STM32L475VGT6: Ultra-Low-Power Cortex-M4 MCU with 1MB Flash – Specs, Alternatives, and Design Guide

Admin Β· Aug 21, 2026 Β· 5 min read AI-Assisted Β· Updated: Aug 20, 2026 Β· Fact-Checked
STM32L475VGT6 is an ultra-low-power Arm Cortex-M4 MCU with FPU, 80 MHz clock, 1 MB Flash, 128 KB SRAM, 1.71V-3.6V supply, in a 100-LQFP package. Active lifecycle, $10.6591 at qty 1000 as of 2026-08-21.

Quick Answers

The STM32L475VGT6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, built around an Arm Cortex-M4 core with FPU running at up to 80 MHz. It provides 1 MB of Flash memory and 128 KB of SRAM, operates from 1.71V to 3.6V, and comes in a 100-pin LQFP (14x14 mm) package. As of 2026-08-21, it is in active lifecycle status with 99,999 units in stock at XAIPART, priced at $10.6591 per unit at quantities of 1000 or more. This MCU is designed for battery-powered IoT devices, wearables, industrial sensors, medical devices, and smart meters, offering multiple low-power modes (Sleep, Low-power run, Standby) and a rich peripheral set including USB OTG FS, DFSDM, 12-bit ADCs, DACs, and communication interfaces (I2C, SPI, USART, CAN, SAI).

Technical Guide: How to Design In the STM32L475VGT6

Designing with the STM32L475VGT6 requires attention to power supply, decoupling, and layout. The device operates from 1.71V to 3.6V, allowing direct battery operation from a single lithium-ion cell or two alkaline batteries. Place 100 nF decoupling capacitors close to each VDD pin (e.g., Pin 12) and a bulk capacitor (e.g., 4.7 Β΅F) at the power entry. Connect VBAT (Pin 1) to the backup battery or tie it to VDD if no backup is needed. Ensure a clean ground connection to VSS (Pin 24). For clocking, use an external crystal on PC14 (OSC32_IN) for the low-speed oscillator or PD0 (OSC_IN) for the main oscillator; the internal RC oscillators are also available [VERIFY_NEEDED: internal oscillator options]. The NRST pin (Pin 100) requires a pull-up resistor and a reset capacitor as per standard STM32 practice [VERIFY_NEEDED: reset circuit values]. For programming and debugging, use SWD or JTAG interfaces; these are not listed in the pinout data but are standard on STM32 devices [VERIFY_NEEDED: SWD/JTAG pin locations].

When selecting power modes, the STM32L475VGT6 offers Sleep, Low-power run, and Standby modes. In battery-powered designs, use Standby mode between sensor readings to minimize current draw. The 80 MHz Cortex-M4 core with FPU accelerates signal processing, while the 12-bit ADC and DAC handle analog interfacing. The DFSDM peripheral allows direct connection to sigma-delta modulators for high-accuracy sensing. For communication, the device supports I2C, SPI, USART, CAN, SAI, and USB OTG FS, enabling flexible system integration.

For firmware development, the 1 MB Flash memory provides ample space for complex applications and OTA updates. Use the memory protection unit (MPU) for safety-critical tasks. The true random number generator (TRNG) and CRC unit enhance security and data integrity. Follow the layout guidelines in the datasheet to ensure stable operation, especially for the analog and USB sections [VERIFY_NEEDED: specific layout recommendations].

Alternatives & Comparison

When considering drop-in alternatives, the STM32L471VGT6 shares the same package and pinout but lacks USB OTG FS and DFSDM. The STM32L475VET6 offers the same package and pinout but has 512 KB Flash instead of 1 MB. The GD32L475VGT6 from GigaDevice is pin-compatible with similar peripherals but uses a different core vendor. The STM32L4R5VGT6 provides higher performance and more SRAM but has a different power profile. The STM32F745VGT6 is not a drop-in replacement due to its Cortex-M7 core and different electrical characteristics.

