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STM32L475RET6TR - STMicroelectronics

Name: STMicroelectronics STM32L475RET6TR
Brand: STMicroelectronics
SKU: STM32L475RET6TR
Availability: InStock
Rating: 5 (1 reviews)

Manufacturer Part Number: STM32L475RET6TR

Manufacturer: STMicroelectronics

Allelco Part Number: 41D-STM32L475RET6TR

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 11,250 pcs available, New & Original

Parts Description: LQFP-64(10x10)

Data sheet: -

Category: Integrated Circuits (ICs) > Specialized ICs

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In stock: 11250

Specifications

STM32L475RET6TR Tech Specifications
STMicroelectronics - STM32L475RET6TR technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - STM32L475RET6TR

Product Attribute	Attribute Value
Part Number	STM32L475RET6TR
Package	LQFP-64(10x10)
Description	LQFP-64(10x10)
Stock Condition	Get 11250 pcs available quantity at Allelco
Payment	PayPal / TT / Credit Card / Western Union
Allelco Certifications	ESD / ISO 9001 / ISO 13485 / ISO 28000

Product Attribute	Attribute Value
Manufacturer	STMicroelectronics
RoHs Status	-
Warranty	100% Perfect Functions
Transport port	Hong Kong
Shipping by	DHL / FedEx / UPS / TNT / SF Express
RFQ Email	info@allelco.com

Parts Introduction

Manufacturer Part Number

STM32L475RET6TR

Manufacturer

stmicroelectronics

Introduction

The STM32L475RET6TR is a high-performance, low-power 32-bit microcontroller based on the ARM® Cortex®-M4 core. It offers a wide range of integrated peripherals, including CAN, I2C, IrDA, LIN, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, and USB OTG, making it a versatile solution for a variety of embedded applications.

Product Features and Performance

ARM® Cortex®-M4 32-bit core with DSP and FPU

Operating frequency up to 80 MHz

512 KB of Flash memory and 128 KB of RAM

Extensive set of integrated peripherals

Low-power capabilities, including low-power modes and autonomous features

Wide operating voltage range of 1.71V to 3.6V

16-channel 12-bit ADC and 2-channel 12-bit DAC

Internal oscillator and temperature sensor

Product Advantages

High performance with low power consumption

Broad range of integrated peripherals for versatile applications

Robust and reliable design for industrial and commercial use

Easy to integrate and program with comprehensive development tools

Key Reasons to Choose This Product

Ideal for a wide range of embedded applications, from industrial control to healthcare and consumer electronics

Enables the development of energy-efficient and feature-rich designs

Seamless integration with existing systems and easy scalability

Backed by STMicroelectronics' extensive support and resources

Quality and Safety Features

Robust design and manufacturing process for reliable operation

Compliance with industry standards and regulations

Extensive testing and certification for quality assurance

Compatibility

The STM32L475RET6TR is compatible with a variety of development tools, software libraries, and operating systems, allowing for easy integration into your project.

Application Areas

Industrial automation and control

Medical and healthcare devices

Home automation and smart home systems

Wearable electronics and IoT devices

Portable and battery-powered applications

Product Lifecycle

The STM32L475RET6TR is an active product in STMicroelectronics' portfolio. There are equivalent or alternative models available, such as the STM32L476, STM32L485, and STM32L4A5 series. For more information or to explore alternative options, please contact our website's sales team.

Frequently Asked Questions(FAQ)

How does the STM32L475RET6TR compare to other STM32L4 series microcontrollers in terms of power efficiency and performance for battery-powered IoT applications?: The STM32L475RET6TR leverages STMicroelectronics' ultra-low-power STM32L4 architecture, achieving an 80MHz ARM Cortex-M4 core with FPU while maintaining dynamic voltage scaling down to 1.71V. With 512KB of flash memory and 128KB RAM, it provides sufficient code space and data handling for complex sensor fusion algorithms typical in IoT edge nodes. Compared to lower-density variants like the STM32L475VET6, it avoids flash memory bottlenecks when implementing over-the-air (OTA) updates or encrypted communication stacks. Its integrated peripherals—including USB OTG FS, SAI, QSPI, and multiple communication interfaces—enable direct connection to sensors, wireless modules, and memory devices without requiring external buffers, reducing overall system current draw during active and standby modes.

