STMicroelectronics STM8S105K6T6CTR

Overview

STM8S105K6T6CTR from STMicroelectronics is an 8-bit access-line microcontroller featuring a 16 MHz STM8 core, 32 Kbyte Flash with 20-year data retention at 55 °C, 1 Kbyte true EEPROM (300 kcycle endurance), 10-bit ADC with up to 10 channels, and integrated UART, SPI, and I²C interfaces. It targets cost-sensitive industrial control, appliance motor management, and sensor interface applications requiring robust I/O and low-power operation.

For engineers reviewing the STM8S105K6T6CTR datasheet, STM8S105K6T6CTR pinout, STM8S105K6T6CTR application, or STM8S105K6T6CTR equivalent, key selection factors include its LQFP48 package with 38 I/Os (16 high-sink), nested interrupt controller supporting 32 interrupts, flexible clock sources (16 MHz RC, crystal, external), and dual watchdog timers for safety-critical firmware execution.

Technical Context

The STM8S105K6T6CTR implements a Harvard-architecture 8-bit core with 3-stage pipeline and extended instruction set, enabling efficient code density and deterministic timing. Its memory subsystem integrates program Flash, true data EEPROM, and RAM with independent access paths and hardware ECC on Flash read.

Peripheral integration includes an advanced 16-bit timer (TIM1) with dead-time insertion and complementary outputs for motor control, two general-purpose 16-bit timers (TIM2/TIM3), and a basic 8-bit timer (TIM4). Communication is supported via UART with LIN/SmartCard/IrDA modes, SPI up to 8 Mbit/s, and I²C up to 400 kbit/s - all with configurable clock gating and DMA-ready registers.

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 STM8S105K6T6CTR, STM8S003F3P6 sacrifices EEPROM and I/O count for lower cost and footprint, while STM8L052C6T6 trades motor-control peripherals and I/O drive strength for superior ultra-low-power performance - choice depends on whether EEPROM persistence or sub-µA sleep dominates the design requirement.

Availability

STM8S105K6T6CTR is available at Aetrix Electronics and suitable for industrial motor control, home appliance UI, smart sensor nodes, and energy metering interface applications requiring stable component supply and long-term manufacturing continuity.

Supply support for STM8S105K6T6CTR 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 delivers cost-optimized 8-bit MCUs targeting appliance control, industrial automation, and sensor interface applications - emphasizing robustness, integrated peripherals, and toolchain maturity over raw performance.

FAQ

What is the maximum operating frequency and voltage range for STM8S105K6T6CTR?

The STM8S105K6T6CTR operates at up to 16 MHz across a supply voltage range of 2.95 V to 5.5 V. Frequency scaling is voltage-dependent: full 16 MHz is guaranteed at VDD ≥ 3.0 V; below that, maximum fCPU decreases per Figure 11 in DS5855 Rev 16. The internal 16 MHz RC oscillator is user-trimmable to ±1% accuracy at 5 V and 25 °C.

Does STM8S105K6T6CTR support in-circuit debugging and programming?

Yes - it features a Single-Wire Interface Module (SWIM) accessible via a single dedicated pin (pin 11 in LQFP48), enabling full-speed debugging, flash programming, and memory inspection without halting the CPU. ST-LINK/V2 and ST-LINK/V3 debuggers are natively supported, and no external debug header is required.

How many I/O pins support high-sink capability, and what is the rated current?

16 I/O pins (specifically PA3–PA7, PB3–PB7, PC3–PC7) support high-sink output with 20 mA continuous current per pin at VDD = 5 V and TA = 25 °C. This is confirmed in Table 38 (Output driving current – standard ports) and Table 40 (high-sink ports) of DS5855 Rev 16, enabling direct drive of LEDs, small relays, or logic-level MOSFET gates.

Is the data EEPROM truly wear-levelled, and what is its write endurance?

No - the 1 Kbyte data EEPROM is not wear-leveled in hardware; however, it guarantees 300,000 write/erase cycles per byte (not per block) and 20-year data retention at 55 °C after 10,000 cycles, as specified in Section 4.4 and Table 36 of DS5855 Rev 16. Application-level wear leveling must be implemented in firmware if extended EEPROM lifetime is required.