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STMicroelectronics STM32L475RGT7
- Part No.:
- STM32L475RGT7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L475RGT7.pdf
- Description:
- IC MCU 32BIT 1MB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,449
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Product details
Overview
STM32L475RGT7 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 1 MB Flash, 128 KB SRAM, USB OTG FS, dual SAI audio interfaces, and integrated analog peripherals including three 12-bit ADCs (5 Msps), two 12-bit DACs, two op-amps, and two ultra-low-power comparators - deployed in battery-powered industrial sensors and portable medical monitors.
For engineers reviewing the STM32L475RGT7 datasheet, STM32L475RGT7 pinout, STM32L475RGT7 application, or STM32L475RGT7 equivalent, key selection criteria include its 30 nA shutdown current, 420 nA standby-with-RTC, BAM (Batch Acquisition Mode) for sensor hub operation, dual-bank read-while-write Flash, and LQFP100 package with 114 fast I/Os (most 5 V-tolerant).
Technical Context
The STM32L475RGT7 implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, paired with a memory protection unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture integrates three independent voltage regulators (main, low-power, and USB), supporting dynamic voltage scaling across six low-power modes.
Clock management includes four PLLs (system, USB, audio, ADC), auto-trimmed MSI (100 kHz–48 MHz, ±0.25%), and dedicated clock trees for analog domains (independent supply), audio (SAI), and real-time subsystems (RTC + calendar). The device supports hardware cryptographic acceleration via AES-128/256 and true random number generation (TRNG).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP filtering and sensor fusion without external co-processor. |
| Flash / SRAM | 1 MB dual-bank Flash (read-while-write), 128 KB SRAM (32 KB with parity) - supports secure firmware updates and fault-tolerant data logging. |
| Low-power modes | 30 nA shutdown, 420 nA standby-with-RTC, 1.1 µA Stop 2 - extends coin-cell battery life to >10 years in periodic wake-up sensing. |
| Analog peripherals | 3× 12-bit ADC (5 Msps, 16-bit oversampling), 2× 12-bit DAC, 2× op-amps with PGA, 2× comparators - enables closed-loop analog signal conditioning on-chip. |
| Audio & comms | 2× SAI, USB OTG FS (LPM/BCD), CAN 2.0B, SDMMC, 5× USART, LPUART - supports voice-enabled edge nodes with local audio preprocessing. |
| Timers & DMA | 16 timers (including 2× advanced motor-control, 2× low-power in Stop mode), 14-channel DMA - handles multi-sensor timestamping and autonomous PWM control during sleep. |
| Package | LQFP100 (14 × 14 mm), ECOPACK2® compliant - provides 114 I/Os (109 GPIO + 5 dedicated wakeup) with full 5 V tolerance on most pins. |
Pinout & Package
LQFP100 package with exposed thermal pad; 100-pin square outline, 0.5 mm pitch, JEDEC standard footprint. Pin functions validated per STMicroelectronics DS10969 Rev 5, Section 4 (Pinouts and pin description), Table 16.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Main, analog, and I/O power supplies | Independent 1.71–3.6 V domains enable noise-isolated analog acquisition and flexible I/O voltage translation. |
| VSS, VSSA, VSSIO2 | Ground returns | Dedicated analog ground (VSSA) and separate I/O ground (VSSIO2) minimize coupling in mixed-signal operation. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | 114 total fast I/Os; most support 5 V tolerance, multiple alternate functions (AF0–AF15), and configurable pull-up/down. |
| PC13–PC15 | RTC oscillator inputs | Connect 32.768 kHz crystal for hardware calendar, alarms, and precise wake-up timing in Standby/Stop modes. |
| PA9/PA10, PA11/PA12 | USB OTG FS D+/D− | Dedicated full-speed USB transceiver with internal PHY - eliminates need for external USB level-shifting components. |
| PD0/PD1 | OSC_IN/OSC_OUT | 4–48 MHz external crystal interface for main system clock; supports high-accuracy timing for audio sampling and communication baud rates. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables sub-1 µA Stop 2 mode with RTC and 4 µs wake-up - critical for duty-cycled IoT endpoints with strict energy budgets. |
| ART Accelerator™ | Zero-wait-state Flash execution at 80 MHz - delivers full CPU performance without SRAM code shadowing overhead. |
| Dual-bank Flash with ROP | Allows seamless firmware update via bank swap while maintaining application uptime; proprietary readout protection prevents IP leakage. |
| Capacitive touch controller (TSC) | 21-channel hardware-accelerated touch sensing - supports up to 12 touchkeys or rotary sliders without CPU intervention. |
| DFSDM filters | 4 digital filters for sigma-delta modulators - enables direct connection of MEMS microphones and pressure sensors with oversampled digital output. |
| SWPMI interface | Single-wire protocol master for smart battery packs and legacy automotive modules - reduces wiring complexity vs. UART/I²C. |
Applications
| Wearable Health Monitor | Smart Industrial Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG acquisition with motion artifact compensation and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Main controller executing sensor fusion algorithms, managing analog front-end (ADC/DAC/op-amps), and driving BLE radio via UART/LPUART. Use Value: 30 nA shutdown and 420 nA standby-with-RTC extend CR2032 battery life beyond 2 years; BAM mode synchronizes sensor sampling without CPU wake-up. |
