STMicroelectronics STM8L151C6T3TR

Overview

STM8L151C6T3TR from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 32 KB Flash, 1 KB data EEPROM with ECC, 2 KB RAM, 12-bit ADC (1 Msps, 25 channels), 12-bit DAC, two ultra-low-power comparators, RTC with BCD calendar and auto-wakeup, and integrated capacitive touch sensing (up to 16 channels). It operates from 1.65 V to 3.6 V across –40 °C to +85 °C and targets battery-powered IoT sensors and portable medical devices.

For engineers reviewing the STM8L151C6T3TR datasheet, STM8L151C6T3TR pinout, STM8L151C6T3TR application, or STM8L151C6T3TR equivalent, key selection criteria include active-halt current (1.3 µA), Halt-mode wakeup time (4.7 µs), RTC accuracy with external 32 kHz crystal, 41 GPIOs with interrupt mapping, and SWIM-based non-intrusive debugging support.

Technical Context

The STM8L151C6T3TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. It integrates dual clock domains: high-speed (1–16 MHz HSE or 16 MHz factory-trimmed RC) and low-speed (32 kHz LSE or 38 kHz RC), managed by a clock security system with fail-safe detection.

Its power architecture supports five distinct low-power modes-Wait, Low Power Run (5.1 µA), Low Power Wait (3 µA), Active-Halt with full RTC (1.3 µA), and Halt (350 nA)-with per-I/O leakage limited to 50 nA and fast wake-up from Halt in 4.7 µs. The device includes a dedicated DMA controller with 4 peripheral channels and 1 memory-to-memory channel.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK®2 certified. Pin count: 48 leads with 41 user-configurable I/Os, all mappable to interrupt vectors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L052C6T3, the STM8L151C6T3TR adds RTC, DAC, and double Flash capacity for time-stamped data logging and analog actuation; versus STM32L053R8T6, it trades 32-bit performance for lower gate count, simpler toolchain, and native capacitive touch integration.

Availability

STM8L151C6T3TR is available at Aetrix Electronics and suitable for smart utility metering, portable medical monitors, industrial wireless sensor nodes, and home appliance control panels requiring stable component supply and long-term lifecycle assurance.

Supply support for STM8L151C6T3TR 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 product line targets energy-constrained applications such as battery-operated sensors, wearable health devices, and smart meters-prioritizing sub-µA sleep currents, integrated analog peripherals, and robust development tooling.

FAQ

What is the minimum operating voltage for STM8L151C6T3TR in Halt mode?

The STM8L151C6T3TR supports Halt mode operation down to 1.65 V, with typical current consumption of 350 nA at 3.0 V and –40 °C to +85 °C. Below 1.65 V, the device enters power-down state and retains RAM contents only if VDD remains above the brown-out reset threshold (configurable from 1.62 V to 2.52 V).

Does STM8L151C6T3TR support capacitive touch sensing on all GPIOs?

No. Capacitive touch sensing is supported on up to 16 dedicated channels mapped to specific pins: PA0–PA7, PB0–PB3, PC0–PC3, and PD0–PD3. These pins feature built-in charge transfer circuitry and hardware-accelerated CTSU logic; other GPIOs lack this analog front-end capability.

Can the 12-bit DAC output drive an external load directly?

Yes-the integrated 12-bit DAC includes an output buffer capable of sourcing/sinking ±2 mA at VDD = 3.3 V. It can directly drive low-impedance loads such as op-amp inputs, LED bias circuits, or small transducers, but requires external filtering for clean analog waveform generation.

Is SWIM debugging compatible with production firmware lock settings?

SWIM remains functional even when read-out protection (ROP) Level 1 is enabled, allowing full debugging and programming access. However, ROP Level 2 permanently disables SWIM and erases debug access-this setting is irreversible and must be applied only after final firmware validation.