STMicroelectronics STM32L476ZGT6

Overview

STM32L476ZGT6 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, integrated LCD controller (8×40), and external SMPS support. It targets battery-powered portable medical devices, industrial sensors, and smart meters requiring long runtime and rich peripheral integration.

For engineers reviewing the STM32L476ZGT6 datasheet, STM32L476ZGT6 pinout, STM32L476ZGT6 application, or STM32L476ZGT6 equivalent, key selection criteria include its 39 µA/MHz SMPS-run efficiency, dual 12-bit DACs with sample-and-hold, 3× 12-bit ADCs (5 Msps), 2× op-amps with PGA, and 114 I/Os (most 5 V-tolerant) in LQFP144 package.

Technical Context

The device 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 access. Its FlexPowerControl architecture supports seven low-power modes - including 30 nA Shutdown and 420 nA Standby with RTC - managed via dedicated power control registers and BOR circuitry.

Clock system includes three PLLs (for CPU, USB, and audio), four oscillator sources (4–48 MHz HSE, 32 kHz LSE, 16 MHz HSI, and auto-trimmed MSI), and hardware calendar RTC with calibration. Analog subsystem features independent supply domains, 24-channel capacitive sensing (TSC), and DFSDM digital filters for sigma-delta modulators.

Key Specifications

Pinout & Package

LQFP144 (20 × 20 mm, 0.5 mm pitch) package with exposed thermal pad; 114 user I/Os, 10 power/ground pins, and dedicated debug (SWD/JTAG), reset, and boot configuration pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L432KCU6, the STM32L476ZGT6 delivers 4× more flash, LCD integration, and SMPS support for higher-feature edge devices; versus STM32L562ZEJ6, it trades security extensions and higher clock speed for lower cost and broader analog peripheral availability in industrial HMI designs.

Availability

STM32L476ZGT6 is available at Aetrix Electronics and suitable for portable medical monitors, smart energy meters, industrial wireless sensor nodes, and human-machine interface terminals requiring stable component supply across multi-year production cycles.

Supply support for STM32L476ZGT6 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 products for industrial, automotive, and consumer markets.

The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, rich analog integration, and long battery life - optimized for IoT endpoints, wearables, and smart infrastructure.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating?

The STM32L476ZGT6 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 per ST's benchmark conditions. This reflects sustained integer throughput under typical embedded workloads, not peak theoretical values.

Does this MCU support external memory expansion, and what interfaces are available?

Yes, the STM32L476ZGT6 supports external memory via two dedicated interfaces: the Flexible Static Memory Controller (FSMC) for SRAM, PSRAM, NOR, and NAND memories, and the Quad SPI (QUADSPI) interface for high-speed serial flash or RAM. Both are accessible in all package variants, with FSMC requiring specific pin mappings (e.g., PD0–PD7, PE7–PE15) and QUADSPI using PA0–PA3 plus PB0–PB2 in LQFP144.

How many analog-to-digital converters does it have, and what are their key specifications?

The device integrates three independent 12-bit ADCs, each capable of 5 Msps sampling rate. They support hardware oversampling up to 16-bit effective resolution, programmable sampling time, and flexible trigger sources (timers, EXTI, software). All ADCs operate from a dedicated VDDA supply (1.62–3.6 V) and include built-in temperature sensor and VREFINT channels for self-calibration.

Is the LQFP144 package RoHS-compliant and lead-free?

Yes, the STM32L476ZGT6 in LQFP144 package is ECOPACK2-compliant, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. It uses lead-free matte tin plating on pins and conforms to JEDEC J-STD-020 moisture sensitivity level 3 (MSL3), with a floor life of 168 hours at ≤30 °C/60% RH before reflow soldering.