STMicroelectronics STM32L152C8T6A

Overview

STM32L152C8T6A 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, integrated 12-bit ADC (1 Msps, 24 channels), and dual 12-bit DACs with output buffers. It operates from 1.65 V to 3.6 V across –40°C to +105°C and supports USB 2.0, three USARTs, two SPIs, two I²Cs, and up to 83 fast I/Os - deployed in battery-powered medical sensors and portable industrial data loggers.

For engineers reviewing the STM32L152C8T6A datasheet, STM32L152C8T6A pinout, STM32L152C8T6A application, or STM32L152C8T6A equivalent, key selection criteria include standby current (0.28 µA), RTC-enabled Stop mode (1.38 µA), 10.9 µA Low-power Run mode, 7-channel DMA support, and LCD driver capability (excluded in C8 variant per datasheet Table 1).

Technical Context

The STM32L152C8T6A implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run, Stop, Standby) with sub-µA retention states. Its Cortex-M3 core runs at up to 32 MHz with 1.25 DMIPS/MHz and includes a memory protection unit (MPU) for secure embedded execution.

Clock architecture integrates five 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 USB PLL generating 48 MHz. Analog subsystem includes two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, and VREFINT reference.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), 48-pin quad flat lead frame with exposed thermal pad - suitable for compact, cost-sensitive PCB layouts requiring reflow compatibility and thermal reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L152C8T6A, STM32L432KCU6 trades EEPROM and USB for FPU and nanoamp standby, while STM32L072CZT6 reduces performance and analog capability to shrink footprint and cost - both require redesign of EEPROM-dependent logic and USB interface layers.

Availability

STM32L152C8T6A is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable gas detectors requiring stable component supply across extended product lifecycles.

Supply support for STM32L152C8T6A 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32L1 series targets ultra-low-power embedded applications demanding long battery life, robust analog integration, and industrial-grade temperature range - optimized for sensor hubs, portable instrumentation, and energy-harvesting systems.

FAQ

Does STM32L152C8T6A include an integrated LCD controller?

No. Per ST's official datasheet (DocID024330 Rev 5, Section 3.9 and Table 1), the LCD driver is excluded in STM32L151x6/8/B-A and STM32L152x6/8/B-A "C" variants (e.g., C8). Only "B" and "CB" packages include the LCD controller supporting up to 8×40 segments.

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32L152C8T6A runs at up to 32 MHz. At 32 MHz with code executing from Flash, typical current consumption is 185 µA/MHz (5.92 mA total), as specified in Table 18 of the datasheet under VDD = 3.3 V and TA = 25°C.

How many I/O pins support 5 V tolerance, and which banks are they in?

73 of the 83 I/Os are 5 V tolerant. These are located in GPIO ports A, B, C, and D - specifically all pins except those in the VDDIO2-supplied bank (e.g., certain PD pins), as confirmed in Section 3.6 and Table 43 of the datasheet.

Is the internal 16 MHz RC oscillator factory-trimmed, and what is its accuracy?

Yes. The HSI (High-Speed Internal) RC oscillator is factory-trimmed to ±1% accuracy at 25°C and 3.3 V, as stated in Section 3.4 and Table 31 of the datasheet. Calibration registers allow runtime adjustment for improved stability across voltage and temperature.