STM8S208MBT6B - 24MHz 128KB 8-Bit MCU | STMicroelectronics
料号： STM8S208MBT6B ✓ 量产中STM8S208MBT6B 概述
An STM8 microcontroller is an 8-bit embedded controller built around the STM8 architecture, a general-purpose processing platform used for real-time control, monitoring, human-interface, and communication tasks. Within the product hierarchy, the STM8 belongs to the STM8S performance line, combining an 8-bit core, embedded Flash, on-chip peripherals, and an industrial-grade operating option in a surface-mount package.
The principal features include a maximum 24 MHz operating frequency, 128 KB of Flash memory, and operation across 3.3 V and 5 V supply levels. The 80-pin LQFP package provides a large pin count for analog inputs, digital interfaces, timers, communication peripherals, and debug or programming connections. The B suffix identifies the STMicroelectronics ordering variant, while the T6 portion identifies the package, temperature, and qualification characteristics used in the ordering code.
The STM8S208MB series combines a substantial 128 KB code area with the STM8S peripheral set. This architecture is useful when firmware must manage several input channels, timers, serial communication, and embedded control logic without relying on an external memory interface. The 24 MHz clock provides additional processing margin for interrupt-intensive routines and structured control software, while the integrated Flash permits a compact, self-contained application design.
Typical uses include industrial controllers, building and automation equipment, appliance control panels, sensor acquisition systems, metering equipment, and compact embedded control modules. The 80-pin package is particularly useful when a design requires more I/O than smaller STM8 devices provide. Applications should still account for each peripheral's alternate-function mapping and the electrical limits stated in the manufacturer datasheet.
For layout, place all decoupling capacitors close to the corresponding supply pins and route high-current or high-switching-node connections away from sensitive analog inputs. Confirm oscillator, reset, programming, and boot-strapping connections against the pin-description table. SWD programming is a practical integration choice when a dedicated programming connector is required.
This page combines the confirmed STM8S208MBT6B specifications, package details, sourcing information, application guidance, and verified drop-in alternatives. It also distinguishes documented replacements from devices that require firmware, pinout, or peripheral validation before they can be treated as equivalent.
直接替换替代料： STM8S208MBT6B ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料STM8S208MBT6B 最大额定值与电气特性
| Microcontroller Type | 8-Bit Microcontroller |
| Product Series | STM8S Performance Line |
| 最大时钟频率 | 24 MHz |
| Flash Program Memory | 128 KB (128K x 8) |
| 电源电压 | 3.3 V to 5 V |
| 封装 | 80-pin LQFP |
| Package Code | LQFP |
| Terminal Count | 80 terminals |
| 安装类型 | Surface Mount |
| Temperature Grade | Industrial |
| Programmable Memory | 128 KB Flash |
| Core Architecture | STM8 8-Bit CISC |
STM8S208MBT6B lqfp 引脚配置指南
STM8S208MBT6B（lqfp 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： STM8S208MBT6B.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STM8S208MBT6B 适用于 6 应用s: Industrial Automation Controller, Building Automation and HVAC Control, Appliance and User Interface Control, Sensor Acquisition and Monitoring, Metering and Energy Measurement, Communication Gateway and Protocol Bridge.
Industrial Automation Controller
The STM8S208MBT6B fits industrial automation controllers that combine several input channels, periodic control routines, local communication, and operator feedback. Its 24 MHz maximum clock provides processing margin for interrupt-driven control, while 128 KB of Flash accommodates application firmware, configuration data, and protocol handlers. The 80-pin LQFP exposes more I/O than compact 20-pin or 32-pin devices, making it practical for distributed machine-control boards. Design the supply network for 3.3 V or 5 V operation, isolate switching nodes from analog inputs, and confirm peripheral assignments in the manufacturer pin table.
Building Automation and HVAC Control
The STM8S208MBT6B is suitable for building automation equipment that monitors environmental inputs and controls relays, valves, fan stages, or actuators. Its 128 KB of embedded Flash can hold control logic, calibration tables, communication stacks, and diagnostic routines without external program memory. The 24 MHz clock supports responsive task scheduling, and the 80-pin LQFP provides sufficient pins for sensor inputs, digital status, serial interfaces, and timing functions. Keep sensitive analog channels away from switching regulators and relay drivers, and use the manufacturer electrical limits to define component ratings.
Appliance and User Interface Control
The STM8S208MBT6B can serve as the central controller in appliances and equipment with a display, keypad, encoder, sensors, and motor or relay outputs. The 128 KB Flash capacity supports layered application firmware, while the 80-pin package simplifies access to multiple I/O functions in a compact control assembly. Its 8-bit STM8 architecture is appropriate for deterministic supervisory and user-interface tasks rather than high-complexity graphics. Use SWD for programming, place bypass capacitors at the supply pins, and follow the oscillator requirements shown in the manufacturer reference design.
Sensor Acquisition and Monitoring
The STM8S208MBT6B supports monitoring systems that combine sensor inputs with filtering, threshold evaluation, logging, and communication. Its maximum 24 MHz operating frequency allows efficient handling of interrupts and control tasks, while 128 KB of Flash provides room for calibration and diagnostic code. The large 80-pin LQFP can accommodate multiple digital and analog-capable pins, although the exact usable ADC channels depend on alternate-function assignments. Place analog inputs away from high-current traces, reference a quiet supply section, and verify acquisition timing and resolution against the device datasheet.
Metering and Energy Measurement
The STM8S208MBT6B is applicable to compact metering products that measure analog quantities, maintain calibration, display results, and communicate with a host. The 128 KB Flash area can hold measurement algorithms, correction tables, event logs, and multi-protocol firmware, while the 24 MHz clock supports regular sampling and computation. The 80-pin LQFP offers ample connections for sensor inputs, display control, and communications. Accuracy depends on the selected analog front end and reference design; follow the manufacturer application guidance for grounding, filtering, shielding, and calibration.
Communication Gateway and Protocol Bridge
The STM8S208MBT6B can act as a compact protocol bridge or gateway when it must combine serial interfaces with control logic and local data storage. Its 128 KB of embedded Flash supports protocol stacks, frame processing, configuration storage, and firmware update logic, and the 24 MHz clock provides useful throughput for interrupt-driven interfaces. The 80-pin package simplifies implementation of UART, SPI, I2C, or other board-level connections where those functions are available and suitably mapped. Validate pin multiplexing, peripheral electrical limits, and timing before production, and provide separate filtering for noisy communication lines.
工程参考数据： STM8S208MBT6B ——对比、设计指导和合规信息。
选型指南
设计说明
Decouple each supply connection with the capacitance and placement specified in the manufacturer reference design. Keep the 3.3 V or 5 V distribution path away from relay drivers, motor outputs, and other high-current switching stages. Verify the selected operating voltage against oscillator configuration, peripheral limits, and external interface levels before finalizing the power tree.
Place bypass capacitors at the supply pins and provide a low-impedance ground return beneath the device. Use the pin-description table to identify all analog, digital, oscillator, reset, and programming functions. The 80-pin LQFP requires careful escape routing, so verify land-pattern dimensions and pin-one orientation against the manufacturer package drawing before fabrication.
Do not treat another 80-pin LQFP MCU as a substitute solely because its outline matches. A valid redesign must address pin multiplexing, memory size, peripheral assignment, clocking, software, boot behavior, and programming. Similarly, do not infer analog accuracy or ADC performance from the 24 MHz CPU frequency; consult the electrical characteristics and application guidance for those functions.
合规信息
The confirmed product information identifies an industrial temperature grade but does not provide definitive compliance declarations. Review the manufacturer product page and material declarations for the exact ordering code before release.