STM8S105C4T3 - 16MHz 16KB Flash 8-Bit MCU | STMicroelectronics
料号： STM8S105C4T3 ✓ 量产中STM8S105C4T3 概述
What is an 8-bit access-line microcontroller? An 8-bit MCU is a microcontroller whose primary processing and data path is optimized for 8-bit values. The STM8S105C4T3 combines that architecture with Flash memory, static RAM, embedded EEPROM, timers, serial interfaces, analog conversion, and GPIO in one device. Within the broader hierarchy of MCU, embedded processor, and semiconductor, it sits between simple 8-bit controllers and more capable 32-bit Cortex-M microcontrollers, providing a useful balance of performance, memory, peripheral integration, and design complexity.
The STM8S105x4/6 access-line family provides from 16 KB to 32 KB of Flash program memory and integrated true data EEPROM, according to the STMicroelectronics product-page search result. The C4T3 ordering identifies a device with 16 KB of Flash in the STM8S105C4 configuration and the 48-LQFP package. The 16 MHz operating speed is suitable for motor-control peripherals, communications, consumer accessories, industrial controllers, and embedded products that do not require a high-performance 32-bit core.
The 38 available I/O pins make the 48-LQFP package useful when a design needs multiple control and monitoring signals while preserving a modest footprint. Available resources described by the verified data include 2 KB of RAM, integrated EEPROM, and the STM8S105xx access-line feature set. Detailed clock-tree options, ADC characteristics, timer resolutions, supply limits, and package thermal parameters were not included in the supplied search records and therefore require confirmation from the official manufacturer datasheet before design release.
Typical applications include small motor controllers, sensor-hub boards, communication modules, panel interfaces, appliance controls, and compact industrial automation products. The 16 MHz core and 16 KB Flash are particularly useful for control loops and protocol state machines, while the 38 I/O pins simplify peripheral connection compared with smaller packages.
Designers should confirm the complete 48-pin assignment, oscillator requirements, reset behavior, peripheral pin multiplexing, and electrical limits from the official STM8S105 datasheet. PCB layouts should preserve decoupling and exposed-pad thermal requirements where applicable, and firmware must account for alternate-function reassignment when using the numerous I/O pins.
This product page consolidates the verified manufacturer and distributor facts, distinguishes the standard T3 ordering from the available T3TR reel variant, and clearly flags technical details that still need datasheet confirmation for engineering use.
直接替换替代料： STM8S105C4T3 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： STM8S105C4T3 （相同外形与封装尺寸） ——差异在于 Package, Flash Program Memory, ADC Resolution, Architecture, Microcontroller Type.
STM8S105C4T3TR
✅ 直接替换📋 参考替代料（不在目录中）
STM8S005C6T6
✅ 直接替换联系询价
查看数据手册 →MC9S08PA16AVLD
✅ 直接替换📋 参考替代料（不在目录中）
STM8S105C4T3 最大额定值与电气特性
| Microcontroller Type | 8-bit access-line microcontroller |
| 最大时钟频率 | 16 MHz |
| Flash Program Memory | 16 KB (16K x 8) |
| RAM Size | 2K x 8 |
| Number of I/O | 38 |
| 封装 | 48-LQFP (7 x 7 mm) |
| Program Memory Type | Flash |
| Integrated Data EEPROM | Present in the STM8S105xx access-line family |
| Architecture | 8-bit |
| Product Family | STM8S access line |
| Density Class | Medium-density device |
| 安装类型 | Surface Mount |
STM8S105C4T3 48-lqfp (7 x 7 mm) 引脚配置指南
STM8S105C4T3（48-lqfp (7 x 7 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： STM8S105C4T3.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STM8S105C4T3 适用于 6 应用s: Compact Motor Controller, Industrial Sensor Hub, Consumer Appliance Controller, Communication Interface Module, Panel and User Interface Controller, Battery-Powered Sensor Node.
Compact Motor Controller
The STM8S105C4T3 fits compact motor-control and auxiliary drive designs that need more I/O than a minimal 8-bit MCU while remaining limited to a 7 x 7 mm footprint. Its 16 MHz clock provides timing headroom for PWM generation, input capture, fault handling, and control-state logic, while 38 I/O pins provide access to sensors, gate-drive controls, status indicators, and communication signals. The 16 KB Flash is appropriate for a focused firmware rather than a large application framework. Engineers should confirm timer channel mapping, pin alternate functions, timing margins, and motor-driver co-design in the official datasheet. Compared with a 32-bit MCU, the STM8S105C4T3 can reduce firmware complexity and cost, but it requires careful peripheral and interrupt planning to maintain control-loop timing.
推荐
Industrial Sensor Hub
The STM8S105C4T3 is suitable for a small industrial sensor hub that aggregates switches, analog-monitored inputs, local indicators, and a serial communications channel. Its 38 I/O pins reduce the need for external multiplexers when several sensors or discrete interface signals are present, while the 16 MHz core can handle periodic sampling, filtering, debouncing, and protocol framing. The integrated true data EEPROM identified for the STM8S105 access-line family can be useful for calibration or configuration retention, although its exact capacity must be confirmed in the manufacturer datasheet. Use the device in designs where deterministic timing, low board area, and simple firmware are more important than 32-bit arithmetic. Validate electrical limits, ADC performance, isolation strategy, environmental range, and industrial qualification separately.
