STMicroelectronics STM8L151F3U6TR

Overview

STM8L151F3U6TR from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 8 KB Flash, 256 bytes data EEPROM, RTC, 12-bit ADC (1 Msps), two ultra-low-power comparators, and multiple timers-including two 16-bit general-purpose timers and one 8-bit basic timer-in a 20-pin UFQFPN (3×3 mm) package. It operates from 1.65–3.6 V and supports -40 to +85 °C industrial temperature range, targeting battery-powered sensor nodes and portable medical devices.

For engineers reviewing the STM8L151F3U6TR datasheet, STM8L151F3U6TR pinout, STM8L151F3U6TR application, or STM8L151F3U6TR equivalent, key selection criteria include ultra-low-power operation across five sleep modes (Halt current <300 nA), fast 5 µs wake-up time, integrated capacitive touch sensing (up to 20 channels), and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L151F3U6TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz max CPU frequency. Its clock system integrates dual oscillators (1–16 MHz HSE and 32 kHz LSE), factory-trimmed 16 MHz RC, and 38 kHz low-consumption RC, all managed by a clock security system to detect oscillator failure.

Power management includes five configurable low-power modes-Wait, Low-power Run, Low-power Wait, Active-halt with RTC, and Halt-with BOR reset thresholds selectable across five levels and programmable voltage detector (PVD). The RTC provides BCD calendar, alarm interrupt, digital calibration (±0.5 ppm), and auto-wakeup capability.

Key Specifications

Pinout & Package

STM8L151F3U6TR is housed in a 20-pin Ultra Thin Fine Pitch Quad Flat No-lead (UFQFPN20) package measuring 3×3 mm with 0.5 mm pitch, designed for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L051F3P6, STM8L151F3U6TR adds RTC, DMA, and higher ADC speed-critical for time-aware sensing. Versus STM32L011K4U6, it offers lower interrupt latency and simpler firmware but lacks 32-bit compute headroom for complex signal processing.

Availability

STM8L151F3U6TR is available at Aetrix Electronics and suitable for smart utility metering, wearable health monitors, industrial wireless sensor nodes, and portable diagnostic tools requiring stable component supply across extended product lifecycles.

Supply support for STM8L151F3U6TR 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 analog products for industrial, automotive, and consumer markets.

The STM8L ultra-low-power MCU family targets battery-operated and energy-harvesting applications where sub-µA sleep currents, fast wake-up, and integrated peripherals reduce system-level BOM count and power consumption.

FAQ

What is the maximum operating frequency and corresponding power supply range for STM8L151F3U6TR?

The STM8L151F3U6TR achieves a maximum CPU frequency of 16 MHz within a supply voltage range of 1.8–3.6 V when Brown-Out Reset (BOR) is enabled. With BOR disabled, operation is supported down to 1.65 V, though 16 MHz operation is only guaranteed above 1.8 V per electrical characteristics tables in DS7204 Rev 11.

Does STM8L151F3U6TR support capacitive touch sensing, and how many channels are available?

Yes, STM8L151F3U6TR integrates a hardware capacitive sensing controller supporting up to 20 channels. It natively handles touchkey, proximity, linear, and rotary touch configurations without external components, using dedicated charge-transfer measurement circuitry and built-in noise filtering algorithms.

What debug interface does STM8L151F3U6TR use, and what pins are required?

STM8L151F3U6TR uses the Single-Wire Interface Module (SWIM) for on-chip programming and non-intrusive debugging. Only one dedicated pin (SWIM) plus VDD and VSS are required-no additional debug header or clock lines needed-enabling minimal footprint debugging in space-constrained designs.

Is there a factory-programmed unique identifier, and how is it accessed?

Yes, STM8L151F3U6TR includes a 96-bit unique ID programmed during wafer test and stored in read-only registers at addresses 0x4865–0x486A. It is accessible via standard memory-mapped reads in application firmware and used for device authentication, secure boot, or license binding without requiring external EEPROM.