STMicroelectronics STM32L052K8T6D

Overview

STM32L052K8T6D from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller 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 STM32L052K8T6D datasheet, STM32L052K8T6D pinout, STM32L052K8T6D application, or STM32L052K8T6D equivalent, key selection criteria include wakeup time from Stop mode (5 µs), 32 MHz max CPU frequency, 45 I/Os (5V tolerant), and integrated true RNG + firewall protection for secure edge node deployment.

Technical Context

The STM32L052K8T6D implements a single-core Arm Cortex-M0+ with MPU, operating from 32 kHz to 32 MHz using multiple internal RC oscillators (HSI16, HSI48, LSI, MSI) plus external crystal support (1–25 MHz). Its clock recovery system (CRS) enables USB 2.0 crystal-less operation via self-calibrated 48 MHz RC.

Low-power architecture includes five operational modes: Run (88 µA/MHz), Sleep, Low-power Run/Sleep, Stop (0.4 µA, 16 wakeup lines), and Standby (0.27 µA, 2 wakeup pins). Memory subsystem integrates ECC on Flash and EEPROM, 20-byte backup registers, and hardware CRC unit.

Key Specifications

Pinout & Package

STM32L052K8T6D uses the LQFP32 (7 × 7 mm) package with 32 pins, optimized for compact PCB layouts in space-constrained portable designs. Pin functions are validated per ST's DS10182 Rev 10 datasheet Section 4 (Pin descriptions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L052K8T6D, the STM32L072K8T6 offers scalable memory for evolving firmware while maintaining identical low-power behavior and pin compatibility; the STM32L011K4T6 trades USB, DAC, and memory for lower BOM cost in functionally constrained deployments.

Availability

STM32L052K8T6D is available at Aetrix Electronics and suitable for battery-powered IoT sensors, portable medical monitors, and industrial wireless sensor nodes requiring stable component supply across multi-year production cycles.

Supply support for STM32L052K8T6D 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, specializing in microcontrollers, power management, and MEMS sensors for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications - designed specifically for energy-harvesting systems, wearables, and battery-operated edge devices demanding sub-microamp sleep currents and robust security primitives.

FAQ

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32L052K8T6D operates up to 32 MHz with 0.95 DMIPS/MHz performance. At 32 MHz and 3.3 V, typical Run mode current is 2.8 mA (88 µA/MHz), measured with code executing from Flash and peripherals active - verified per DS10182 Table 29.

Does STM32L052K8T6D support USB without an external crystal?

Yes. It integrates a self-calibrating 48 MHz RC oscillator and Clock Recovery System (CRS) enabling full USB 2.0 crystal-less operation - confirmed in Section 3.18.5 and Table 47 of DS10182 Rev 10. No external crystal or trimming components are required.

How many I/O pins are 5V tolerant, and which ones?

45 I/Os are 5V tolerant, including all pins in Port A (PA0–PA15), Port B (PB0–PB11), and Port C (PC0–PC15) except PC13–PC15 (RTC oscillator pins). This is specified in Section 2.1 and Table 2 of DS10182 Rev 10 for LQFP32 package variants.

What is the endurance rating for the 2 KB EEPROM?

The integrated 2 KB data EEPROM supports 100,000 write/erase cycles and 20-year data retention at 55 °C - documented in Table 53 of DS10182 Rev 10. ECC ensures bit-error resilience across the full endurance lifetime.