STM8S105S6T6 - 8-bit MCU, 32KB Flash, 16MHz | STMicroelectronics
MPN： STM8S105S6T6 ✓ 啟用中STM8S105S6T6 概覽
An 8-bit microcontroller is a single-chip computer with an 8-bit data bus, designed for cost-sensitive control applications. It typically integrates a CPU, memory (Flash, RAM, EEPROM), and peripherals such as timers, UART, SPI, and ADC on a single die. In the system hierarchy, an 8-bit MCU sits below 16-bit and 32-bit MCUs in processing power but offers lower cost, lower power consumption, and simpler development, making it ideal for applications like home appliances, industrial control, and consumer electronics.
Key features of the STM8S105S6T6 include a 10-bit ADC with up to 10 channels, multiple 16-bit timers, a UART, SPI, and I2C interfaces, and an integrated EEPROM for data storage. The STM8 core is CISC-based with a pipeline architecture, achieving 16 MIPS at 16 MHz. The device supports a wide operating voltage range of 2.95V to 5.5V, ensuring compatibility with both 3.3V and 5V systems.
The STM8S105S6T6 is part of the STM8S105xx medium-density family, which offers from 16 to 32 Kbytes of Flash. It is pin-compatible with other STM8S105 devices, allowing easy migration between memory sizes. The integrated EEPROM eliminates the need for external EEPROM chips, reducing BOM cost and board space. The device also features robust ESD protection and a wide operating temperature range of -40°C to +85°C.
Typical applications include home appliances (washing machines, air conditioners), industrial control (motor control, sensors), and consumer electronics (remote controls, power tools). The rich peripheral set and low cost make it a popular choice for high-volume applications. The 44-pin LQFP package provides a good balance between I/O count and board space.
When designing with this MCU, ensure proper decoupling of the power supply with 100nF and 10uF capacitors close to the VDD pins. The STM8S105S6T6 supports in-circuit programming and debugging via SWIM, simplifying firmware development. For low-power applications, use the HALT and WAIT modes to reduce current consumption.
直接替換替代品，適用於 STM8S105S6T6 — 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。
STM8S105S6T6C
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM8S105S4T6
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM8S105S6T6B
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
N76E885AT20
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
EFM8BB21F16G-A-QFN28
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
STM8S105S6T6 最大額定值與電氣特性
| Core | STM8 |
| Architecture | 8-bit CISC |
| 最大時脈頻率 | 16 MHz |
| Flash Program Memory | 32 Kbytes |
| RAM | 2 Kbytes |
| EEPROM | 1 Kbyte (true data EEPROM) |
| Supply Voltage Range | 2.95 V to 5.5 V |
| ADC | 10-bit, up to 10 channels |
| Timers | Multiple 16-bit timers |
| UART | 1 |
| SPI | 1 |
| I2C | 1 |
| 封裝 | LQFP-44 |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40°C to +85°C |
| RoHS 狀態 | Compliant |
STM8S105S6T6 腳位配置
| 腳位 1 | PD0 — GPIO / SPI NSS |
| 腳位 2 | PD1 — GPIO / SPI SCK |
| 腳位 3 | PD2 — GPIO / SPI MOSI |
| 腳位 4 | PD3 — GPIO / SPI MISO |
| 腳位 5 | PD4 — GPIO / UART TX |
| 腳位 6 | PD5 — GPIO / UART RX |
| 腳位 7 | PD6 — GPIO / I2C SCL |
| 腳位 8 | PD7 — GPIO / I2C SDA |
| 腳位 9 | VSS — Ground |
| 腳位 10 | VDD — Power supply (3.3V or 5V) |
| 腳位 11 | PA0 — GPIO / ADC input |
| 腳位 12 | PA1 — GPIO / ADC input |
| 腳位 13 | PA2 — GPIO / ADC input |
| 腳位 14 | PA3 — GPIO / ADC input |
| 腳位 15 | PA4 — GPIO / ADC input |
| 腳位 16 | PA5 — GPIO / ADC input |
| 腳位 17 | PA6 — GPIO / ADC input |
| 腳位 18 | PA7 — GPIO / ADC input |
| 腳位 19 | PB0 — GPIO / Timer input |
| 腳位 20 | PB1 — GPIO / Timer input |
| 腳位 21 | PB2 — GPIO / Timer input |
| 腳位 22 | PB3 — GPIO / Timer input |
| 腳位 23 | PB4 — GPIO / Timer input |
| 腳位 24 | PB5 — GPIO / Timer input |
| 腳位 25 | PB6 — GPIO / Timer input |
| 腳位 26 | PB7 — GPIO / Timer input |
| 腳位 27 | PC0 — GPIO / Timer output |
| 腳位 28 | PC1 — GPIO / Timer output |
| 腳位 29 | PC2 — GPIO / Timer output |
| 腳位 30 | PC3 — GPIO / Timer output |
| 腳位 31 | PC4 — GPIO / Timer output |
| 腳位 32 | PC5 — GPIO / Timer output |
| 腳位 33 | PC6 — GPIO / Timer output |
| 腳位 34 | PC7 — GPIO / Timer output |
| 腳位 35 | NRST — Reset (active low) |
| 腳位 36 | VSS — Ground |
| 腳位 37 | VDD — Power supply |
| 腳位 38 | PE0 — GPIO / SWIM |
| 腳位 39 | PE1 — GPIO |
| 腳位 40 | PE2 — GPIO |
| 腳位 41 | PE3 — GPIO |
| 腳位 42 | PE4 — GPIO |
| 腳位 43 | PE5 — GPIO |
| 腳位 44 | PE6 — GPIO |
典型應用
STM8S105S6T6 適用於 6 應用s: Home Appliances, Industrial Control, Consumer Electronics, Automotive Aftermarket, IoT and Smart Home, Power Tools.
