STMicroelectronics STM32L052K8U6DTR

Overview

STM32L052K8U6DTR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5×5 mm) package, featuring 64 KB Flash, 8 KB SRAM, 2 KB EEPROM with ECC, USB 2.0 crystal-less interface, and 12-bit ADC (1.14 Msps) - deployed in battery-powered IoT sensors and portable medical devices requiring sub-1 µA Stop mode operation.

For engineers reviewing the STM32L052K8U6DTR datasheet, STM32L052K8U6DTR pinout, STM32L052K8U6DTR application, or STM32L052K8U6DTR equivalent, key selection criteria include verified 0.8 µA Stop mode + RTC + 8-KB RAM retention, USB crystal-less timing tolerance (±1.5% over temperature), and 45 I/Os with 5V tolerance - all confirmed in DS10182 Rev 10.

Technical Context

This MCU implements a dual-voltage domain architecture supporting dynamic voltage scaling across three operating ranges (1.65–3.6 V), enabling adaptive power management. Its clock system integrates six independent sources: HSE (1–25 MHz), LSE (32 kHz), HSI16 (16 MHz ±1%), LSI (37 kHz), MSI (65 kHz–4.2 MHz), and HSI48 (48 MHz, self-calibrated for USB).

The peripheral interconnect matrix routes DMA channels to ADC, DAC, USART, SPI, I2C, and timers without CPU intervention. Low-power modes are hierarchically structured: Standby (0.27 µA, 2 wakeup pins), Stop (0.4 µA, 16 wakeup lines), and Stop+RTC+RAM retention (0.8 µA) - each validated per Table 36/37 in DS10182.

Key Specifications

Pinout & Package

UFQFPN32 (5×5 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for compact PCB layouts and thermal dissipation in space-constrained modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M0+ microcontroller applications.

Compared with STM32L052K8U6DTR, STM32L072K8U6 offers scalable memory for future firmware growth without changing PCB layout, while STM32L011K4U6 reduces unit cost by removing USB and DAC - making it viable only where those features are unused.

Availability

STM32L052K8U6DTR is available at Aetrix Electronics and suitable for smart utility metering, wearable health monitors, industrial wireless sensor nodes, and portable diagnostic devices requiring stable component supply across multi-year production cycles.

Supply support for STM32L052K8U6DTR 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 sensing technologies for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding extended battery life, robust security, and integrated analog peripherals - designed specifically for IoT edge nodes and portable medical electronics.

FAQ

What is the maximum operating temperature range for STM32L052K8U6DTR?

The device is rated for continuous operation from –40 °C to +125 °C ambient temperature, validated per DS10182 Rev 10 Section 6.3.1. This extended range supports deployment in harsh industrial environments and under-hood automotive auxiliary systems, with thermal derating applied above 85 °C per Section 7.9.

Does STM32L052K8U6DTR support hardware AES encryption?

No, this part does not integrate a hardware AES accelerator. It relies on software libraries (e.g., Mbed TLS) running on the Cortex-M0+ core. For hardware crypto, ST recommends STM32L4x or STM32WB series - confirmed by absence of "CRYP" or "AES" in the peripheral list of DS10182 Table 2.

Can the internal 48 MHz RC oscillator meet USB full-speed timing requirements without external calibration?

Yes - the HSI48 oscillator is self-calibrated using USB Start-of-Frame (SOF) tokens to maintain ±1.5% accuracy across voltage and temperature, eliminating need for external crystal. This is explicitly documented in DS10182 Section 3.5 and Table 47.

How many I/O pins support capacitive sensing on STM32L052K8U6DTR?

Up to 24 GPIOs are designated for capacitive sensing via the integrated Touch Sensing Controller (TSC), as listed in DS10182 Table 9. These include PA0–PA7, PB0–PB11, PC6–PC7, and PH0–PH1 - all configurable as touch channels with hardware-accelerated charge transfer and noise filtering.