STMicroelectronics STM32L476ZGJ6

Overview

STM32L476ZGJ6 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 targets battery-powered IoT edge nodes requiring long runtime, real-time sensor fusion, and human interface (LCD/touch) in compact industrial or medical wearables.

For engineers reviewing the STM32L476ZGJ6 datasheet, STM32L476ZGJ6 pinout, STM32L476ZGJ6 application, or STM32L476ZGJ6 equivalent, key selection criteria include sub-µA shutdown current (30 nA), dual 12-bit DACs with sample-and-hold, 3× 12-bit ADCs at 5 Msps, CAN 2.0B interface, and UFBGA144 package compatibility with high I/O density (114 pins, 5 V-tolerant).

Technical Context

The STM32L476ZGJ6 integrates an Adaptive Real-Time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a memory protection unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its FlexPowerControl architecture supports dynamic voltage scaling across seven low-power modes, including Stop 2 (1.1 µA) with 4 µs wakeup and VBAT mode (300 nA) for RTC + 32×32-bit backup registers.

Clock system includes three PLLs (system/USB/audio), four oscillator sources (4–48 MHz HSE, 32 kHz LSE, 16 MHz HSI, 32 kHz LSI), and auto-trimmed MSI (±0.25%) - enabling precise timing for USB, audio SAI, and RTC calendar functions without external crystals in cost-sensitive designs.

Key Specifications

Pinout & Package

STM32L476ZGJ6 is housed in a 144-ball Ultra-Fine-Pitch Ball Grid Array (UFBGA144) package with 0.8 mm ball pitch and 10 mm × 10 mm body size, optimized for high-density PCB layouts and thermal dissipation in compact enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L476ZGJ6, STM32L475VGT6 trades LCD and flash capacity for simpler packaging and lower cost, while STM32L4R9AII6 upgrades performance and display capability but sacrifices SMPS integration and ultra-low-power optimization - making the ZGJ6 uniquely balanced for battery-powered segment-LCD HMI with fieldbus connectivity.

Availability

STM32L476ZGJ6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial HMI panels, and asset tracking beacons requiring stable component supply across multi-year production cycles.

Supply support for STM32L476ZGJ6 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 management ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32L4 series is engineered for ultra-low-power embedded applications demanding extended battery life, rich analog integration, and real-time performance - targeting IoT endpoints, wearable health devices, and energy-efficient industrial controllers.

FAQ

What is the maximum operating temperature for STM32L476ZGJ6?

The STM32L476ZGJ6 is rated for operation from -40 °C to +105 °C ambient temperature, validated per ST's industrial qualification standards. This extended range supports deployment in unventilated industrial cabinets, automotive cabin modules, and outdoor metering enclosures without derating.

Does STM32L476ZGJ6 support external memory expansion?

Yes - it integrates a Flexible Static Memory Controller (FSMC) supporting SRAM, PSRAM, NOR, and NAND memories, plus a Quad SPI interface for high-speed serial flash. These interfaces enable external code execution, large data buffers, and firmware-over-the-air (FOTA) storage without external memory management logic.

How does the integrated SMPS improve power efficiency?

The integrated switched-mode power supply (SMPS) replaces the traditional linear regulator, reducing active-mode current consumption from 100 µA/MHz (LDO mode) to 39 µA/MHz at 3.3 V. This 61% reduction extends battery life significantly in always-on sensor nodes and portable medical devices.

Is STM32L476ZGJ6 pin-compatible with other STM32L4xx variants?

No - the STM32L476ZGJ6 in UFBGA144 has a unique pinout optimized for its full peripheral set (e.g., LCD, DFSDM, dual DAC). While functionally similar to STM32L476VG/ZE in same package, it is not pin-compatible with LQFP or WLCSP variants due to differing ball/pad assignments and I/O multiplexing.