STMicroelectronics STM32L476JGY3TR

Overview

STM32L476JGY3TR 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 STM32L476JGY3TR datasheet, STM32L476JGY3TR pinout, STM32L476JGY3TR application, or STM32L476JGY3TR equivalent, key selection factors include verified low-power mode current (e.g., 30 nA Shutdown), dual 12-bit DAC channels, 3× 12-bit ADCs at 5 Msps, CAN 2.0B interface, and UFBGA144 package compatibility with high I/O density (up to 114 pins, 5 V-tolerant).

Technical Context

This MCU integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a dual-voltage domain architecture supporting external SMPS for optimized efficiency. Its interconnect matrix decouples bus masters (CPU, DMA, peripherals), reducing contention and enabling deterministic real-time response in mixed-workload applications.

The device implements three independent PLLs - one for system clock, one for USB/SDMMC, and one for audio/SAI - allowing concurrent high-speed peripheral operation without clock domain conflicts. Low-power timers (LPTIM1/LPTIM2) remain active in Stop 2 mode, enabling precise wake-up timing while maintaining sub-µA power draw.

Key Specifications

Pinout & Package

STM32L476JGY3TR uses the UFBGA144 (10 × 10 mm, 0.8 mm pitch) package with 144 balls arranged in 12×12 grid. Ball A1 is marked with a laser dot; top-side marking includes "L476JGY3" and date code. The package supports 114 user I/Os, most 5 V-tolerant, with dedicated VDD/VSS pairs per quadrant for noise suppression.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power Cortex-M4 MCU applications.

Compared with STM32L476JGY3TR, STM32L4R9AII6 trades LCD/SMPS efficiency for graphics capability and memory headroom, while STM32L562ZEJ6Q sacrifices analog integration for hardware-enforced security - making the L476 optimal for cost-sensitive, display-enabled, battery-constrained edge nodes.

Availability

STM32L476JGY3TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial HMI panels, and portable diagnostic tools requiring stable component supply across multi-year production cycles.

Supply support for STM32L476JGY3TR 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, specializing in microcontrollers, power management, sensors, and automotive ICs - with over 40 years of embedded systems innovation.

The STM32L4 series targets ultra-low-power applications demanding rich analog integration, display support, and secure firmware execution - designed specifically for battery-operated IoT endpoints and portable medical devices.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating?

The STM32L476JGY3TR operates at up to 80 MHz with an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state flash execution. Its performance is rated at 100 DMIPS (Dhrystone 2.1), verified at 80 MHz with ART enabled and cache configured. This matches the 1.25 DMIPS/MHz benchmark and delivers 273.55 CoreMark® score (3.42 CoreMark/MHz).

Does this MCU support external SMPS, and what power savings does it deliver?

Yes, STM32L476JGY3TR includes dedicated VDD12 and control logic for external switch-mode power supply integration. In SMPS-run mode, it achieves 39 µA/MHz at 3.3 V - a 61% reduction versus 100 µA/MHz in internal LDO mode. This is validated per Table 28 of DS10198 Rev 11 under VDD12 = 1.10 V conditions.

How many ADC channels and what resolution/speed are supported?

The device integrates three independent 12-bit ADCs, each capable of 5 Msps sampling rate. Hardware oversampling allows effective resolution up to 16 bits (e.g., 4× oversampling yields 14-bit, 16× yields 16-bit). All ADCs support simultaneous sampling, injected/conversion modes, and analog watchdogs - confirmed in Section 3.15 and Table 27 of the datasheet.

Is the UFBGA144 package RoHS and REACH compliant?

Yes, the UFBGA144 package used for STM32L476JGY3TR is ECOPACK2-compliant, meeting both RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006 requirements. This is explicitly stated in Table 1 and Section 7.3 of DS10198 Rev 11, with lead-free matte tin finish and halogen-free molding compound.