STMicroelectronics STM32L152C8U6A

Overview

STM32L152C8U6A 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 instrumentation, and smart utility meters requiring sub-µA standby operation.

For engineers reviewing the STM32L152C8U6A datasheet, STM32L152C8U6A pinout, STM32L152C8U6A application, or STM32L152C8U6A equivalent, key selection criteria include verified ultra-low-power mode current (0.28 µA Standby), USB 2.0 full-speed interface with internal 48 MHz PLL, LCD driver support (8×40 segments), and capacitive touch sensing capability up to 20 channels.

Technical Context

The device integrates a Cortex-M3 core running at up to 32 MHz with MPU, dynamic voltage scaling, and five low-power modes (Run, Sleep, Low-power Run, Stop, Standby) optimized for energy-constrained applications. It supports multiple clock sources including HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), and MSI (65 kHz–4.2 MHz).

Analog subsystem includes two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, VREFINT reference, and hardware-accelerated CRC unit. Communication peripherals comprise 1× USB 2.0, 3× USART (with IrDA/ISO 7816), 2× SPI (16 Mbit/s), and 2× I²C (SMBus/PMBus).

Key Specifications

Pinout & Package

STM32L152C8U6A is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch) with exposed thermal pad, supporting high-density PCB layouts and efficient heat dissipation 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 STM32L152C8U6A, STM32L432KCU6 offers higher compute throughput and deeper sleep but omits EEPROM and LCD - making it ideal for algorithm-heavy, display-free nodes. EFM32PG12B500F1024GL125 achieves nanowatt-level deep sleep yet requires external USB and display ICs, increasing BOM complexity and cost.

Availability

STM32L152C8U6A is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable handheld testers requiring stable component supply across multi-year production cycles.

Supply support for STM32L152C8U6A 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-grade components since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust memory integrity, and integrated analog peripherals - specifically engineered for IoT edge nodes, portable medical devices, and energy metering systems.

FAQ

Does STM32L152C8U6A support USB device mode without external crystal?

Yes. The part integrates an internal 48 MHz PLL fed by the HSI RC oscillator, enabling full-speed USB 2.0 device operation without requiring an external 48 MHz crystal. This reduces BOM cost and PCB footprint while maintaining USB compliance under specified voltage and temperature conditions.

What is the maximum operating temperature range for industrial use?

The STM32L152C8U6A is qualified for operation from –40°C to +105°C ambient temperature, meeting industrial-grade reliability requirements. Its ultra-low-power design maintains stable current consumption across this range, with validated performance in Stop and Standby modes at maximum junction temperature.

How does the integrated EEPROM differ from standard Flash memory?

The 4 KB true EEPROM supports byte-level erase/write operations with 100,000 write/erase cycles and 40-year data retention at 85°C - unlike Flash, which requires sector erasure and has lower endurance. Both memories include hardware ECC to prevent bit errors during read/write sequences.

Can the capacitive touch sensing feature operate during low-power modes?

Yes. The CTSU peripheral remains active in Low-power Run and Stop modes, allowing continuous touch detection with typical current draw of 1.5 µA. Wake-up events from touch activity can trigger transition to Run mode within <8 µs, enabling responsive UI with minimal power penalty.