STMicroelectronics STM32L462REI6

Overview

STM32L462REI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz, featuring 512 KB Flash, 160 KB SRAM, and integrated analog peripherals including a 12-bit 5 Msps ADC, dual 12-bit DACs, and hardware AES encryption. It supports USB 2.0 full-speed (crystal-less), CAN 2.0B, SAI audio interface, and RTC with HW calendar-deployed in battery-powered IoT sensor nodes requiring long runtime and secure firmware updates.

For engineers reviewing the STM32L462REI6 datasheet, STM32L462REI6 pinout, STM32L462REI6 application, or STM32L462REI6 equivalent, key selection criteria include its 2.05 µA Stop 2 mode current, 4 µs wakeup latency, 145 nA VBAT mode, 83 GPIOs (most 5 V-tolerant), and UFBGA100 package compatibility with high-density PCB layouts.

Technical Context

The device implements FlexPowerControl architecture with seven low-power modes (Shutdown, Standby, Stop 0/1/2, Sleep, Run), enabling sub-µA operation while retaining RTC, backup registers, and selective peripheral wake capability. Its ART Accelerator™ enables zero-wait-state execution from Flash at 80 MHz, and the interconnect matrix decouples bus arbitration for deterministic real-time response across DMA, CPU, and peripherals.

Clock system includes dual PLLs (system/audio), auto-trimmed MSI (100 kHz–48 MHz ±0.25%), HSE (4–48 MHz), LSE (32.768 kHz), and HSI48 for USB clock recovery. Analog subsystem features independent supply domains, 2x ultra-low-power comparators, 1x op-amp with PGA, and accurate 2.048 V/2.5 V buffered reference voltage.

Key Specifications

Pinout & Package

STM32L462REI6 is housed in a 100-pin Ultra-Fine Pitch Ball Grid Array (UFBGA100) package with 0.5 mm ball pitch and 7 mm × 7 mm body size, optimized for compact, high-I/O-density designs and thermal performance in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L476RGV6 and STM32L552RET6, the STM32L462REI6 delivers optimal balance of ultra-low static current (2.05 µA Stop 2), rich analog integration (ADC+DAC+op-amp+TSC), and proven field reliability-making it ideal for cost-sensitive, battery-operated edge nodes where security requirements stop short of hardware-enforced isolation.

Availability

STM32L462REI6 is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, smart metering interfaces, and audio edge processing nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32L462REI6 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32L4-series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and secure firmware execution-optimized for IoT endpoints, portable medical devices, and energy-harvesting systems.

FAQ

What is the maximum operating frequency and core type of STM32L462REI6?

The STM32L462REI6 integrates an Arm Cortex-M4 core with FPU, rated for up to 80 MHz operation. It achieves 100 DMIPS and supports DSP instructions. The Adaptive Real-Time Accelerator (ART Accelerator™) enables zero-wait-state execution from Flash memory at this frequency, confirmed in DS11913 Rev 5 Section 3.2.

Does STM32L462REI6 support crystal-less USB operation?

Yes. STM32L462REI6 includes an integrated HSI48 oscillator with clock recovery system (CRS), enabling full-speed USB 2.0 operation without an external crystal. This is documented in Section 3.34 and Table 50 of DS11913 Rev 5, with ±0.25% accuracy over temperature and voltage.

What low-power modes are available and what are their typical currents?

Seven low-power modes are supported: Shutdown (22 nA), Standby (106 nA), Standby with RTC (375 nA), Stop 2 (2.05 µA), Stop 1 (4.2 µA), Sleep (64 µA), and Run (84 µA/MHz). Values are measured at 3.3 V, 25 °C, with ART enabled and Flash active, per Tables 34–38 in DS11913 Rev 5.

Is the UFBGA100 package RoHS and REACH compliant?

Yes. The UFBGA100 package for STM32L462REI6 is ECOPACK2® compliant, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006 requirements. This is explicitly stated in the datasheet's "All packages are ECOPACK2® compliant" footnote on page 3.