STMicroelectronics STM32L562QEI6

Overview

STM32L562QEI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 32-bit microcontroller with TrustZone® security, FPU, and integrated SMPS. It delivers 165 DMIPS at up to 110 MHz, features 512 KB Flash (dual-bank read-while-write), 256 KB SRAM (64 KB with hardware parity), and operates from 1.71 V to 3.6 V across –40°C to 125°C. It targets secure, battery-constrained edge nodes such as industrial wireless sensors and medical wearables requiring cryptographic acceleration and sub-μA standby.

For engineers reviewing the STM32L562QEI6 datasheet, STM32L562QEI6 pinout, STM32L562QEI6 application, or STM32L562QEI6 equivalent, key selection criteria include TrustZone-enforced peripheral isolation, on-the-fly Octo-SPI decryption, ULPMark-CP® score of 370, and dual-regulator support (LDO + SMPS) for dynamic power scaling in portable IoT endpoints.

Technical Context

The STM32L562QEI6 implements a dual-domain Arm Cortex-M33 core with hardware-enforced TrustZone separation: secure world handles root-of-trust boot, AES+PKA crypto operations, and HDP-protected firmware updates via TF-M, while non-secure world runs application code. Its FlexPowerControl architecture enables mode-specific current optimization - e.g., 17 nA Shutdown, 222 nA Standby with RTC, and 62 μA/MHz Run mode using the embedded SMPS step-down converter.

Security is enforced at silicon level: GTZC gates memory/peripheral access, TZSC configures securable I/Os, and tamper detection monitors voltage, temperature, and frequency anomalies. The ART Accelerator with 8 KB instruction cache ensures zero-wait-state execution from Flash at 110 MHz, while dual DMA controllers (14 channels) offload data movement for ADC, OCTOSPI, and USB transfers without CPU intervention.

Key Specifications

Pinout & Package

STM32L562QEI6 is packaged in WLCSP81 (4.36 × 4.07 mm), a wafer-level chip-scale package optimized for space-constrained portable designs. It features 81 solder bumps with 0.4 mm pitch and supports 114 fast I/Os (most 5 V-tolerant), including dedicated TrustZone-secured pins for tamper detection and secure debug disable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32U575ZIT6 and LPC55S69JBD100, the STM32L562QEI6 uniquely balances sub-μA power, on-die SMPS, and full TrustZone crypto acceleration - making it optimal for long-life, field-deployed devices where both energy autonomy and end-to-end data integrity are non-negotiable.

Availability

STM32L562QEI6 is available at Aetrix Electronics and suitable for industrial wireless sensors, portable medical monitors, smart utility meters, and secure asset trackers requiring stable component supply across extended product lifecycles.

Supply support for STM32L562QEI6 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, and automotive-grade ICs with strong focus on energy efficiency and functional safety.

The STM32L5 series is designed specifically for ultra-low-power, security-critical embedded applications - integrating TrustZone, cryptographic accelerators, and multi-rail power management to address the needs of certified IoT endpoints and medical devices.

FAQ

What is the maximum operating temperature range for STM32L562QEI6?

The STM32L562QEI6 is qualified for operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD47 and supports deployment in harsh industrial environments, such as inside electrical cabinets or outdoor utility enclosures, without derating.

Does STM32L562QEI6 support USB Type-C Power Delivery?

Yes - it integrates a dedicated UCPD (USB Type-C™ and Power Delivery) controller compliant with USB PD 3.0 specification. This enables native negotiation of voltage/current profiles (e.g., 5 V/3 A, 9 V/2 A) and role swapping (DFP/UFP) without external PD PHY, simplifying single-port charging and data interfaces.

How does the embedded SMPS differ from the LDO in power management?

The embedded SMPS is a synchronous step-down DC-DC converter delivering 62 μA/MHz efficiency at 3 V, while the LDO provides 106 μA/MHz. The SMPS requires external inductor/capacitor (per Table 9 in DS12736), but enables up to 42% lower active current; the LDO offers simpler layout and faster transient response for noise-sensitive analog sections.

Can STM32L562QEI6 execute code directly from external Octo-SPI flash?

No - code execution must originate from internal Flash or SRAM. However, the OTFDEC engine enables real-time decryption of external Octo-SPI memory contents during read access, allowing secure storage and retrieval of firmware assets, configuration data, or encrypted logs without exposing plaintext externally.