STMicroelectronics STM8S105K6T6C

Overview

STM8S105K6T6C from STMicroelectronics is an 8-bit access-line microcontroller featuring a 16 MHz STM8 core, 32 Kbyte Flash memory with 20-year data retention at 55 °C, 1 Kbyte true data EEPROM (300 kcycle endurance), and integrated 10-bit ADC with up to 10 channels. It supports UART, SPI, and I²C interfaces and targets cost-sensitive industrial control, appliance motor management, and sensor interface applications.

For engineers reviewing the STM8S105K6T6C datasheet, STM8S105K6T6C pinout, STM8S105K6T6C application, or STM8S105K6T6C equivalent, key selection criteria include Flash/EEPROM endurance specs, LQFP48 package compatibility, 16 MHz max clock with internal RC trimmability, and support for low-power active-halt mode with peripheral clock gating.

Technical Context

The STM8S105K6T6C implements a Harvard-architecture 8-bit core with 3-stage pipeline and extended instruction set, enabling deterministic real-time execution. Its clock system integrates four independent sources: user-trimmable 16 MHz RC, 128 kHz low-power RC, crystal oscillator, and external clock input - all monitored by a clock security system.

Interrupt handling uses a nested controller supporting 32 vectors and up to 37 external interrupts across six priority levels. Memory subsystem includes separate Flash (program), true data EEPROM (nonvolatile storage), and RAM (2 Kbyte), with dedicated SWIM debug interface and 96-bit unique ID per device.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 48 leads; pin-compatible with STM8S105C6T6 and STM8S105S6T6 variants in same footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S003F3P6, the STM8S105K6T6C delivers 4× more Flash and integrated EEPROM for autonomous configuration - essential for field-upgradable appliances. Versus STM8L151K4T6, it trades lower power for higher performance and richer peripherals, making it optimal for mains-powered industrial nodes requiring real-time motor control.

Availability

STM8S105K6T6C is available at Aetrix Electronics and suitable for industrial motor control, home appliance interface, and smart metering applications requiring stable component supply across multi-year production cycles.

Supply support for STM8S105K6T6C 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM8S series targets cost-optimized 8-bit control applications with emphasis on Flash reliability, low-voltage operation, and integrated peripherals - specifically engineered for appliance, industrial automation, and building control systems.

FAQ

What is the maximum operating frequency and supported voltage range for STM8S105K6T6C?

The STM8S105K6T6C operates at up to 16 MHz with a supply voltage range of 2.95 V to 5.5 V. This dual-voltage compatibility allows direct integration into both 3.3 V and 5 V legacy systems without level-shifting. The internal 16 MHz RC oscillator can be trimmed to maintain timing accuracy across temperature and voltage variations.

Does STM8S105K6T6C include hardware debug support, and what interface is used?

Yes, it features a Single-Wire Interface Module (SWIM) for non-intrusive in-circuit debugging and programming using only one dedicated pin. SWIM supports full breakpoint, step-through, and memory inspection capabilities without requiring additional debug headers or pins - reducing PCB complexity and BOM cost compared to SWD or JTAG solutions.

How many I/O pins does STM8S105K6T6C provide, and what are their drive capabilities?

The LQFP48 package offers up to 38 I/O pins, including 16 high-sink outputs capable of 20 mA each. These pins support standard push-pull, open-drain, and high-current sink configurations. I/Os are designed for robustness against current injection and meet industrial EMC requirements per IEC 61000-4-2/4-4.

Is there built-in nonvolatile memory beyond Flash, and what is its endurance specification?

Yes, it integrates 1 Kbyte of true data EEPROM with guaranteed 300,000 write/erase cycles and 20-year data retention at 55 °C. Unlike Flash-based emulation, this EEPROM supports byte-level writes and retains data independently of program memory - ideal for logging operational parameters or storing calibration coefficients in field-deployed equipment.