推荐
Consumer Appliance Controller
The STM8S105C4T3 can serve as the primary controller in a compact appliance or user-interface module that coordinates buttons, indicators, relays, sensors, and an embedded communications link. Its 8-bit architecture and 16 KB Flash are well matched to straightforward sequencing, state-machine, and supervision functions, while 38 I/O pins provide ample control resources for multiple front-panel and load functions. Placing the MCU in a 48-LQFP 7 x 7 mm package supports compact PCB layouts without requiring the largest exposed area of a high-pin-count device. The design should still include appropriate flyback protection, surge control, debouncing, and safe-state behavior for mains-connected loads. Confirm timer resources, communication peripherals, supply range, and temperature limits from the official STM8S105C4 documentation.
推荐
Communication Interface Module
The STM8S105C4T3 is applicable to communication modules that act as a protocol concentrator, gateway front end, or configurable interface between a host and peripheral circuitry. Its 16 MHz core provides sufficient instruction throughput for serial framing, buffering, state management, and supervisory logic, while the 38 I/O pins support multiple chip-select, interrupt, status, and data-path functions. The STM8S105xx family's integrated true data EEPROM can assist with endpoint configuration or calibration retention, subject to verified capacity and endurance limits. For a production communication design, check which UART, SPI, or I2C resources exist in the exact device, verify pin multiplexing, and calculate baud-rate and protocol timing margins. A cross-brand MCU may require firmware and board changes, so the STM8S105C4T3 is preferable when retaining the established STM8 ecosystem is a primary requirement.
推荐
Panel and User Interface Controller
The STM8S105C4T3 fits a local panel controller that reads buttons, rotary encoders, lamps, buzzers, and display-related signals while maintaining deterministic user-interface timing. Its 38 I/O pins allow designers to allocate signals directly instead of adding large multiplexers, and the 16 MHz clock supports responsive debouncing, periodic refresh, and communication with a display or host. The 16 KB Flash can hold a compact application layer, but developers should include protocol and update overhead in the memory budget. The 48-LQFP 7 x 7 mm package also reduces board area compared with many higher-pin-count controllers. Verify the exact timer channels, GPIO current limits, oscillator configuration, and package pin map before routing. If only a small number of controls are needed, a smaller 8-bit MCU may offer a lower-cost alternative.
推荐
Battery-Powered Sensor Node
The STM8S105C4T3 can be used in a battery-powered sensor node when a modest 8-bit control function, several sensors, and local status or communication signals are required. Its 16 MHz clock permits time-based measurement and communication tasks without moving to a more complex processor, and the integrated true data EEPROM can support persistent configuration in the STM8S105xx family. However, low-power suitability depends on sleep modes, active current, peripheral shutoff behavior, and wake-up timing that were not quantified in the supplied data; these must be measured or verified from the official datasheet before battery-life claims are made. Use a power-management strategy that disables unused peripherals and accounts for sensor and radio standby currents. PCB design should isolate sensitive measurement paths from switching and radio circuitry even when the MCU itself is compact.
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推荐产品汇总
工程参考数据： STM8S105C4T3 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | STM8S105C4T3TR | STM8S005C6T6 | MC9S08PA16AVLD |
|---|---|---|---|---|
| Package | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) | 48-LQFP | 48-LQFP |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Freescale Semiconductor |
| CPU Architecture | 8-bit | 8-bit | 8-bit | 8-bit |
| Product Family | STM8S105 access line | STM8S105 access line | STM8S005 | MC9S08 PA16 |
关键差异点
- High I/O density in a compact 7 x 7 mm package （对比 MC9S08PA16AVLD)
- Integrated true data EEPROM support （对比 STM8S005C6T6)
- Verified same-device reel alternative （对比 STM8S105C4T3TR)
设计说明
Place all required input and output decoupling capacitors immediately adjacent to the STM8S105C4T3 supply and ground pins, and route them using short, low-loop-area paths. Before schematic release, assign every signal in the 48-LQFP footprint to power, ground, reset, oscillator, programming, or a valid GPIO/alternate function. Because the verified records provide the package and pin count but not the detailed pin map, do not infer connections from the package outline; use the current manufacturer datasheet and package drawing. Also preserve exposed-pad thermal copper where the selected package drawing specifies it, while observing the manufacturer's maximum footprint and reflow guidance.
Define the power tree before connecting the STM8S105C4T3 to external loads, because the supplied data does not specify its allowable supply-voltage range, absolute maximum ratings, or internal peripheral current limits. Verify those values in the official datasheet and add appropriate protection, filtering, and sequencing. If the board includes relays, motor drivers, LEDs, or wireless modules, account for their separate supply and inrush requirements rather than assuming they can be powered directly from an MCU pin. For battery systems, measure sleep-mode and active-mode current in the final firmware state because the provided search records do not quantify power consumption.
Keep oscillator, reset, and high-speed communication routes short and away from noisy switching nodes and long current paths. For an 8-bit MCU at 16 MHz, firmware timing and physical signal integrity still depend on clean references and controlled return paths. Separate analog sensing from digital switching where possible, use a common ground strategy appropriate to the board architecture, and avoid routing high-current inductive loops beneath sensitive inputs. Validate the actual pin-multiplexing and peripheral requirements against the official STM8S105C4 documentation, since alternate functions can change which external pins can be used for control, communication, and timers.
合规信息
The supplied verified search records do not contain compliance declarations for the exact STM8S105C4T3 ordering code. Confirm RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status using current STMicroelectronics documentation.