STMicroelectronics STM32L452CCU6

Overview

STM32L452CCU6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 256 KB Flash, 64 KB SRAM, and integrated analog peripherals including a 12-bit 5 Msps ADC, dual 12-bit DACs, and ultra-low-power comparators. It supports external SMPS for 36 µA/MHz run efficiency and operates across -40 °C to 85 °C in UFBGA64 (5×5) package - deployed in battery-powered medical sensors and portable industrial data loggers.

For engineers reviewing the STM32L452CCU6 datasheet, STM32L452CCU6 pinout, STM32L452CCU6 application, or STM32L452CCU6 equivalent, key selection criteria include verified low-power mode current (22 nA Shutdown, 375 nA Standby+RTC), USB 2.0 full-speed crystal-less operation, SAI audio interface support, and FlexPowerControl architecture enabling BAM and sub-µA wake-up timing.

Technical Context

The STM32L452CCU6 implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, paired with a Memory Protection Unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture integrates dual voltage regulators (LDO/SMPS), brown-out reset (BOR), and VBAT domain supporting RTC + 32×32-bit backup registers.

Clock system includes dual PLLs (system/audio), auto-trimmed multispeed oscillator (±0.25%), 4–48 MHz HSE, 32 kHz LSE, and internal 48 MHz clock recovery - enabling precise timing for USB, audio, and ADC sampling without external crystals. Analog subsystem features independent supply domains, hardware oversampling (up to 16-bit), and built-in PGA for sensor signal conditioning.

Key Specifications

Pinout & Package

STM32L452CCU6 is housed in a 64-ball Ultra-Fine Pitch Ball Grid Array (UFBGA64) package with 0.5 mm ball pitch and 5×5 mm body size, optimized for high-density PCB layouts and thermal performance in battery-powered applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L452CCU6, STM32L476RG offers more memory but sacrifices audio capability and ultra-low-power precision, while STM32L552RE adds security at the cost of USB convenience and standby efficiency - making STM32L452CCU6 optimal for balanced audio-enabled, battery-critical designs.

Availability

STM32L452CCU6 is available at Aetrix Electronics and suitable for wearable health monitors, industrial wireless sensor nodes, portable diagnostic tools, and smart home energy monitors requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32L452CCU6 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 ICs, sensors, and automotive semiconductors with emphasis on energy efficiency and industrial reliability.

The STM32L4 series targets ultra-low-power embedded applications demanding rich analog integration, secure firmware execution, and extended battery life - particularly in medical, metering, and portable industrial equipment.

FAQ

Does STM32L452CCU6 support crystal-less USB operation?

Yes. The device integrates a Clock Recovery System (CRS) that synchronizes the internal 48 MHz RC oscillator to USB SOF packets, enabling full-speed USB 2.0 operation without an external 12 MHz crystal. This is validated per USB-IF specifications and documented in Section 3.33 of DS11912 Rev 7.

What is the maximum allowed VDD voltage and absolute maximum rating for I/O pins?

The absolute maximum VDD rating is 4.0 V, with recommended operating range of 1.71 V to 3.6 V. All I/O pins except BOOT0 and NRST are 5 V-tolerant up to 5.5 V when VDD is ≥ 2.0 V, as specified in Table 20 (Voltage characteristics) and Table 24 (I/O port characteristics) of the datasheet.

How many wakeup sources are available in Stop 2 mode?

Stop 2 mode supports wakeup from 5 dedicated wakeup pins (WKUP1–WKUP5), plus additional sources including LPUART, I²C address match, RTC alarm, and external interrupt lines mapped to EXTI0–EXTI15. Full listing appears in Table 4 of DS11912 Rev 7 under "STM32L452xx modes overview".

Is the 12-bit ADC capable of hardware oversampling to higher resolution?

Yes. The ADC supports configurable hardware oversampling ratios (2× to 256×) with automatic right-shift, achieving effective resolutions up to 16 bits. This is implemented in the ADC's oversampler unit and requires no CPU intervention - confirmed in Section 3.15 and Table 33 of the datasheet.