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STMicroelectronics STM32L475RGT6
- Part No.:
- STM32L475RGT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L475RGT6.pdf
- Description:
- IC MCU 32BIT 1MB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:16,053
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Product details
Overview
STM32L475RGT6 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, and two op-amps - deployed in battery-powered industrial sensors and portable medical monitors.
For engineers reviewing the STM32L475RGT6 datasheet, STM32L475RGT6 pinout, STM32L475RGT6 application, or STM32L475RGT6 equivalent, key selection criteria include low-power mode current (420 nA Standby with RTC), 114 I/Os (most 5 V-tolerant), FlexPowerControl architecture, ART Accelerator™ for zero-wait-state Flash execution, and hardware cryptographic support via RNG and CRC.
Technical Context
The STM32L475RGT6 integrates an Arm Cortex-M4 core with FPU and Adaptive Real-Time Accelerator (ART™) enabling deterministic 0-wait-state execution from Flash at 80 MHz. Its power architecture includes five low-power modes (Shutdown, Stop 0/1/2, Standby), each with validated wakeup latency (e.g., 4 µs from Stop) and distinct peripheral availability (e.g., LPUART and LPTIM active in Stop 2).
Analog subsystem features independent supply domains: three 12-bit ADCs support hardware oversampling up to 16-bit resolution and 200 µA/Msps efficiency; two DACs include sample-and-hold; two op-amps integrate programmable gain amplifiers; two ultra-low-power comparators enable precise threshold detection with sub-µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max frequency, 100 DMIPS performance - enables real-time DSP and control algorithms without external coprocessor. |
| Memory | 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 | 420 nA Standby with RTC, 1.1 µA Stop 2 mode, 4 µs wakeup - extends battery life in intermittent-sensing applications like wireless sensor nodes. |
| Analog | 3× 12-bit ADC (5 Msps, 16-bit oversampled), 2× 12-bit DAC, 2× op-amps with PGA, 2× comparators - enables high-fidelity signal acquisition and analog front-end integration. |
| Connectivity | USB OTG FS, 2× SAI, 5× USART, 3× SPI, 3× I²C, CAN 2.0B, SDMMC, QuadSPI - supports audio streaming, multi-protocol industrial comms, and external memory expansion. |
| I/O | 86 GPIOs (LQFP100 package), most 5 V-tolerant, up to 21 capacitive sensing channels - simplifies interface to legacy peripherals and enables touch HMI without external controllers. |
| Clock system | 4–48 MHz HSE, 32 kHz LSE, 16 MHz HSI16 (±1%), MSI auto-trimmed by LSE (±0.25%), 3 PLLs - ensures robust timing across temperature and voltage variations for clock-critical audio and comms. |
Pinout & Package
LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant and ECOPACK2® certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Core, analog, and I/O power supplies | Separate domains allow independent voltage scaling and noise isolation between digital logic and precision analog circuits. |
| VSS, VSSA, VSSIO2 | Digital, analog, and I/O ground returns | Split ground planes minimize coupling between high-speed switching and sensitive analog measurements. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os with multiple alternate functions | 86 user-accessible pins support configurable AF mapping (e.g., USART1_TX on PA9, SAI1_FS on PE4) - enables flexible board layout and peripheral routing. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external push-button or supervisor ICs for reliable power-on initialization. |
| BOOT0 | Boot mode selection | High at reset forces system memory boot (for DFU); low enables user Flash boot - critical for field firmware recovery and production programming. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Five distinct low-power modes with validated current draw and wakeup latency - enables precise energy budgeting for battery lifetime prediction in portable devices. |
| ART Accelerator™ | Zero-wait-state execution from Flash at 80 MHz - eliminates cache misses and jitter in time-critical control loops (e.g., motor commutation, audio sample processing). |
| Dual-bank Flash with ROP | Independent bank erase/program allows seamless firmware updates while executing from the other bank; proprietary readout protection prevents IP leakage. |
| Hardware crypto acceleration | True random number generator (RNG) and CRC calculation unit - accelerates secure boot, TLS handshake, and data integrity verification without CPU overhead. |
| Capacitive touch controller (TSC) | 21-channel hardware-accelerated touch sensing supporting touchkey, linear, and rotary sensors - replaces external touch ICs and reduces BOM cost in HMI designs. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Wireless temperature/humidity/pressure node with LoRaWAN backhaul, operating on coin-cell battery for >5 years. IC Role / Device Role / Timing Role: Main controller managing sensor acquisition (ADC/DAC), RF interface (USART + SPI), ultra-low-power scheduling (LPTIM + Stop 2), and secure OTA updates (RNG + CRC). Use Value: 420 nA Standby with RTC enables calendar-triggered wakeups; 5 V-tolerant I/Os simplify interfacing with legacy analog sensors; dual-bank Flash ensures fail-safe firmware upgrades. |
Use Scenario: Handheld ECG/SpO₂ monitor with OLED display, audio feedback, and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Central processor handling analog front-end (op-amps + ADC oversampling), audio playback (SAI + DAC), display interface (FSMC), and BLE comms (USART + LPUART). Use Value: Dual SAI interfaces drive stereo audio output; 16-bit oversampled ADC achieves clinical-grade signal fidelity; ART Accelerator ensures deterministic real-time waveform processing. |
