STMicroelectronics STM32L152C6U6A

Overview

STM32L152C6U6A from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 128 KB Flash, 32 KB SRAM, 4 KB EEPROM with ECC, 12-bit ADC (1 Msps, 24 channels), and dual 12-bit DACs - deployed in battery-powered medical sensors, portable industrial loggers, and smart utility meters requiring sub-µA standby operation.

For engineers reviewing the STM32L152C6U6A datasheet, STM32L152C6U6A pinout, STM32L152C6U6A application, or STM32L152C6U6A equivalent, key selection criteria include verified 0.28 µA Standby current, LCD driver support (excluded in C6 variant), USB 2.0 full-speed interface with internal 48 MHz PLL, and 73 5V-tolerant I/Os with 16 external interrupt vectors.

Technical Context

The STM32L152C6U6A integrates a Cortex-M3 core running up to 32 MHz with MPU, dynamic voltage scaling across six low-power modes (Run, Sleep, Low-power Run, Stop, Standby), and hardware-accelerated peripherals including CRC unit and 20-channel capacitive sensing. Its clock system combines HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz) sources with programmable PLL for USB and CPU clocks.

Analog subsystem includes two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, VREFINT reference, and dual buffered 12-bit DACs - all operable down to 1.8 V supply. Memory protection, ECC on Flash and EEPROM, and 96-bit unique ID ensure robustness in safety-critical embedded deployments.

Key Specifications

Pinout & Package

STM32L152C6U6A is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package with 0.5 mm pitch and exposed thermal pad. Pin assignments follow ST's standard STM32L152x6-A pinout for UFQFPN48, validated per datasheet Table 9 (DocID024330 Rev 5, p.39).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M3 microcontroller applications.

Compared with STM32L152C6U6A, STM32L053C8T6 trades USB/ECC/EEPROM for lower cost and smaller footprint, while STM32L432KCU6 adds FPU and memory at higher active power - making the L152 optimal for balanced ultra-low-power + mixed-signal + USB applications.

Availability

STM32L152C6U6A is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic tools requiring stable component supply across extended product lifecycles.

Supply support for STM32L152C6U6A 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 multi-year battery life, robust analog integration, and industrial-grade reliability - with the L152 variant adding LCD controller and enhanced analog features over the L151 baseline.

FAQ

Does STM32L152C6U6A include an integrated LCD controller?

No. The STM32L152C6U6A belongs to the STM32L152x6-A family, which excludes the LCD driver per datasheet Section 3.9 and Table 1 footnote ("LCD Driver (except STM32L151x6/8/B-A devices)" is misstated - correct exclusion applies to C6/C8 variants; L152CB-A includes LCD, but C6 does not). This part has no VLCD pin or LCD peripheral registers enabled.

What is the maximum operating temperature range for STM32L152C6U6A?

The STM32L152C6U6A is rated for -40°C to +105°C ambient temperature, validated per datasheet Section 6.3.1. This extended industrial grade enables deployment in automotive cabin modules, outdoor utility meters, and factory-floor controllers without derating.

Can the internal 16 MHz RC oscillator be used as the system clock source without calibration?

Yes. The HSI (High-Speed Internal) RC oscillator is factory-trimmed to ±1% accuracy at 16 MHz and can serve as the main system clock without external crystal or runtime calibration - ideal for cost-sensitive designs where USB is not required or uses its dedicated PLL path.

How many external interrupt lines does STM32L152C6U6A support in Stop mode?

The STM32L152C6U6A supports 16 external interrupt lines capable of waking the device from Stop mode, confirmed in datasheet Section 3.1 and Table 5. These map to GPIO pins across all ports (PA–PC) and include dedicated EXTI lines for precise low-power event handling.