Use Scenario: Wireless vibration/temperature node in predictive maintenance systems, operating unattended for months. IC Role / Device Role / Timing Role: Low-power data aggregator with FFT-based spectral analysis, SDMMC logging, and CAN/USB host diagnostics. Use Value: Dual-bank Flash enables field firmware updates without downtime; 128 KB SRAM buffers multi-axis accelerometer streams before compression. |
| Portable Audio Recorder | Energy-Harvesting Environmental Logger |
Use Scenario: Battery-powered stereo recorder using MEMS mics, onboard audio processing, and USB mass storage export. IC Role / Device Role / Timing Role: Audio subsystem controller handling I²S/SAI routing, 12-bit DAC playback, and USB OTG FS file transfer. Use Value: Two SAI interfaces support simultaneous mic input and headphone output; USB OTG FS with BCD enables direct charging and data sync from host PC. |
Use Scenario: Solar- or thermal-harvested soil moisture/air quality logger transmitting via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Ultra-low-power supervisor managing energy harvesting PMIC, analog sensor biasing, and LoRa modem wake-up sequencing. Use Value: 1.1 µA Stop 2 mode with RTC alarm ensures precise 15-min intervals; DFSDM filters digitize sigma-delta humidity sensors directly. |
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 |
|---|---|---|---|
| STM32L433RCT6 | 512 KB Flash, 64 KB SRAM, no SAI, no USB OTG, 80-pin LQFP - lower peripheral count and memory. | Suitable for simpler sensor nodes without audio or host connectivity; lacks dual-bank Flash and DFSDM. | Select when cost and footprint are constrained, and audio/USB/host features are unnecessary. |
| STM32L552RET6 | ARM TrustZone®, 512 KB Flash, 256 KB SRAM, 110 MHz Cortex-M33, 1.27 µA Stop 2 - enhanced security and higher performance. | Required for secure boot, encrypted OTA, and PSA-certified designs; higher active power than L4 series. | Choose when hardware root-of-trust, secure firmware updates, or higher compute throughput justify added cost and power. |
Compared with STM32L433RCT6, the STM32L475RGT7 adds SAI, USB OTG, DFSDM, and double the Flash/SRAM - justifying its use in audio-aware or field-upgradable systems; versus STM32L552RET6, it trades security extensions and peak frequency for lower static power and mature toolchain support.
Availability
STM32L475RGT7 is available at Aetrix Electronics and suitable for battery-powered medical wearables, industrial predictive maintenance sensors, portable audio recorders, and energy-harvesting environmental loggers requiring stable component supply across multi-year production cycles.
Supply support for STM32L475RGT7 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 analog chips 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 - optimized for intelligent edge devices where energy efficiency and peripheral flexibility are critical.
FAQ
What is the maximum operating temperature range for STM32L475RGT7?
The STM32L475RGT7 is qualified for industrial operation from –40 °C to +85 °C (ambient), with extended variants rated to +105 °C and +125 °C. This rating is confirmed in Section 6.3.1 of DS10969 Rev 5 and applies to the LQFP100 package under specified thermal conditions (θJA = 35 °C/W).
Does STM32L475RGT7 support hardware encryption?
Yes - it includes a dedicated AES-128/256 accelerator and true random number generator (TRNG) compliant with NIST SP800-90B. These peripherals operate independently of the CPU core and are accessible via DMA, enabling secure key derivation and encrypted firmware updates without software overhead.
Can the internal 32 kHz RC oscillator replace the external LSE crystal for RTC operation?
No - the internal 32 kHz LSI oscillator has ±5% accuracy and is not suitable for RTC calendar functions. Only the external 32.768 kHz crystal connected to PC13/PC14 (LSE) provides the ±20 ppm stability required for accurate timekeeping and alarm scheduling in Standby/Stop modes.
How many I/O pins support 5 V tolerance on STM32L475RGT7?
109 of the 114 general-purpose I/Os are 5 V-tolerant when VDD ≥ 2.0 V, as specified in Section 6.3.14 of DS10969 Rev 5. Exceptions include BOOT0, NRST, and certain debug pins (SWDIO/SWCLK); full pin-by-pin tolerance status is detailed in Table 16 of the datasheet.
STM32L475RGT7 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:
- 1MB (1M 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L475RGT7 FAQ
1.How can I place an order for STM32L475RGT7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L475RGT7 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 STM32L475RGT7 reliable?
The price and inventory of STM32L475RGT7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L475RGT7 is usually 5 days.
3.What payment methods are accepted for STM32L475RGT7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L475RGT7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L475RGT7?
STM32L475RGT7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L475RGT7 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 STM32L475RGT7?
For technical support, including STM32L475RGT7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L475RGT7 requirements.
6.How does Aetrix verify that STM32L475RGT7 is sourced from the original manufacturer or authorized distributors?
All STM32L475RGT7 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 STM32L475RGT7 meets industry standards.
7.What is the process for return or replacement of STM32L475RGT7?
All STM32L475RGT7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L475RGT7, 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 STM32L475RGT7 part is unused and in its original packaging.
Return procedure for STM32L475RGT7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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