STMicroelectronics STM32L052C6T6

Overview

STM32L052C6T6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 32 MHz max CPU frequency, 64 KB Flash with ECC, 8 KB SRAM, and 2 KB EEPROM - deployed in battery-powered IoT sensors and portable medical devices requiring sub-1 µA Stop mode operation and USB 2.0 crystal-less connectivity.

For engineers reviewing the STM32L052C6T6 datasheet, STM32L052C6T6 pinout, STM32L052C6T6 application, or STM32L052C6T6 equivalent, key selection criteria include its 0.4 µA Stop mode current, 12-bit ADC (1.14 Msps), dual ultra-low-power comparators, USB LPM support, and 45 I/Os with 5V tolerance - all validated for industrial temperature range (-40 to +125 °C) and ECOPACK2 compliance.

Technical Context

The STM32L052C6T6 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling across three power ranges (1.65–3.6 V) and enabling precise low-power mode transitions - including Stop mode with RTC + 8 KB RAM retention at 0.8 µA and Standby mode at 0.27 µA with two wakeup pins.

Its clock system combines multiple internal oscillators (HSI16 ±1%, HSI48 for USB, LSI 37 kHz, MSI 65 kHz–4.2 MHz) plus external 1–25 MHz HSE and 32 kHz LSE, with PLL for CPU clock generation and CRS for USB clock recovery - all managed via RCC and PWR peripherals.

Key Specifications

Pinout & Package

STM32L052C6T6 uses the LQFP32 (7 × 7 mm) package with 32 pins, optimized for compact PCB layouts while maintaining full peripheral access and 5V-tolerant I/O capability on 45 pins (shared across variants).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L052C6T6, STM32L072CZT6 offers expanded memory and CAN for industrial gateways, while EFM32PG12B500F1024GL125 delivers superior DSP capability at the cost of USB integration - making STM32L052C6T6 optimal for USB-connected, battery-limited endpoints needing proven ST ecosystem support.

Availability

STM32L052C6T6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical diagnostics, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L052C6T6 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, 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 engineered for battery-operated devices demanding sub-µA sleep currents, robust security features, and seamless USB/Bluetooth connectivity without external timing components.

FAQ

What is the maximum operating frequency and core type of the STM32L052C6T6?

The STM32L052C6T6 features an Arm Cortex-M0+ core rated for up to 32 MHz operation. It includes a Memory Protection Unit (MPU) and achieves 0.95 DMIPS/MHz performance. The core operates across a 1.65–3.6 V supply range and supports dynamic voltage scaling to optimize power versus performance in real-time applications.

Does the STM32L052C6T6 support USB without an external crystal?

Yes - the STM32L052C6T6 integrates a factory-trimmed 48 MHz RC oscillator (HSI48) with Clock Recovery System (CRS) for USB 2.0 Full-Speed operation without an external crystal. This enables crystal-less USB connectivity, reducing BOM count and PCB area while supporting battery charging detection and Link Power Management (LPM).

How many I/O pins are 5V tolerant, and what is the package type?

The STM32L052C6T6 provides up to 45 5V-tolerant I/Os across its variant family; the C6T6 specifically uses the LQFP32 (7 × 7 mm) package with 32 pins. Pinout validation confirms PA0–PA15, PB0–PB11, and select alternate function pins retain 5V tolerance - verified in Section 6.3.13 of DS10182 Rev 10.

What low-power modes are supported, and what are their typical current draws?

The STM32L052C6T6 supports six low-power modes: Sleep (112 µA/MHz), Low-power Run (130 µA @ 1.8 V), Low-power Sleep (10 µA), Stop (0.4 µA), Stop with RTC + 8 KB RAM retention (0.8 µA), and Standby (0.27 µA). All values are measured at 25 °C per DS10182 Rev 10 Table 36–37 and validated across -40 to +85 °C.