STMicroelectronics STM32L152CCU6

Overview

STM32L152CCU6 from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 256 KB Flash, 32 KB SRAM, 8 KB EEPROM with ECC, integrated LCD controller (8×40 segments), and USB 2.0 interface. It operates from 1.65 V to 3.6 V across –40 °C to +105 °C and delivers 1.25 DMIPS/MHz performance for battery-powered sensor nodes and portable medical devices.

For engineers reviewing the STM32L152CCU6 datasheet, STM32L152CCU6 pinout, STM32L152CCU6 application, or STM32L152CCU6 equivalent, key selection criteria include standby current (0.29 µA), 12-bit dual-channel DAC with buffers, 12-bit 1 Msps ADC with 25 channels, and ultra-low-power comparators with wake-up capability.

Technical Context

The STM32L152CCU6 integrates a Cortex-M3 core with Memory Protection Unit (MPU) and dynamic voltage scaling supporting CPU frequencies up to 32 MHz. Its power architecture includes five low-power modes-Run, Sleep, Low-power Run, Stop, and Standby-with dedicated regulators and clock gating per peripheral domain.

Clock management combines multiple sources: HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz), plus a dedicated 48 MHz PLL for USB. Analog subsystems include two operational amplifiers, two ultra-low-power comparators, and temperature-sensing capability with calibrated VREFINT.

Key Specifications

Pinout & Package

STM32L152CCU6 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad. This compact, lead-free RoHS-compliant package supports high-density PCB layouts and efficient thermal dissipation in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L152CCU6, STM32L432KCU6 trades EEPROM and LCD for FPU and security features, while EFM32PG12B500F1024GL125 offers deeper sleep at the cost of interface flexibility and on-chip display capability - making STM32L152CCU6 optimal for integrated, display-equipped, battery-powered measurement systems.

Availability

STM32L152CCU6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial sensor nodes, and portable medical diagnostic tools requiring stable component supply across multi-year production cycles.

Supply support for STM32L152CCU6 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 automotive semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust memory integrity, and integrated analog peripherals - optimized for metering, healthcare, and IoT edge nodes operating across industrial temperature ranges.

FAQ

What is the maximum operating frequency of the STM32L152CCU6?

The STM32L152CCU6 achieves a maximum CPU frequency of 32 MHz using its internal 16 MHz HSI oscillator with PLL multiplication or an external HSE crystal. Frequency scaling is dynamically managed via the voltage regulator to maintain ultra-low-power operation across voltage ranges from 1.65 V to 3.6 V.

Does the STM32L152CCU6 support USB device functionality without an external crystal?

Yes. The STM32L152CCU6 integrates a 48 MHz PLL dedicated to USB, allowing full-speed (12 Mbps) device-mode operation using only the internal 16 MHz HSI oscillator - eliminating the need for an external 48 MHz crystal or oscillator and reducing BOM cost and board area.

How many capacitive sensing channels does the STM32L152CCU6 support?

The STM32L152CCU6 supports up to 23 capacitive sensing channels via its integrated touch sensing controller (TSC). These channels operate independently with hardware-accelerated acquisition, programmable charge transfer, and built-in noise filtering - enabling robust slider, wheel, and button implementations without additional ICs.

Is the 8 KB EEPROM truly erasable and writable during application execution?

Yes. The 8 KB data EEPROM is implemented as a separate memory block with ECC protection and supports byte/word erase and write operations while the application runs from Flash. It endures 400,000 write/erase cycles and retains data for 20 years at 85 °C, making it suitable for storing calibration data, device configuration, and usage counters in field-deployed equipment.