STMicroelectronics STM32L052T6Y6TR

Overview

STM32L052T6Y6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5×5 mm) package, featuring 32 KB Flash, 8 KB SRAM, 2 KB EEPROM with ECC, 12-bit ADC (1.14 Msps), and USB 2.0 crystal-less interface. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 0.27 µA Standby current with 2 wakeup pins - deployed in battery-powered IoT sensor nodes requiring long-life operation and integrated analog sensing.

For engineers reviewing the STM32L052T6Y6TR datasheet, STM32L052T6Y6TR pinout, STM32L052T6Y6TR application, or STM32L052T6Y6TR equivalent, key selection criteria include verified low-power mode timing (3.5 µs wakeup from RAM), USB crystal-less compliance, 5V-tolerant I/O count (45 pins), and ECC-protected memory architecture for mission-critical firmware resilience.

Technical Context

The STM32L052T6Y6TR integrates a Cortex-M0+ core with MPU, running at up to 32 MHz using multiple clock sources: 16 MHz factory-trimmed HSI, 48 MHz self-calibrated RC for USB, 32 kHz LSE for RTC, and PLL for CPU scaling. Its interconnect matrix routes peripherals-including USB, dual I²C, four SPI, two USART, LPUART, and 7-channel DMA-to memory and I/O without arbitration bottlenecks.

Ultra-low-power operation is enabled by five distinct power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby), each with configurable retention (e.g., 8 KB RAM + RTC in Stop mode at 0.8 µA), programmable voltage detector (PVD), and brownout reset (BOR) with five thresholds - all validated down to 1.65 V supply and –40 °C ambient.

Key Specifications

Pinout & Package

STM32L052T6Y6TR uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32-pin layout optimized for compact PCB footprints and thermal performance in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L052T6Y6TR, STM32L072KBU6 offers extended memory and security features within identical packaging, while STM32L432KCU6 trades ultra-low-power efficiency for computational throughput - making the L052 optimal for cost-sensitive, battery-limited edge nodes where ECC memory and USB crystal-less operation are decisive.

Availability

STM32L052T6Y6TR is available at Aetrix Electronics and suitable for battery-powered IoT sensor nodes, portable medical monitors, and industrial wireless telemetry requiring stable component supply, long-term lifecycle assurance, and ECOPACK2-compliant sourcing.

Supply support for STM32L052T6Y6TR 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, MEMS, and automotive semiconductors since 1987.

The STM32L0 series targets ultra-low-power embedded applications - specifically optimizing for sub-1µA standby, fast wakeup, and integrated analog peripherals in space- and energy-constrained devices such as wearables and smart meters.

FAQ

What is the maximum operating frequency of the STM32L052T6Y6TR?

The STM32L052T6Y6TR runs at up to 32 MHz using its internal 16 MHz HSI oscillator with PLL multiplication or external crystal sources. This frequency is fully supported across the entire 1.65–3.6 V supply range and –40 to +125 °C temperature envelope, with 0.95 DMIPS/MHz performance measured under standard conditions.

Does the STM32L052T6Y6TR support USB without an external crystal?

Yes - it integrates a 48 MHz self-calibrating RC oscillator (HSI48) dedicated to USB 2.0 full-speed operation, eliminating the need for an external crystal or oscillator. The USB interface also includes built-in battery charging detection compliant with USB Battery Charging v1.2 specification.

How many I/O pins are 5V tolerant on the STM32L052T6Y6TR?

45 of the 51 general-purpose I/O pins are 5V tolerant when VDD is powered (1.65–3.6 V), enabling direct interfacing with 5V logic peripherals without external level shifters. This includes all pins mapped to GPIOA and GPIOB except NRST, BOOT0, and USB-specific pins.

Is the 2 KB EEPROM truly erasable and writable in-circuit?

Yes - the 2 KB data EEPROM is implemented as a dedicated memory block with hardware ECC, supporting byte/word erase and write operations via standard HAL library APIs. Endurance is rated at 100,000 write/erase cycles and data retention exceeds 20 years at 55 °C, validated per ST's DS10182 Rev 10 specification.