STMicroelectronics STM32L486VGT3

Overview

STM32L486VGT3 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 1 MB flash, 128 KB SRAM, USB OTG FS, LCD controller, and hardware AES encryption. It operates from 1.71–3.6 V, supports -40 °C to 105 °C, and achieves 100 DMIPS at 80 MHz-used in battery-powered industrial HMI, portable medical monitors, and smart metering endpoints requiring long runtime and secure firmware updates.

For engineers reviewing the STM32L486VGT3 datasheet, STM32L486VGT3 pinout, STM32L486VGT3 application, or STM32L486VGT3 equivalent, key selection criteria include its 39 µA/MHz SMPS-enabled run mode, dual 12-bit DACs with sample-and-hold, 3× 12-bit ADCs (5 Msps), LCD 8×40 support with integrated step-up converter, and CAN 2.0B interface for fieldbus connectivity.

Technical Context

The STM32L486VGT3 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 delivers multiple low-power modes-including 420 nA Standby with RTC and 45 µs wakeup from Stop-with dedicated voltage regulators (LDO/SMPS) and brown-out reset (BOR).

It features three independent clock domains: system (up to 80 MHz via PLL), USB/audio (48 MHz), and RTC (32 kHz LSE), plus internal oscillators auto-trimmed to ±0.25% accuracy. Analog subsystem includes 2× operational amplifiers with programmable gain, 2× ultra-low-power comparators, and 24-channel capacitive touch sensing-all with independent supply rails for noise isolation.

Key Specifications

Pinout & Package

LQFP100 package: 100-pin quad flat pack with 0.5 mm pitch, exposed thermal pad, RoHS-compliant ECOPACK2 finish. Pin mapping validated per DS10199 Rev 8 Section 4 (Pinouts and pin description), Table 16.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L476VGT6, the STM32L486VGT3 adds USB OTG FS and LCD support at identical footprint and price point; versus STM32U575VIT6, it trades advanced security and ultra-low power for proven LCD integration and pin-compatible upgrade path from L476.

Availability

STM32L486VGT3 is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical monitors, and smart electricity meters requiring stable component supply across extended product lifecycles.

Supply support for STM32L486VGT3 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 automotive-grade components since 1987.

The STM32L4 series targets ultra-low-power embedded applications-especially battery-operated industrial, medical, and metering systems-where energy efficiency, peripheral integration, and long-term supply stability are critical design constraints.

FAQ

What is the maximum operating temperature for STM32L486VGT3?

The STM32L486VGT3 is rated for industrial temperature range: −40 °C to +105 °C. This is confirmed in Section 6.3.1 of DS10199 Rev 8, and applies to all LQFP100 variants including the 'T3' suffix indicating tape-and-reel packaging with extended temp grade.

Does STM32L486VGT3 support external SMPS control?

Yes-it includes dedicated VDD12 and VDD12_IO pins to interface with external switching regulators, enabling 39 µA/MHz run-mode efficiency. The SMPS control logic is integrated into the power management unit (PMU), with automatic voltage scaling and seamless transition between LDO and SMPS modes.

Can the LCD controller drive a 4×44 segment display without external components?

Yes-the integrated LCD controller supports 4×44 or 8×40 configurations with an on-chip step-up converter, allowing operation from a single 3.3 V supply. No external boost IC or external bias resistors are required, as confirmed in Section 3.21 and electrical characteristics Table 6.3.25.

Is the STM32L486VGT3 pin-compatible with other STM32L4xx devices in LQFP100?

No-while it shares the LQFP100 package with STM32L476VGT6, pin functions differ significantly: STM32L486VGT3 assigns PF12–PF15 to LCD segments, whereas STM32L476VGT6 uses those pins for general-purpose I/O or ADC. Full compatibility requires verification against individual pin definition tables (DS10199 Table 16).