STMicroelectronics STM32L052T8Y7TR

Overview

STM32L052T8Y7TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 64 KB Flash, 8 KB SRAM, 2 KB EEPROM, USB 2.0 interface (crystal-less), and integrated 12-bit ADC (1.14 Msps) and DAC. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 0.8 µA Stop mode + RTC + 8-KB RAM retention-ideal for battery-powered industrial sensors and portable medical devices.

For engineers reviewing the STM32L052T8Y7TR datasheet, STM32L052T8Y7TR pinout, STM32L052T8Y7TR application, or STM32L052T8Y7TR equivalent, key selection criteria include ultra-low-power operation down to 0.27 µA Standby, USB crystal-less capability, ECC-protected memory, 45 5V-tolerant I/Os, and integrated capacitive touch sensing support for compact HMI designs.

Technical Context

The STM32L052T8Y7TR integrates an Arm Cortex-M0+ core with MPU, running at up to 32 MHz (0.95 DMIPS/MHz), supported by multiple clock sources: 1–25 MHz HSE, 32 kHz LSE for RTC, 16 MHz HSI16 (±1%), and self-calibrating 48 MHz HSI48 for USB. Its low-power architecture includes five operational modes-Run, Sleep, Low-power Run, Low-power Sleep, Stop, and Standby-with sub-µA retention states and <5 µs wakeup from Flash.

Analog subsystem includes a 12-bit ADC with up to 16 channels (1.14 Msps, down to 1.65 V), a 12-bit buffered DAC (down to 1.8 V), two ultra-low-power comparators (window mode + wake-up), and a temperature sensor with factory calibration. The device also features a 24-channel capacitive touch sensing controller (TSC) and hardware CRC unit.

Key Specifications

Pinout & Package

STM32L052T8Y7TR is housed in a 32-pin UFQFPN package (5 × 5 mm, 0.5 mm pitch), optimized for space-constrained PCB layouts in wearables and smart sensors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L052T8Y7TR, STM32L072KBU6 trades USB for enhanced security and memory headroom, while STM32L432KCU6 upgrades core performance and memory at the cost of significantly higher active power-making the L052 optimal for sub-µA standby-critical, USB-connected edge endpoints.

Availability

STM32L052T8Y7TR is available at Aetrix Electronics and suitable for battery-powered medical monitors, smart utility meters, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32L052T8Y7TR 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 analog products for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications-specifically battery-operated devices requiring multi-year runtime, robust memory integrity, and integrated analog peripherals without external support components.

FAQ

What is the maximum operating frequency and core type of the STM32L052T8Y7TR?

The STM32L052T8Y7TR features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS per MHz. Its maximum frequency is constrained by supply voltage and dynamic voltage scaling-achieving full 32 MHz only above 2.4 V, with reduced clock limits (e.g., 24 MHz) at 1.8 V per datasheet Table 4. This enables deterministic real-time execution while maintaining ultra-low active power.

Does the STM32L052T8Y7TR support crystal-less USB operation?

Yes-the device integrates a self-calibrating 48 MHz HSI48 RC oscillator with ±0.25% accuracy over temperature and voltage, explicitly designed for USB full-speed (12 Mbps) communication without an external crystal. This is confirmed in Section 3.18.5 and electrical characteristics Table 47 of DS10182 Rev 10, enabling simplified USB peripheral design and reduced BOM cost.

How many I/O pins are 5V tolerant, and what is their safe operating voltage range?

45 I/Os on the STM32L052T8Y7TR are 5V tolerant when VDD is powered (1.65–3.6 V), meaning they safely accept input voltages up to 5.5 V regardless of VDD level. This is specified in Section 2.1 and Table 13 of the datasheet, allowing direct interfacing with 5V logic, industrial sensors, or legacy peripherals without external level-shifting circuitry.

What is the endurance and retention specification for the integrated 2 KB EEPROM?

The 2 KB data EEPROM is rated for 100,000 write/erase cycles and 20-year data retention at 55 °C (or 40 years at 25 °C), with built-in ECC for single-bit correction and double-bit detection. These values are documented in Table 53 of DS10182 Rev 10 and validated across the industrial temperature range (–40 to +125 °C), making it suitable for long-life data logging in unattended equipment.