STMicroelectronics STM8S105S6T6C

Overview

STM8S105S6T6C from STMicroelectronics is an 8-bit access-line microcontroller featuring a 16 MHz STM8 core, 32 Kbyte Flash program memory, 1 Kbyte true data EEPROM (300 kcycle endurance), 2 Kbyte RAM, and integrated 10-bit ADC with 10-channel multiplexing - deployed in industrial control panels for real-time sensor data acquisition and local actuator sequencing.

For engineers reviewing the STM8S105S6T6C datasheet, STM8S105S6T6C pinout, STM8S105S6T6C application, or STM8S105S6T6C equivalent, key selection considerations include its LQFP48 package compatibility, dual watchdog timers (window + independent), SWIM single-wire debug interface, and support for LIN master mode over UART2 - critical for cost-sensitive automotive body electronics and appliance MCU upgrades.

Technical Context

The STM8S105S6T6C implements a Harvard-architecture STM8 core with 3-stage pipeline and extended instruction set, enabling deterministic 16 MHz execution without external wait states. Its clock system integrates four sources: user-trimmable 16 MHz RC, low-power 128 kHz RC, crystal resonator oscillator, and external clock input - all monitored by a dedicated clock security system.

Interrupt handling uses a nested controller supporting 32 vectors and up to 37 external interrupts across six priority levels. Peripheral integration includes TIM1 (16-bit advanced timer with dead-time insertion and 3 complementary outputs), two general-purpose 16-bit timers (TIM2/TIM3), and an 8-bit basic timer (TIM4) - enabling precise motor phase control and PWM-driven LED dimming in a single chip.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature range (−40 to +85 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S105S6T6C, STM8S003F3P6 trades memory and EEPROM for lower cost and smaller footprint, while STM8L151K4T6 sacrifices LIN and high-drive I/Os to achieve 100× lower standby current - making each alternative optimal only within narrowly defined power, feature, or cost boundaries.

Availability

STM8S105S6T6C is available at Aetrix Electronics and suitable for industrial HMI panels, automotive body control modules, and smart appliance control boards requiring stable component supply and long-term manufacturing continuity.

Supply support for STM8S105S6T6C 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 devices for industrial, automotive, and consumer markets.

The STM8S series targets cost-sensitive embedded applications demanding robustness, integrated peripherals, and toolchain maturity - specifically engineered for industrial automation, appliance control, and automotive body electronics where reliability and long-term supply stability are mandatory.

FAQ

What debug interface does STM8S105S6T6C support?

The STM8S105S6T6C uses the Single Wire Interface Module (SWIM) for debugging and programming. It requires only one physical pin (SWIM) and supports full in-circuit debugging, flash programming, and memory inspection via ST-LINK/V2 or compatible debuggers - eliminating the need for multi-pin JTAG headers and reducing PCB routing complexity.

Does STM8S105S6T6C support LIN communication natively?

Yes, STM8S105S6T6C supports LIN 2.2 master mode through UART2, with built-in hardware support for LIN break field generation, sync field handling, and identifier filtering. No external LIN transceiver is required for basic master functionality, though a physical layer transceiver (e.g., TLE7259-3GE) is needed for bus connection.

What is the maximum operating temperature range for this device?

The STM8S105S6T6C is qualified for industrial temperature range: −40 °C to +85 °C. This rating is validated per ST's qualification standards (AEC-Q100 not applicable, as it is not automotive-grade), and applies to all LQFP48-packaged units shipped under standard industrial specifications.

Can the internal 16 MHz RC oscillator be calibrated for improved accuracy?

Yes, the internal 16 MHz RC oscillator is user-trimmable via the CLK_HSICALR register. Calibration is performed using an external reference clock or known-frequency signal applied to the CLK_CCO pin, allowing adjustment in 0.5% steps across a ±5% range - achieving typical accuracy of ±1% after calibration at room temperature.