What are the key design considerations when selecting between the STM32L475RET6TR and a similar pin-compatible device like the STM32L476RETx for industrial control systems?: While both share the same 64-pin LQFP package and core specifications, the STM32L475RET6TR features 512KB of embedded flash versus 256KB in the STM32L476RETx. This difference becomes critical when deploying firmware with extensive diagnostic logging, secure boot sequences, or real-time motor control loops requiring large lookup tables. For industrial environments operating at -40°C to +85°C, the STM32L475RET6TR’s robust internal oscillator and stable clock tree ensure reliable timing across temperature extremes. Additionally, its support for MMC/SD via SDMMC interface enables seamless integration with file-based configuration storage on microSD cards—something not available on the L476 variant—making it preferable for field-programmable equipment.

Can the STM32L475RET6TR reliably drive capacitive touch sensors in consumer electronics under noisy RF conditions?: Yes, the STM32L475RET6TR includes hardware support for advanced capacitive sensing through its TS-CS peripheral, which integrates with the internal ADC to sample electrode signals with minimal CPU intervention. Operating within 1.71V to 3.6V allows compatibility with low-voltage touch panel drivers commonly used in mobile devices. However, effective implementation requires careful layout to minimize coupling from nearby switching regulators or wireless radios. The device’s internal voltage reference stability (±2% accuracy over temperature) ensures consistent threshold detection across the full operating range, enabling reliable gesture recognition even when sharing a PCB with Bluetooth or Zigbee modules.

Is the STM32L475RET6TR suitable for motor control applications requiring high-resolution PWM generation?: Absolutely. The STM32L475RET6TR includes four general-purpose timers with complementary outputs and dead-time insertion, capable of generating synchronized PWM signals up to 16-bit resolution at 80MHz system clock. When combined with DMA-driven current sensing via its 12-bit ADC (sampled at 1 MSPS), this enables efficient field-oriented control (FOC) for brushless DC motors. The presence of a DAC with 12-bit output further simplifies analog feedback loops for speed or position regulation. In comparison to entry-level MCUs lacking hardware floating-point units, the Cortex-M4 FPU accelerates trigonometric computations essential for real-time vector math in motor control firmware.

How does the STM32L475RET6TR handle electromagnetic interference (EMI) in automotive-grade designs?: Although rated for commercial temperatures (-40°C to +85°C), the STM32L475RET6TR incorporates several EMI mitigation features such as spread-spectrum clocking support and configurable I/O slew rates via GPIO port control registers. These allow designers to tailor signal transition speeds based on trace length and load capacitance. When paired with proper decoupling capacitors near VDD pins and ground plane isolation, the device meets basic automotive noise immunity requirements for non-critical subsystems. Note that full AEC-Q100 qualification would require additional testing beyond standard datasheet parameters, so application-specific validation is recommended for safety-relevant functions.

What programming and debugging interfaces does the STM32L475RET6TR support, and how do they affect production test strategies?: The STM32L475RET6TR supports SWD (Serial Wire Debug) and JTAG interfaces through dedicated test pads, enabling single-wire programming and real-time tracing during development. For mass production, ST’s built-in ROM bootloader allows firmware upload via UART, eliminating the need for expensive debug probes. However, security features like RDP (Read Protection Level 1) must be disabled before using the bootloader, which adds a verification step in manufacturing flows. Engineers should also consider the impact of option bytes on erase cycles—each mass-erase operation reduces flash endurance by one cycle, though 10k cycles typically suffice for most production scenarios.

