STMicroelectronics STM8L151C8T3TR

Overview

STM8L151C8T3TR 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 two ultra-low-power comparators. 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 STM8L151C8T3TR datasheet, STM8L151C8T3TR pinout, STM8L151C8T3TR application, or STM8L151C8T3TR equivalent, key selection criteria include active-halt mode current (1.4 µA with full RTC), fast wake-up time (4.7 µs), capacitive touch support (16 channels), and SWIM-based non-intrusive debugging.

Technical Context

The STM8L151C8T3TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates three oscillators: 32 kHz LSE for RTC, 1–16 MHz HSE, and factory-trimmed 16 MHz HSI with ±1% accuracy over temperature and voltage.

Power management includes five low-power modes-Halt (400 nA), Active-halt (1.4 µA with RTC), Low-power wait (3 µA), Low-power run (5.9 µA), and Wait-with BOR thresholds programmable in five steps and ultra-low I/O leakage (50 nA per pin).

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 44 general-purpose I/Os, all mappable to interrupt vectors. Includes dedicated pins for RTC crystal (OSC32_IN/OSC32_OUT), HSE (OSC_IN/OSC_OUT), SWIM debug interface (PA1), and LCD segment/common drivers (PB0–PB7, PC0–PC7, PD0–PD7).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152C8T3TR, the STM8L151C8T3TR saves 0.8 mA in LCD-active scenarios and reduces BOM cost; versus STM32L011K4T6, it delivers superior µA/MHz efficiency and hardware touch acceleration at the expense of 32-bit ecosystem maturity.

Availability

STM8L151C8T3TR is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, and industrial wireless sensor nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for STM8L151C8T3TR 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 family targets battery-operated and energy-harvested applications where sub-µA sleep current, RTC accuracy, and integrated analog peripherals reduce system complexity and extend operational lifetime.

FAQ

What is the maximum operating frequency and corresponding power consumption of the STM8L151C8T3TR?

The device runs at up to 16 MHz with a typical active 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 value scales linearly with frequency and is validated across the full 1.65–3.6 V supply range per datasheet Table 20.

Does the STM8L151C8T3TR support hardware-accelerated capacitive touch sensing?

Yes-it integrates a dedicated touch sensing controller supporting up to 16 channels with hardware scan, noise filtering, and baseline auto-refresh. It enables touchkey, proximity, linear, and rotary touch without CPU overhead, as confirmed in Section 3.13 and Table 2 of DS6948 Rev 11.

Can the STM8L151C8T3TR drive an LCD display directly?

No-the STM8L151C8T3TR does not include an LCD controller. That feature is exclusive to the STM8L152x6/8 series. The '151 variant lacks LCD segment/common drivers and step-up converter; use STM8L152C8T3TR for LCD applications.

What debug interface does the STM8L151C8T3TR use, and what pins are required?

It uses the SWIM (Single-Wire Interface Module) debug interface, requiring only PA1 (SWIM) and NRST pins. No additional debug headers or clock lines are needed. SWIM supports full-speed programming, real-time variable inspection, and non-intrusive breakpoints as specified in Section 3.19 and Figure 25 of the datasheet.