STMicroelectronics STM32L476QGI6TR

Overview

STM32L476QGI6TR 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, LCD controller, and integrated SMPS support. It delivers 39 µA/MHz in SMPS-run mode, 420 nA Standby with RTC, and supports capacitive touch sensing - deployed in battery-powered medical wearables requiring long runtime and display capability.

For engineers reviewing the STM32L476QGI6TR datasheet, STM32L476QGI6TR pinout, STM32L476QGI6TR application, or STM32L476QGI6TR equivalent, key selection criteria include its dual-voltage I/O (1.08–3.6 V), 114 fast I/Os (most 5 V-tolerant), low-power timer availability in Stop mode, and hardware parity on 32 KB SRAM for safety-critical firmware execution.

Technical Context

This MCU integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside three independent PLLs for system, USB, and audio clock domains. Its FlexPowerControl architecture supports seven low-power modes - including Shutdown (30 nA), Stop 2 (1.1 µA), and Standby with RTC (420 nA) - managed via a dedicated power control block with brown-out reset and voltage scaling.

The device features a full interconnect matrix for concurrent peripheral access, dual-bank flash supporting read-while-write, and independent analog supply domains for ADC/DAC/OPAMP/COMP. It includes two 12-bit DACs with sample-and-hold, three 12-bit ADCs (5 Msps, 16-bit oversampling), and two operational amplifiers with programmable gain amplifiers - all operable under low-power conditions.

Key Specifications

Pinout & Package

UFBGA132 package with 132 solder balls in 7 × 7 mm body, 0.4 mm ball pitch, and ECOPACK2-compliant finish. Pinout validated per STMicroelectronics DS10198 Rev 11 Section 4 (Pinouts and pin description) and Package Info Section 7.4 (UFBGA132 package information A0G8).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L433RCT6, the STM32L476QGI6TR adds LCD, SMPS, and double memory - justifying use in display-rich, battery-optimized systems; versus STM32L552RET6, it trades security extensions for analog integration and touch capability - better suited for medical UIs than secure gateways.

Availability

STM32L476QGI6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, portable diagnostic tools, and industrial wireless sensor nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32L476QGI6TR 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, 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 rich analog integration, display support, and extended battery life - optimized for medical, metering, and portable industrial equipment.

FAQ

What is the maximum operating frequency and corresponding performance metric?

The STM32L476QGI6TR operates at up to 80 MHz with an ARM Cortex-M4 core featuring FPU and ART Accelerator™, delivering 100 DMIPS and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance is sustained with zero-wait-state flash execution, verified under VDD = 3.3 V and ambient temperature conditions per DS10198 Rev 11 Section 3.1.

Does this MCU support external SMPS, and how is it implemented?

Yes - the STM32L476QGI6TR includes dedicated VDD12 and VDD12_IO pins plus internal control logic to interface with an external switched-mode power supply. When enabled, SMPS mode reduces active current to 39 µA/MHz (vs. 100 µA/MHz in LDO mode), as confirmed in DS10198 Rev 11 Table 28 and Section 3.9.3.

What LCD configuration does the STM32L476QGI6TR support, and what are its drive capabilities?

The MCU integrates a segment LCD controller supporting up to 8×40 or 4×44 segments with integrated step-up converter. It drives common-electrode (COM) and segment (SEG) lines directly, eliminating external bias generation - validated in DS10198 Rev 11 Section 3.21 and Table 25, with typical contrast ratio >5:1 at 3.0 V supply.

How many I/O pins are 5 V-tolerant, and which voltage domains do they belong to?

Up to 114 I/Os are 5 V-tolerant, covering all GPIO ports (PA–PI) except those assigned to analog functions (e.g., ADC inputs, OPAMP non-inverting pins). These operate from VDDIO2 (1.08–3.6 V), with tolerance verified per DS10198 Rev 11 Section 6.3.14 and Absolute Maximum Ratings Table 20.