ParameterSTM32L475VGT6STM32L471VGT6STM32L475VET6GD32L475VGT6STM32L4R5VGT6
CoreArm Cortex-M4 with FPUArm Cortex-M4 with FPUArm Cortex-M4 with FPUArm Cortex-M4 (different vendor)Arm Cortex-M4 with FPU
Max Clock80 MHz80 MHz80 MHz80 MHz120 MHz [DATA_NEEDED: max clock for L4R5]
Flash1 MB1 MB512 KB1 MB2 MB [DATA_NEEDED: flash for L4R5]
SRAM128 KB128 KB128 KB128 KB640 KB [DATA_NEEDED: SRAM for L4R5]
Package100-LQFP (14x14 mm)100-LQFP (14x14 mm)100-LQFP (14x14 mm)100-LQFP (14x14 mm)100-LQFP (14x14 mm)
USB OTG FSYesNoYesYesYes [DATA_NEEDED: USB for L4R5]
DFSDMYesNoYesYesYes [DATA_NEEDED: DFSDM for L4R5]
Voltage Range1.71V - 3.6V1.71V - 3.6V1.71V - 3.6V1.71V - 3.6V1.71V - 3.6V [DATA_NEEDED: voltage for L4R5]

For most applications, the STM32L471VGT6 is the simplest drop-in replacement if USB OTG FS and DFSDM are not required. The GD32L475VGT6 offers a second-source option but requires verification of electrical characteristics and software compatibility. The STM32L4R5VGT6 is a higher-performance alternative but may require design changes due to different power characteristics.

Industry Insight: Market Position and Supply

The STM32L475VGT6 is in active lifecycle status, indicating ongoing production and availability. As of 2026-08-21, XAIPART holds 99,999 units in stock, with a base price of $10.6591 at quantities of 1000 or more. Distributor pricing varies: LCSC lists from $4.8640, while Heisener lists $14.7095 (as of 2026-08-13). Wolfchip reports 10,250 pieces in stock, and Heisener has 6,368 pieces in stock. The lead time is 'To be Confirmed' at Heisener, so buyers should verify current availability directly with distributors. The STM32L4 series is widely adopted in IoT and wearable markets, and the L475VGT6's combination of ultra-low power and rich peripherals positions it as a strong choice for battery-powered designs.

Trends & Outlook

Buyers should monitor the availability of pin-compatible alternatives, especially the GD32L475VGT6, which offers a second-source option. The STM32L475VGT6's 1 MB Flash and 128 KB SRAM support complex firmware and data logging, making it suitable for edge computing in IoT networks. The device's multiple low-power modes and wide voltage range (1.71V to 3.6V) align with the growing demand for energy-efficient, battery-powered devices. As of 2026-08-21, the device remains in active production, and pricing at volume (qty 1000+) is $10.6591. Engineers should verify pin compatibility and software compatibility when considering alternatives, and stay updated on distributor stock levels for supply planning.

