STMicroelectronics STM32L475RGT7TR

Overview

STM32L475RGT7TR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, delivering 100 DMIPS at 80 MHz, 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 STM32L475RGT7TR datasheet, STM32L475RGT7TR pinout, STM32L475RGT7TR application, or STM32L475RGT7TR equivalent, key selection criteria include its 30 nA shutdown current, 4 µs wakeup from Stop mode, FlexPowerControl architecture, and support for batch acquisition mode (BAM) in energy-constrained edge nodes.

Technical Context

The device implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash memory, paired with a Memory Protection Unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture integrates three voltage regulator modes (Run, Low-power Run, and Low-voltage) with dynamic voltage scaling and hardware-managed low-power modes down to 30 nA.

Clock system includes four independent sources: HSE (4–48 MHz), LSE (32.768 kHz), factory-trimmed HSI16 (±1%), and auto-calibrated MSI (100 kHz–48 MHz, ±0.25%). Three PLLs separately feed system, USB, and audio clocks - enabling concurrent high-fidelity audio streaming and real-time control without clock contention.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 114 fast I/Os - 93 of which are 5 V-tolerant, supporting mixed-voltage system interfacing and robust industrial signal routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L433RCT6P, the STM32L475RGT7TR adds 512 KB Flash, dual SAI, and USB OTG - justifying its use in feature-rich portable instruments; versus STM32L552RET6P, it trades TrustZone security for lower power and higher analog integration - optimal for cost-sensitive, battery-limited designs where crypto offload is handled externally.

Availability

STM32L475RGT7TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial predictive maintenance nodes, and portable gas analyzers requiring stable component supply across multi-year production cycles.

Supply support for STM32L475RGT7TR 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 products for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-microwatt, combining Cortex-M4 compute density with flexible power management and rich analog integration for intelligent edge devices.

FAQ

What is the maximum operating temperature range for STM32L475RGT7TR?

The STM32L475RGT7TR is qualified for industrial operation from –40 °C to +105 °C ambient temperature, with extended qualification up to +125 °C for specific variants - verified per JEDEC JESD22-A108 and tested across full voltage range (1.71–3.6 V) and clock frequencies (up to 80 MHz).

Does STM32L475RGT7TR support hardware encryption acceleration?

No, STM32L475RGT7TR does not include dedicated cryptographic accelerators (e.g., AES, PKA, or HASH). It relies on software libraries (STM32CubeL4) for encryption; for hardware-accelerated crypto, consider the STM32L552RET6P with TrustZone and AES-256 engines.

Can the internal 16 MHz RC oscillator (HSI16) be used as the system clock source?

Yes, HSI16 can serve as the main system clock source with ±1% factory trim accuracy - sufficient for UART communication, basic timing, and low-precision applications; however, USB OTG FS, SAI audio, and high-accuracy RTC require external crystal (HSE or LSE) or PLL-derived clocks.

How many DMA channels are available and what peripherals do they support?

The STM32L475RGT7TR integrates a 14-channel DMA controller supporting all major peripherals including ADC, DAC, SPI, I²C, USART, SAI, USB, SDMMC, and QUADSPI - with configurable priority levels and double-buffering for seamless streaming in audio and sensor applications.