STMicroelectronics STM8L151M8T6TR

Overview

STM8L151M8T6TR from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 64 KB Flash, 2 KB data EEPROM, RTC, LCD controller, dual 12-bit DACs, 12-bit ADC (1 Msps, 28 channels), 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 and fast wake-up.

For engineers reviewing the STM8L151M8T6TR datasheet, STM8L151M8T6TR pinout, STM8L151M8T6TR application, or STM8L151M8T6TR equivalent, key selection criteria include active-halt mode current (1.4 µA with full RTC), 4.7 µs wake-up time from Halt, 67 I/Os with interrupt mapping, and integrated capacitive touch sensing (16 channels).

Technical Context

The STM8L151M8T6TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. It integrates a clock security system, programmable voltage detector (PVD), and five low-power modes-including Active-halt with BCD calendar RTC and digital calibration (±0.5 ppm).

Its analog subsystem includes two rail-to-rail ultra-low-power comparators (one with fixed threshold), dual buffered 12-bit DACs, and a 12-bit ADC with internal reference and temperature sensor. The DMA controller supports 4 channels for peripheral-to-peripheral transfers including ADC, DAC, SPI, I2C, USART, and timers.

Key Specifications

Pinout & Package

LQFP80 (14 × 14 mm, 0.5 mm pitch) package with 80 pins. Pin functions validated per STMicroelectronics DS6948 Rev 11 Figure 3 (STM8L151M8 80-pin pinout without LCD).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152M8T6TR, the STM8L151M8T6TR saves pin resources and firmware complexity where LCD is unused; versus STM32L053R8T6, it delivers lower system-level BOM cost and simpler firmware for basic sensing/control tasks without 32-bit compute demands.

Availability

STM8L151M8T6TR is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, and industrial wireless sensor nodes requiring stable component supply and long-term lifecycle assurance.

Supply support for STM8L151M8T6TR 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 ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM8L ultra-low-power MCU product line targets battery-operated and energy-harvesting applications demanding sub-microamp sleep currents, fast wake-up, and integrated peripherals like RTC, LCD, and capacitive touch-without sacrificing code efficiency or toolchain maturity.

FAQ

What is the maximum operating frequency and core performance of the STM8L151M8T6TR?

The STM8L151M8T6TR runs at up to 16 MHz using its Harvard-architecture STM8 core, achieving 16 CISC MIPS peak performance. Its 3-stage pipeline and optimized instruction set deliver efficient code density and deterministic timing-critical for real-time sensor polling and control loops in ultra-low-power systems.

Does the STM8L151M8T6TR support hardware-accelerated capacitive touch sensing?

Yes-it integrates a dedicated capacitive sensing controller supporting up to 16 channels with hardware-accelerated acquisition, noise filtering, and baseline tracking. It enables robust touchkey, proximity, linear slider, and rotary encoder implementations without CPU intervention during measurement cycles.

How does the RTC maintain accuracy in ultra-low-power modes?

The RTC uses a 32 kHz external crystal (LSE) with digital calibration achieving ±0.5 ppm accuracy over temperature. In Active-halt mode (1.4 µA), it maintains full BCD calendar, alarm, and tamper detection-enabling decade-scale timekeeping on coin-cell batteries without external compensation.

What debug and programming interfaces are supported?

The device supports SWIM (Single-Wire Interface Module) for non-intrusive on-chip debugging and flash programming, plus UART-based bootloader for field firmware updates. SWIM requires only one dedicated pin and works across all power modes, including low-power run and wait.