STM8S105S6T3C - 16MHz 32KB 8-Bit MCU | STMicroelectronics
MPN： STM8S105S6T3C ✓ 啟用中STM8S105S6T3C 概覽
A microcontroller is a programmable control component that integrates a CPU core, nonvolatile program memory, data memory, peripherals, and I/O into one semiconductor package. The STM8S105 belongs to the STM8 medium-density access-line family. Within the STM8 hierarchy, it provides a compact, low-power platform for embedded control while retaining familiar serial interfaces, timers, analog conversion, and watchdog functions.
Key features include 16 MHz maximum clock operation, 32 KB of Flash memory, true integrated EEPROM, and a 10-bit analog-to-digital converter. The peripheral set includes TIM1 advanced-control and general-purpose timers, TIM2, TIM3, and TIM4, SPI, I2C, UART, window watchdog, independent watchdog, and the ADC. These resources support compact consumer controllers, industrial controls, sensor nodes, and embedded motor or actuator interfaces without requiring a larger microcontroller.
The STM8S105S6T3C combines an 8-bit architecture with 38 I/O ports in the 44-LQFP package. Its 16 MHz operating rate supports time-sensitive control loops, serial communication, and periodic sensor acquisition. The integrated EEPROM provides a distinct area for parameter retention, while Flash stores firmware. For designs requiring analog measurement, the 10-bit ADC converts sensor signals without requiring a separate external converter.
Typical uses include temperature controllers, small motor-control boards, communication modules, appliance interfaces, LED-control systems, and compact industrial control products. The STM8S105S6T3C is especially appropriate where a modest processing load, multiple serial peripherals, and a wide operating-temperature range are more important than a high-performance 32-bit CPU or a large memory footprint.
PCB design should follow the manufacturer's pin-definition and recommended decoupling guidance. Place the supply bypass capacitors close to their power and ground pins, reserve a stable clock source, and route sensitive analog inputs away from high-current switching nodes. Confirm the exact package dimensions, exposed pad treatment, and pin assignments against the manufacturer datasheet before releasing artwork.
This page combines device specifications, interface coverage, replacement guidance, and application-focused design considerations. It also distinguishes genuine package-compatible STM8S105 order-code options from unrelated MCUs, helping engineers narrow a replacement without confusing similar memory sizes with true drop-in compatibility.
直接替換替代品，適用於 STM8S105S6T3C — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： STM8S105S6T3C （相同外形與佔位） — 差異在於 Flash Program Memory, Operating Temperature Range.
STM8S105S6T3
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM8S105S6T6
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →STM8S105S6T6C
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM8S105S6T3C 最大額定值與電氣特性
| Microcontroller Type | 8-bit MCU |
| Product Series | STM8S access line |
| 最大時脈頻率 | 16 MHz |
| Flash Program Memory | 32 KB (32K × 8 bits) |
| Device Classification | Medium-density |
| ADC Resolution | 10 bits |
| Supply Voltage Range | 2.95 V to 5.5 V |
| I/O Port Count | 38 ports |
| 工作溫度範圍 | -40 °C to +125 °C |
| Package Type | 44-LQFP (10 mm × 10 mm) |
| 安裝類型 | Surface mount |
| Advanced-Control Timer | TIM1 |
| General-Purpose Timers | TIM2 and TIM3 |
| Basic Timer | TIM4 |
| Serial Interfaces | SPI, I2C, and UART |
| Watchdog Peripherals | Window watchdog and independent watchdog |
| Reference Manual | RM0016 |
| 生命週期狀態 | Active |
STM8S105S6T3C 44-lqfp (10 mm × 10 mm) 腳位配置指南
STM8S105S6T3C（44-lqfp (10 mm × 10 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： STM8S105S6T3C.
請參閱 資料表 以查看完整腳位配置。
典型應用
STM8S105S6T3C 適用於 6 應用s: Temperature and process controllers, Small motor and actuator control, Sensor and IoT nodes, Appliance and user-interface controllers, LED lighting control, Industrial communication modules.
Temperature and process controllers
The STM8S105S6T3C fits compact temperature controllers because its 16 MHz processor provides useful timing margin while the 10-bit ADC handles analog sensor inputs. TIM2, TIM3, and TIM4 support periodic sampling, control updates, and output timing, while the UART supports configuration or monitoring links. The 32 KB Flash provides room for control algorithms, menus, and fault handling, and integrated EEPROM can retain calibration values. With 38 I/O ports, the controller can accommodate digital inputs, display or indicator outputs, relays, and communications in a compact board. The -40 °C to +125 °C operating range also supports equipment intended for demanding industrial environments when the complete circuit meets its own environmental requirements.
推薦
Small motor and actuator control
The STM8S105S6T3C can serve as the supervisory controller in small motor and actuator products where an 8-bit core is sufficient. Its advanced-control TIM1 and additional TIM2, TIM3, and TIM4 timers support pulse generation, dead-time control where applicable, input capture, and independent periodic functions. A 16 MHz clock allows control tasks and communication protocols to coexist more comfortably than on a lower-rate basic microcontroller. The 38 I/O ports provide connections for limit switches, position sensors, driver-control signals, and status indicators. Designers should use suitable transistor or MOSFET driver stages, protection circuitry, and current sensing because the MCU pins are control signals rather than direct motor-power outputs.