How much current does the STM32L475RET6TR consume in run mode versus stop mode, and what trade-offs exist between performance and power savings?: In run mode at 80MHz with full peripherals active, the STM32L475RET6TR draws approximately 29 mA from a 3.3V supply. During STOP2 mode with RTC running, consumption drops below 1 µA, enabling multi-year battery life in intermittent sampling applications. Transitioning between states incurs wake-up latency: ~3 µs from STOP2 and ~25 µs from STANDBY. Designers must balance this against context-saving overhead; for example, saving 512 bytes of SRAM state before entering deep sleep takes ~50 µs, which may negate energy gains if duty cycles exceed 1%. Optimizing clock gating per peripheral usage can reduce active current by up to 40% without sacrificing responsiveness.

Can the STM32L475RET6TR interface directly with external SPI flash memory without a buffer IC?: Yes, through its Quad SPI (QSPI) controller, the STM32L475RET6TR supports up to 100 MHz clock speeds when communicating with serial NOR flash or PSRAM devices in octal mode. This eliminates the need for additional level-shifting or buffering circuits compared to standard SPI implementations, reducing BOM cost and PCB area. However, signal integrity becomes crucial above 50 MHz due to trace parasitics; controlled impedance routing and termination resistors may be necessary for reliable operation at higher frequencies. The QSPI peripheral also supports memory-mapped mode, allowing direct execution of code from external flash—a feature not available on all STM32L4 family members.

What is the maximum number of simultaneous analog inputs the STM32L475RET6TR can sample, and how does its ADC architecture limit concurrent measurements?: The STM32L475RET6TR integrates a 16-channel, 12-bit successive approximation register (SAR) ADC with a maximum sampling rate of 1 MSPS per channel. Only one conversion can occur at a time unless using injected channels or scan mode with interleaved sampling. To achieve true simultaneous acquisition, designers must multiplex inputs rapidly or use external ADCs. The internal temperature sensor and internal reference voltage add two fixed channels, leaving 14 programmable inputs. When driving capacitive loads or long cables, anti-aliasing filters and proper shielding are essential to maintain ENOB (Effective Number of Bits) above 10 bits across the entire input range.

How does the STM32L475RET6TR support secure firmware updates over-the-air (OTA)?: The STM32L475RET6TR includes hardware cryptographic acceleration via its AES, HASH, and RNG peripherals, supporting SHA-256 and AES-128/192/256 encryption/decryption in hardware. Secure boot can be implemented using the built-in read-out protection and write protection mechanisms, ensuring only signed firmware executes from flash. OTA updates typically reside in a separate partition protected by flash write-protection, preventing rollback attacks. The USB OTG FS interface provides a high-speed path for bulk transfers, while CAN FD or Ethernet (if paired with an expansion board) offers alternative transport layers. Careful management of flash wear leveling is required to avoid premature failure during frequent update cycles.

What are the implications of the STM32L475RET6TR’s Moisture Sensitivity Level (MSL) 3 rating for reflow soldering in surface-mount assembly?: As an MSL 3 component (168-hour floor life at 30°C/60% RH), the STM32L475RET6TR must be stored in dry ambient conditions before soldering. If exposed beyond 168 hours, it requires baking at 125°C for 24 hours prior to reflow to prevent popcorning during thermal cycling. Assembly houses typically track lot codes and usage timestamps to manage shelf-life compliance. Since the device uses a standard lead-free LQFP package, it conforms to JEDEC J-STD-020 standards for consumer electronics manufacturing. Failure to adhere to MSL guidelines risks delamination or interconnect fractures, especially in humid climates or extended storage periods.

How does the STM32L475RET6TR compare to newer STM32G0 or STM32U5 series in mixed-signal applications?: While the STM32L475RET6TR offers excellent power-performance balance for legacy designs, the STM32U5 introduces dynamic voltage and frequency scaling (DVFS) with sub-µA sleep currents and improved analog front-end linearity. However, the L475 retains advantages in mature toolchain support, third-party middleware availability, and deterministic interrupt response times. For applications requiring moderate computational load with strict real-time constraints—such as industrial automation—the L475 remains a cost-effective choice. The G0 series lacks floating-point support, making it unsuitable for algorithm-intensive tasks, whereas the U5’s additional peripherals come at a higher unit price and complexity.