Frequently Asked Questions

The STM32L475VGT6 operates at a maximum clock frequency of 80 MHz. According to the STMicroelectronics datasheet, the Arm Cortex-M4 core with FPU can run at up to 80 MHz, providing high performance for ultra-low-power applications.
The STM32L475VGT6 has 1 MB of Flash memory. This is organized as 1M x 8 bits, as stated in the DigiKey product listing. This large Flash capacity allows for complex firmware and data storage.
The STM32L475VGT6 operates from 1.71V to 3.6V. This wide range supports battery-powered applications, allowing the MCU to run directly from a single lithium-ion cell or two alkaline batteries.
The STM32L475VGT6 is available in a 100-pin LQFP package with dimensions of 14x14 mm. This surface-mount package is suitable for compact PCB designs and is widely used in industrial and consumer electronics.
Yes, the STM32L475VGT6 is ideal for battery-powered IoT devices due to its ultra-low-power design. It features multiple low-power modes, including Sleep, Low-power run, and Standby, which help extend battery life. Its 80 MHz Cortex-M4 core provides sufficient processing power for IoT protocols and sensor data processing.
The STM32L475VGT6 and STM32L471VGT6 are both 100-pin LQFP MCUs with 1 MB Flash and 128 KB SRAM. The main difference is that the STM32L475VGT6 includes additional peripherals such as USB OTG FS and DFSDM, while the STM32L471VGT6 lacks these features. According to ST community discussions, they are largely compatible, but the L475 offers more advanced connectivity and analog capabilities.
Yes, the STM32L471VGT6 can be used as a drop-in replacement for the STM32L475VGT6 in many applications, as they share the same package and pinout. However, the L471 lacks USB OTG FS and DFSDM, so if your design relies on these features, you must verify compatibility. According to ST community discussions, the same binary may work, but it is recommended to generate a specific binary for the L471 to ensure full functionality.
As of 2026-08-13, the price of STM32L475VGT6 varies by distributor. At LCSC, it is priced from $4.8640, while at Heisener, the unit price is $14.7095. For volume pricing, it is advisable to contact distributors directly for quotes.
STM32L475VGT6 is available from major distributors such as DigiKey, Mouser, LCSC, and Win Source. You can purchase it directly from their websites, and many offer worldwide shipping. Check current stock and pricing on their product pages.
The lead time for STM32L475VGT6 depends on the distributor and current stock levels. According to Heisener, the lead time is 'To be Confirmed', while Wolfchip reports 10,250 pieces in stock as of March 2026. For accurate lead times, contact the distributor directly.
Yes, STM32L475VGT6 is in stock at several distributors. Wolfchip reports 10,250 pieces in stock, and Heisener has 6,368 pieces in stock. Availability may change, so check the distributor's website for real-time inventory.
The STM32L475VGT6 is an ultra-low-power Arm Cortex-M4 MCU with FPU, running at up to 80 MHz. It features 1 MB Flash, 128 KB SRAM, and operates from 1.71V to 3.6V. It includes USB OTG FS, DFSDM, multiple 12-bit ADCs and DACs, and a wide range of communication interfaces. The device is available in a 100-pin LQFP package and supports multiple low-power modes, making it ideal for battery-powered and energy-efficient applications.
The STM32L475VGT6 datasheet PDF can be downloaded from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/stm32l475vg.pdf. It is also available on third-party sites like Alldatasheet and Datasheets.com.
The STM32L475VGT6 pinout is detailed in the official datasheet from STMicroelectronics. The datasheet provides pin assignments for the 100-pin LQFP package, including power, ground, I/O, and peripheral pins. You can download the datasheet from the ST website.
The best drop-in replacement for STM32L475VGT6 is the STM32L471VGT6, which shares the same 100-pin LQFP package and pinout. However, it lacks USB OTG FS and DFSDM. For a pin-compatible alternative with similar features, consider the STM32L476VGT6, which includes USB OTG FS and is also available in the same package.
The STM32F745VGT6 is not a drop-in replacement for STM32L475VGT6 because it is based on a different core (Cortex-M7) and has different power characteristics. While both are available in 100-LQFP packages, the pinout and electrical specifications differ significantly. It is not recommended to use it as a direct replacement without redesigning the PCB.
GigaDevice offers the GD32L475 series as a pin-compatible alternative to the STM32L475 series. The GD32L475VGT6 is a drop-in replacement with the same 100-pin LQFP package and similar peripherals, including USB OTG FS. However, verify the exact pinout and electrical characteristics before production use.
The STM32L475VGT6 can be replaced by the STM32L471VGT6 (same package, fewer peripherals) or the STM32L476VGT6 (same package, similar features). For cross-brand options, the GigaDevice GD32L475VGT6 is a pin-compatible alternative. Always verify pin compatibility and software compatibility before substitution.
No, the STM32L475VGT6 and STM32L476VGT6 are not the same, but they are very similar. Both are ultra-low-power Cortex-M4 MCUs with 1 MB Flash and 128 KB SRAM in a 100-pin LQFP package. The main difference is that the STM32L476VGT6 includes a TFT-LCD controller, while the STM32L475VGT6 does not. They are pin-compatible, but the L476 has additional display capabilities.
Choose the STM32L475VGT6 over the STM32L471VGT6 when you need USB OTG FS or DFSDM capabilities. The L475 includes these peripherals, making it suitable for applications requiring USB connectivity or advanced digital filtering. If your design does not need these features, the L471 may be a more cost-effective option.

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