推薦
Sensor and IoT nodes
The STM8S105S6T3C is appropriate for compact sensor and IoT nodes that require local acquisition, configurable digital I/O, and serial connectivity without a high-power application processor. Its 10-bit ADC supports basic analog sensing, while SPI and I2C can connect sensors, memory, or display modules. The UART provides a straightforward path for wired configuration or data transfer, and the independent and window watchdogs support dependable recovery from abnormal firmware states. Integrated EEPROM is useful for calibration data, counters, and device settings, while the 32 KB Flash stores the networking and application firmware. The 44-LQFP package offers more I/O than the smallest MCU packages without moving to a large fine-pitch array.
推薦
Appliance and user-interface controllers
The STM8S105S6T3C can coordinate appliance functions that combine button inputs, displays, sensors, timers, and serial accessories. Its 38 I/O ports leave ample room for panel controls, LEDs, relay-control signals, and external interface modules. TIM2, TIM3, and TIM4 are useful for display refresh, debounce timing, motor timing, and scheduled output events, while the 10-bit ADC can monitor potentiometers, temperature elements, or supply-related analog signals. At 16 MHz, the device is well suited to straightforward menu and state-machine logic. Firmware must still enforce debounce, watchdog servicing, output-safe defaults, and fail-state behavior for connected loads.
推薦
LED lighting control
The STM8S105S6T3C is suitable for LED lighting controllers that require precise pulse timing, multiple outputs, and diagnostic communication. TIM1 and the general-purpose timers can generate PWM signals for constant-current LED drivers or timing sequences for decorative and signage systems. The 38 I/O ports support color channels, enable controls, buttons, fault inputs, and indicators. A 16 MHz clock permits smooth timing updates and responsive user interaction, while the 10-bit ADC can support current monitoring or analog dimming when the board includes suitable sensing hardware. Use current limiting and thermal protection in the external driver stage, and treat each LED channel as a power circuit rather than as a direct MCU load.
推薦
Industrial communication modules
The STM8S105S6T3C can be used in compact communication modules because it combines SPI, I2C, and UART with a 16 MHz processor and 38 I/O ports. UART suits point-to-point links, while SPI and I2C can connect local transceivers, sensors, or memories. The independent and window watchdogs provide two complementary mechanisms for maintaining firmware reliability, and the integrated EEPROM supports configuration and communication parameters. The medium-density 32 KB Flash configuration is adequate for protocol handling and local supervision rather than demanding graphics or high-bandwidth processing. For industrial deployment, include transient protection, proper grounding, watchdogs in the system-level failure strategy, and validated isolation or surge protection when the module connects to external lines.
推薦
工程參考資料，適用於 STM8S105S6T3C — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | STM8S105S6T3 | STM8S105S6T6 | STM8S105S6T6C |
|---|---|---|---|---|
| Package | 44-LQFP (10 mm × 10 mm) | 44-LQFP (10 mm × 10 mm) | 44-LQFP (10 mm × 10 mm) | 44-LQFP (10 mm × 10 mm) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| CPU Architecture | 8-bit | 8-bit | 8-bit | 8-bit |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Flash Program Memory | 32 KB | 32 KB | 32 KB | 32 KB |
| ADC Resolution | 10 bits | 10 bits | 10 bits | 10 bits |
| Supply Voltage Range | 2.95 V to 5.5 V | 2.95 V to 5.5 V | 2.95 V to 5.5 V | 2.95 V to 5.5 V |
| I/O Port Count | 38 ports | 38 ports | 38 ports | 38 ports |
| Ordering-Code Difference | T3C order code | T3 code without terminal C suffix | T6 temperature-grade code | T6 temperature-grade code with terminal C suffix |
主要差異化特點
- Access-line integration reduces external support components (對比STM8S105S6T3)
- Multiple timer resources support concurrent control tasks (對比STM8S105S6T6)
- Broad interface and I/O coverage in one package (對比STM8S105S6T6C)
設計說明
Place the required power-bypass capacitors adjacent to the STM8S105S6T3C supply pins and connect each capacitor's ground return directly into the surrounding ground plane. Keep the 44-LQFP footprint within the manufacturer's dimensional and land-pattern limits, verify pin 1 orientation, and confirm exposed-pad or thermal-via treatment from the package drawing before fabrication. Avoid routing clock and analog sensor traces beneath or immediately beside switching-power and relay-driver paths.
Design the board around the 2.95 V to 5.5 V operating range and account for the voltage required by the selected clock source, sensors, communications, and load drivers. If the MCU sits behind a regulator, add local bulk storage for transient response and use separate filtering paths for noisy analog measurements. Do not drive inductive loads or high-current outputs directly from GPIO pins; use suitable transistor, MOSFET, or driver stages with flyback protection.
Treat the T3, T6, and terminal-C order-code distinctions as qualification items rather than cosmetic packaging labels. Before replacing the STM8S105S6T3C, compare the approved-part-number table, temperature grade, pin map, datasheet revision, and device marking. Software migration is also not automatic: review vector-table layout, startup code, option bytes, peripheral naming, and the STM8 development toolchain used by the original design.
Use a short, continuous ground reference beneath and around the MCU, and keep supply-current return paths away from sensitive analog inputs. If the 10-bit ADC monitors low-level sensors, route the signal through a quiet analog section, provide a local reference or filtering network appropriate to the sensor, and avoid switching-node overlap. For SPI or I2C buses, follow rise-time and capacitance limits from the manufacturer datasheet rather than relying only on nominal clock speed.
合規資訊
The device is listed as active, but explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals statements are not present in the cited product information. Confirm the exact order code and current manufacturer environmental documentation before making a compliance declaration.
