STMicroelectronics STM8L152M8T3

Overview

STM8L152M8T3 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 64 KB Flash, 2 KB data EEPROM, integrated RTC with ±0.5 ppm accuracy, 12-bit ADC (1 Msps, 28 channels), dual 12-bit DACs, LCD controller (8×40), and 67 GPIOs in LQFP80 package. It operates from 1.65–3.6 V across –40 to +85 °C and targets battery-powered metering, portable medical devices, and industrial sensor nodes requiring long runtime and precise timing.

For engineers reviewing the STM8L152M8T3 datasheet, STM8L152M8T3 pinout, STM8L152M8T3 application, or STM8L152M8T3 equivalent, key selection criteria include ultra-low-power mode current (400 nA Halt, 1.4 µA Active-Halt), LCD support, dual DAC output buffering, 96-bit unique ID, and SWIM-based non-intrusive debugging capability.

Technical Context

The STM8L152M8T3 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates three oscillators: 32 kHz LSE for RTC, 1–16 MHz HSE, and factory-trimmed 16 MHz HSI with 38 kHz LSI for low-power wake-up.

Power management includes five configurable low-power modes, programmable BOR thresholds, and ultra-low leakage I/O (50 nA). The RTC supports BCD calendar, alarm interrupt, digital calibration, and anti-tamper detection - all functional in Active-Halt mode with full RAM retention.

Key Specifications

Pinout & Package

LQFP80 (14 × 14 mm, 0.5 mm pitch) package with 67 user-configurable I/Os, all mappable to interrupt vectors. Includes dedicated LCD segment/common pins, multiple USART/I²C/SPI interfaces, and dual DAC outputs on PB4–PB6.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power 8-bit microcontroller applications.

Compared with STM8L151M8T3, the STM8L152M8T3 adds LCD support and dual DACs at identical power and pin compatibility; versus STM32L053R8T6, it offers lower system-level power in LCD-centric designs but less processing headroom for advanced connectivity.

Availability

STM8L152M8T3 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, and industrial wireless sensor nodes requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across temperature and voltage ranges.

Supply support for STM8L152M8T3 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 STM8L ultra-low-power 8-bit MCU family targets battery-operated and energy-harvesting applications where nanowatt-level sleep currents, integrated peripherals (RTC, LCD, DAC), and robust security features are critical design requirements.

FAQ

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

The STM8L152M8T3 achieves 16 MHz maximum clock frequency with 200 µA/MHz + 330 µA total current consumption at VDD = 3.3 V and 25 °C. This includes core, peripheral, and I/O domains. Measured values scale linearly with frequency and decrease at lower VDD (e.g., 130 µA/MHz at 1.8 V), enabling dynamic voltage/frequency scaling for optimal energy efficiency.

Does the device support true hardware LCD bias generation without external components?

Yes - the integrated LCD controller includes a programmable step-up converter that generates required bias voltages (VLCD) from VDD, supporting 8×40 or 4×44 segment displays directly. No external charge pump or resistor divider network is needed, reducing BOM count and PCB area in portable instrumentation designs.

How many capacitive sensing channels does the STM8L152M8T3 support, and what sensing methods are enabled?

The device supports up to 16 capacitive sensing channels using its built-in CS (Capacitive Sensing) hardware block. It natively implements touchkey, proximity, linear touch, and rotary touch sensing algorithms in firmware, eliminating need for external touch controllers. All CS channels map to standard GPIOs and operate concurrently with other peripherals.

Is the 96-bit unique ID accessible during normal operation, and how is it used in secure applications?

The 96-bit unique ID is stored in read-only registers (UID[0:2]) and accessible via standard memory-mapped reads at boot or runtime. It serves as immutable device identity for secure key derivation, firmware binding, and cloud-based device authentication - critical for anti-cloning in metering and medical IoT deployments where regulatory compliance mandates hardware-rooted trust.