RET6TR support hardware encryption acceleration?
No - the STM32L475RET6TR does not include dedicated cryptographic accelerators (e.g., AES, PKA, HASH). It relies on software libraries for encryption. For hardware-accelerated crypto, ST's STM32L5 or STM32U5 series with TrustZone® and cryptographic peripherals are required.
Can the internal 32 kHz RC oscillator replace the external LSE crystal for RTC operation?
Yes - the internal low-power 32 kHz RC oscillator (±5% accuracy) can drive the RTC, but only when high timekeeping precision is not required. For calendar-grade accuracy (e.g., ±1 ppm), the external 32.768 kHz crystal on PC14/PC15 is mandatory, as specified in Section 3.11 and Table 48 of the datasheet.
How many DMA channels are available, and what peripherals do they support?
The STM32L475RET6TR integrates a 14-channel DMA controller (Section 3.13), supporting memory-to-memory transfers and peripheral-to-memory operations for ADC, DAC, SPI, I²C, USART, SAI, USB, SDMMC, and TIM. Each channel is configurable for priority, data width, and circular/burst mode per RM0351 reference manual.
STM32L475RET6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-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, 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:
- 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:
STM32L475RET6TR FAQ
1.How can I place an order for STM32L475RET6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L475RET6TR 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 STM32L475RET6TR reliable?
The price and inventory of STM32L475RET6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L475RET6TR is usually 5 days.
3.What payment methods are accepted for STM32L475RET6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L475RET6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L475RET6TR?
STM32L475RET6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L475RET6TR 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 STM32L475RET6TR?
For technical support, including STM32L475RET6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L475RET6TR requirements.
6.How does Aetrix verify that STM32L475RET6TR is sourced from the original manufacturer or authorized distributors?
All STM32L475RET6TR 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 STM32L475RET6TR meets industry standards.
7.What is the process for return or replacement of STM32L475RET6TR?
All STM32L475RET6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L475RET6TR, 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 STM32L475RET6TR part is unused and in its original packaging.
Return procedure for STM32L475RET6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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