STMicroelectronics STM8L151F2P6TR

Overview

STM8L151F2P6TR from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 4 KB Flash, 128 bytes data EEPROM, RTC, 12-bit ADC (up to 1 Msps), two ultra-low-power comparators, and integrated capacitive touch sensing-designed for battery-powered sensor nodes in industrial monitoring and smart metering systems.

For engineers reviewing the STM8L151F2P6TR datasheet, STM8L151F2P6TR pinout, STM8L151F2P6TR application, or STM8L151F2P6TR equivalent, key selection criteria include active-halt mode current (300 nA @ 3 V), 5 µs wakeup from Halt, 1.65–3.6 V operating range, and TSSOP20 package compatibility with space-constrained PCB layouts.

Technical Context

The STM8L151F2P6TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz max frequency and supporting up to 40 external interrupt sources. Its clock system integrates dual RC oscillators (16 MHz factory-trimmed HSI, 38 kHz LSI) plus 32 kHz and 1–16 MHz crystal support with clock security system.

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

Key Specifications

Pinout & Package

STM8L151F2P6TR uses the TSSOP20 (6.4 × 4.4 mm, 0.65 mm pitch) package with 18 general-purpose I/Os, all mappable to interrupt vectors, plus dedicated pins for reset, SWIM debug, and multiple clock sources.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L051F3P6, the STM8L151F2P6TR adds RTC, touch sensing, and higher ADC resolution-critical for time-stamped sensor logging. Versus STM32L011D4P6, it offers wider voltage range and lower Halt current, enabling true single-cell operation where 32-bit performance isn't required.

Availability

STM8L151F2P6TR is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, industrial HMIs, and portable medical devices requiring stable component supply across long-lifecycle deployments.

Supply support for STM8L151F2P6TR 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.

The STM8L ultra-low-power MCU family targets battery-operated and energy-harvesting applications demanding sub-µA sleep currents, fast wakeup, and integrated analog peripherals-optimized for longevity and reliability in harsh environments.

FAQ

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

The STM8L151F2P6TR achieves a maximum CPU frequency of 16 MHz across its full operating voltage range of 1.65–3.6 V (without BOR) or 1.8–3.6 V (with BOR enabled). At 16 MHz and 3.0 V, typical active-mode current is 190 µA/MHz, verified per DS7204 Rev 11 Table 19.

Does this MCU support in-system programming and debugging?

Yes-STM8L151F2P6TR features SWIM (Single-Wire Interface Module), enabling non-intrusive on-chip programming and real-time debugging using only the SWIM pin and ground. No external debugger hardware is required beyond a standard SWIM programmer interface.

How many I/O pins support capacitive touch sensing, and what is the implementation method?

Up to 20 I/O pins support capacitive sensing, implemented via the integrated Touch Sensing Controller (TSC) hardware block. It uses charge-transfer measurement with built-in acquisition logic, eliminating need for external RC networks or dedicated ADC channels-verified in Section 3.11 of DS7204.

What RTC accuracy can be expected, and how is calibration performed?

The RTC achieves ±0.5 ppm accuracy over temperature and voltage when calibrated digitally using the internal 38 kHz LSI oscillator and LSE crystal reference. Calibration is performed once during manufacturing and stored in option bytes-detailed in Section 3.5 and Table 31 of the datasheet.