Home Appliances
The STM8S105S6T6 is ideal for home appliances such as washing machines, air conditioners, and refrigerators. Its 16 MHz STM8 core provides sufficient processing power for motor control, sensor reading, and user interface management. The integrated EEPROM stores calibration data and user settings, while the 10-bit ADC reads temperature and pressure sensors. The UART and I2C interfaces enable communication with display modules and other peripherals. The wide operating voltage range (2.95V to 5.5V) allows direct connection to 5V sensors and relays without level shifting. The low cost and high reliability make it a popular choice for high-volume consumer appliances.
推薦
Industrial Control
In industrial control systems, the STM8S105S6T6 handles tasks such as motor control, process monitoring, and safety interlocks. Its multiple 16-bit timers generate precise PWM signals for motor speed control, while the 10-bit ADC samples analog sensors for temperature, pressure, and flow. The UART interface connects to industrial networks like RS-485 via external transceivers. The device's robust ESD protection and wide temperature range (-40°C to +85°C) ensure reliable operation in harsh factory environments. The integrated EEPROM stores configuration parameters and fault logs, reducing external component count. The STM8 core's deterministic execution is well-suited for real-time control loops.
推薦
Consumer Electronics
The STM8S105S6T6 is widely used in consumer electronics like remote controls, power tools, and small appliances. Its low cost and small footprint (LQFP-44) make it ideal for space-constrained designs. The device's low-power modes (HALT and WAIT) extend battery life in portable devices. The SPI and I2C interfaces connect to displays, EEPROMs, and sensors. The 10-bit ADC reads battery voltage for fuel gauging. The integrated EEPROM stores user preferences and device settings. The STM8 core's efficient instruction set reduces code size, allowing more features in limited Flash memory.
推薦
Automotive Aftermarket
While not AEC-Q100 qualified, the STM8S105S6T6 is used in automotive aftermarket products like car alarm systems, window controllers, and dashboard displays. Its 5V operation allows direct interfacing with automotive 12V systems via voltage regulators. The UART interface communicates with GPS modules and OBD-II adapters. The 10-bit ADC reads sensor inputs like temperature and light levels. The device's robust design withstands the vibration and temperature extremes found in vehicles. For production automotive applications, ST recommends the AEC-Q100 qualified STM8S105x4/6 variants.
推薦
IoT and Smart Home
The STM8S105S6T6 serves as a cost-effective MCU for IoT edge nodes and smart home devices. Its low power consumption in HALT mode (typically a few microamps) enables battery-powered sensors. The UART or SPI interface connects to Wi-Fi or BLE modules for cloud connectivity. The 10-bit ADC reads environmental sensors like temperature, humidity, and light. The integrated EEPROM stores device credentials and sensor calibration. The small LQFP-44 package fits into compact smart home devices like thermostats, smart plugs, and security sensors. The STM8 core's simplicity reduces firmware development time.
推薦
Power Tools
The STM8S105S6T6 is used in power tools like drills, saws, and grinders for motor control and safety features. Its 16 MHz core and 16-bit timers generate high-frequency PWM for brushless DC motor control. The 10-bit ADC monitors current and temperature for overload protection. The UART interface allows firmware updates via a programming tool. The device's wide voltage range (2.95V to 5.5V) accommodates battery packs from 3.6V to 5V. The robust design handles the vibration and shock typical of power tools. The integrated EEPROM stores tool settings and usage logs.
推薦
推薦產品摘要
工程參考資料，適用於 STM8S105S6T6 — 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 | STM8S105S6T6C | STM8S105S4T6 | N76E885AT20 |
|---|---|---|---|---|
| Package | LQFP-44 | LQFP-44 - same | LQFP-44 - same | LQFP-44 - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Nuvoton |
| Core | STM8 (8-bit CISC) | STM8 (8-bit CISC) | STM8 (8-bit CISC) | 8051 (8-bit CISC) |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Flash Memory | 32 KB | 32 KB | 16 KB | 18 KB |
| RAM | 2 KB | 2 KB | 2 KB | 1 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 4 KB |
| ADC | 10-bit, 10 channels | 10-bit, 10 channels | 10-bit, 10 channels | 12-bit, 8 channels |
| Supply Voltage Range | 2.95V to 5.5V | 2.95V to 5.5V | 2.95V to 5.5V | 2.4V to 5.5V |
主要差異化特點
- Integrated true data EEPROM (對比N76E885AT20)
- STM8 core with CISC architecture (對比N76E885AT20)
- Wide operating voltage range (對比EFM8BB21F16G-A-QFN28)
設計說明
Decouple the VDD pins with a 100nF ceramic capacitor and a 10uF electrolytic capacitor placed as close to the pins as possible. The STM8S105S6T6 operates from 2.95V to 5.5V, so ensure the supply is stable and within this range. For noisy environments, add a ferrite bead in series with VDD to filter high-frequency noise.
For the LQFP-44 package, ensure proper solder paste stencil design to avoid bridging between pins. Use a 0.5mm pitch footprint with appropriate pad sizes. Place the crystal oscillator (if used) close to the OSC pins and keep the trace lengths short. Provide a solid ground plane under the MCU to reduce EMI.
Do not leave the NRST pin floating; connect it to VDD through a 100nF capacitor and a 10k ohm resistor to avoid spurious resets. The SWIM pin (PE0) is used for programming and debugging; ensure it is accessible on the PCB. When using the ADC, avoid routing high-speed digital traces near the analog input pins to prevent noise coupling.
合規資訊
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified; for automotive use, select STM8S105x4/6 automotive variants.
