STMicroelectronics STM8L151M8T6

Overview

STM8L151M8T6 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 64 KB Flash, 2 KB data EEPROM, RTC, LCD controller, 12-bit ADC (1 Msps, 28 channels), dual 12-bit DACs, and three USARTs. It operates from 1.65–3.6 V across –40 to +85 °C and targets battery-powered metering, portable medical devices, and smart sensors requiring sub-µA sleep current.

For engineers reviewing the STM8L151M8T6 datasheet, STM8L151M8T6 pinout, STM8L151M8T6 application, or STM8L151M8T6 equivalent, key selection criteria include active-halt mode current (1.4 µA with full RTC), fast wake-up time (4.7 µs), 67 GPIOs with capacitive sensing support, and integrated LCD driver for 8×40 segments - all critical for energy-constrained embedded designs.

Technical Context

The STM8L151M8T6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates dual crystal oscillators (32 kHz LSE + 1–16 MHz HSE), factory-trimmed 16 MHz RC, and clock security system for fail-safe operation.

Power management includes five low-power modes: Wait (5.9 µA), Low-power Wait (3 µA), Active-halt (1.4 µA with RTC), and Halt (400 nA). The ultra-low-leakage I/O (50 nA per pin) and programmable BOR with five thresholds enable robust operation in wide-voltage battery systems.

Key Specifications

Pinout & Package

LQFP80 (14 × 14 mm, 0.65 mm pitch) package with 80 pins; RoHS-compliant, industrial-grade thermal performance (θ_JA = 36 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152M8T6, the STM8L151M8T6 removes redundant LCD hardware to reduce die size and cost, while matching all low-power metrics and analog features. Against STM32L053R8T6, it trades 32-bit flexibility for superior integration of LCD, touch, and ultra-low-leakage I/O - making it optimal for deeply embedded, display-rich sensor endpoints.

Availability

STM8L151M8T6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, and industrial wireless sensor nodes requiring stable component supply throughout extended product lifecycles.

Supply support for STM8L151M8T6 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 MCU family targets battery-operated applications demanding sub-microamp sleep currents, integrated analog peripherals, and long-term reliability - with design emphasis on metering, healthcare, and IoT edge nodes.

FAQ

What is the maximum operating frequency and corresponding power consumption of the STM8L151M8T6?

The STM8L151M8T6 achieves a maximum clock frequency of 16 MHz with a typical active-mode current of 200 µA/MHz plus 330 µA base consumption. At 16 MHz and 3.0 V, total current is approximately 3.53 mA. This balance enables real-time control tasks while preserving ultra-low-power architecture integrity.

Does the STM8L151M8T6 support hardware-based capacitive touch sensing?

Yes - it integrates a dedicated capacitive sensing controller supporting up to 16 channels. It natively handles touchkey, proximity, linear slider, and rotary touch detection with automatic baseline compensation and noise filtering, eliminating need for external touch ICs or software-intensive polling algorithms.

Can the STM8L151M8T6 drive an LCD without external components?

Yes - its integrated LCD controller supports up to 8×40 segments and includes an internal step-up converter. When powered from a single 3 V supply, it generates the required bias voltages internally, enabling direct connection to passive segment LCDs without external charge pumps or voltage dividers.

What debug interface does the STM8L151M8T6 use, and is SWD supported?

The STM8L151M8T6 uses ST's Single-Wire Interface Module (SWIM) for programming and debugging via one dedicated pin. It does not support SWD or JTAG; SWIM provides full non-intrusive debug access including breakpoints, register inspection, and flash programming at run-time without halting peripherals.