| Smart Home Hub | Energy Metering Gateway |
Use Scenario: Battery-backed Zigbee/Z-Wave hub aggregating sensor data and acting as local automation controller. IC Role / Device Role / Timing Role: Host MCU managing multi-protocol radio stacks (via SPI/USART), capacitive touch UI (TSC), USB OTG for configuration, and RTC-based scheduling. Use Value: 21-channel TSC enables full touchpad UI; USB OTG FS supports direct PC configuration; 114 I/Os accommodate diverse radio module interfaces and expansion headers. |
Use Scenario: DIN-rail mounted meter gateway collecting data from CT/PT sensors and transmitting via NB-IoT or LTE-M. IC Role / Device Role / Timing Role: Precision measurement controller using sigma-delta filtering (DFSDM), isolated comms (CAN + RS-485 via USART), and secure data logging (Flash ROP + CRC). Use Value: 4× digital filters for sigma-delta modulators enable high-resolution energy computation; CAN 2.0B interfaces with legacy utility infrastructure; 128 KB SRAM buffers extended waveform captures. |
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-pin UFBGA, 256 KB Flash, 64 KB SRAM, no SAI or QuadSPI, single ADC | Suitable for cost-sensitive, space-constrained edge nodes without audio or high-speed memory needs | Select when audio, external memory, or >500 KB Flash are unnecessary - reduces PCB area and BOM cost. |
| STM32L552RET6 | ARM TrustZone®, 512 KB Flash, 256 KB SRAM, 110 µA/MHz run, 190 nA Standby, no SAI | Required for applications needing hardware-enforced security partitioning (e.g., secure bootloader, credential storage) | Choose when PSA Certified Level 1 compliance or secure firmware update is mandatory - trades audio capability for hardened security. |
Compared with STM32L475RGT6, the STM32L432KCU6 offers lower cost and footprint but omits audio and memory expansion; the STM32L552RET6 adds TrustZone security and lower standby current but removes SAI and reduces Flash density - selection depends on whether audio processing or hardware security dominates the system requirement.
Availability
STM32L475RGT6 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart home hubs, and energy metering gateways requiring stable component supply across multi-year production cycles.
Supply support for STM32L475RGT6 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 components for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, long battery life, and rich analog integration - optimized for IoT endpoints, wearables, and portable instrumentation.
FAQ
What is the maximum operating temperature range for STM32L475RGT6?
The STM32L475RGT6 is qualified for operation from –40 °C to +105 °C (industrial grade), with extended variants supporting up to +125 °C. This rating is validated per JEDEC JESD47 and applies to all specified electrical characteristics, including Flash endurance and analog accuracy, under continuous operation within this range.
Does STM32L475RGT6 support hardware encryption acceleration?
No, the STM32L475RGT6 does not include dedicated AES or PKA hardware accelerators. It provides a true random number generator (RNG) and CRC calculation unit for basic cryptographic primitives, but symmetric/asymmetric encryption must be implemented in software using the Cortex-M4's DSP instructions and memory protection unit (MPU).
Can the internal 32 kHz RC oscillator (LSI) be used for RTC calibration?
No - the LSI oscillator (±5% accuracy) is not suitable for RTC calibration. The RTC requires the 32.768 kHz low-speed external crystal (LSE) for calendar accuracy, or the internally calibrated MSI oscillator (auto-trimmed by LSE to ±0.25%) when LSE is unavailable. LSI is reserved for independent watchdog or low-power timer backup.
How many DMA channels are available and what peripherals do they support?
The STM32L475RGT6 integrates a 14-channel DMA controller supporting all major peripherals: ADC, DAC, SPI, I²C, USART, SAI, USB, SDMMC, and memory-to-memory transfers. Each channel is configurable for priority, circular buffering, and double-buffering - essential for high-throughput audio streaming and sensor data acquisition without CPU intervention.
STM32L475RGT6 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L475RGT6 FAQ
1.How can I place an order for STM32L475RGT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L475RGT6 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 STM32L475RGT6 reliable?
The price and inventory of STM32L475RGT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L475RGT6 is usually 5 days.
3.What payment methods are accepted for STM32L475RGT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L475RGT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L475RGT6?
STM32L475RGT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L475RGT6 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 STM32L475RGT6?
For technical support, including STM32L475RGT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L475RGT6 requirements.
6.How does Aetrix verify that STM32L475RGT6 is sourced from the original manufacturer or authorized distributors?
All STM32L475RGT6 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 STM32L475RGT6 meets industry standards.
7.What is the process for return or replacement of STM32L475RGT6?
All STM32L475RGT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L475RGT6, 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 STM32L475RGT6 part is unused and in its original packaging.
Return procedure for STM32L475RGT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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