Can the STM32L475RET6TR operate reliably with an external crystal oscillator instead of relying solely on its internal RC trim?: Yes, the STM32L475RET6TR supports external crystals up to 32 MHz via its HSE input, providing better long-term frequency stability (<±10 ppm vs. ±2% for internal MSI) and reduced phase noise compared to RC oscillators. Using an external crystal improves timing accuracy for communication protocols like USB or CAN, where clock jitter directly affects bit error rates. However, it increases PCB footprint and BOM cost. Automatic trimming of the internal HSI16 calibrates against HSE when available, minimizing drift over temperature without manual tuning.

What precautions should be taken when using the STM32L475RET6TR’s USB OTG FS peripheral in self-powered devices?: In self-powered configurations, the STM32L475RET6TR requires VBUS detection circuitry to distinguish host vs. device roles. The ID pin must be monitored to determine connection type, and pull-down resistors (typically 1.5 kΩ) ensure correct enumeration. Power delivery should comply with USB 2.0 Full-Speed specs (1.5 A max if acting as host), but the MCU itself cannot source more than 100 mA on its VDDUSB rail without violating electrical characteristics. Isolation between USB digital ground and analog grounds prevents noise coupling into sensitive ADCs or DACs.

How does the STM32L475RET6TR support real-time operating systems (RTOS) like FreeRTOS or ThreadX?: With 128 KB of SRAM and deterministic interrupt handling, the STM32L475RET6TR efficiently runs RTOS kernels with task switching latencies under 10 µs. Memory allocation for thread stacks and queues fits comfortably within available RAM, and its NVIC supports nested interrupts down to 16 priority levels. Hardware semaphores and mutexes can be implemented using atomic operations provided by the Cortex-M4, avoiding software overhead. The HAL/LL libraries simplify peripheral driver integration across RTOS contexts, though developers must guard shared resources carefully to prevent race conditions.

What is the significance of the STM32L475RET6TR’s 64-LQFP (10x10) package in compact embedded designs?: The 64-pin LQFP package with 0.5 mm pitch offers 51 GPIOs in a relatively small outline, enabling dense layouts without requiring ball-grid array (BGA) assembly techniques. Thermal performance is adequate for natural convection cooling in enclosure-mounted designs, though thermal vias under the package improve heat dissipation during sustained computation. Pinout symmetry aids signal routing for differential pairs and clock lines, reducing crosstalk. Compared to SOIC variants, the LQFP provides better mechanical robustness against vibration—important in automotive or industrial deployments.

How does the STM32L475RET6TR implement brown-out detection, and what thresholds are available for robust voltage monitoring?: The STM32L475RET6TR features three independent brown-out reset (BOR) levels selectable via option bytes: BOR0 (1.7–2.0 V), BOR1 (2.1–2.4 V), BOR2 (2.4–2.7 V), BOR3 (2.7–3.0 V), and BOR4 (3.0–3.6 V). During power-up or brown-out events, the MCU automatically resets and halts execution until voltage stabilizes above the selected threshold. This prevents erratic behavior during undervoltage conditions, which could corrupt flash writes or cause watchdog timeouts. Software can also monitor VREFINT for ADC calibration accuracy, adding another layer of system health checking.

What considerations apply when replacing the STM32L475RET6TR with a functionally equivalent part in existing designs?: Substituting with another STM32L475RET6TR is generally safe due to identical pinouts and register maps. However, minor revisions in silicon (e.g., Errata Sheet Revisions 2.1 vs. 3.0) may affect timing margins or peripheral behavior—always consult the latest errata before finalizing changes. If swapping with a different density variant (e.g., L475VET6), ensure sufficient flash/RAM for firmware growth and avoid hard-coded memory addresses. Clock configuration differences between models may necessitate recalibrating PLL settings or adjusting wait states for flash access at maximum frequency. Finally, verify RoHS and REACH status compliance matches target markets.

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Customer Reviews

Evaluation: 10 Articles

Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.

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Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

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