STM8S103K3U6 - 16MHz 8-Bit MCU with 8KB Flash | STMicroelectronics
料号： STM8S103K3U6 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.2913 | $2.29 |
| 10 | $2.2913 | $22.91 |
| 100 | $2.2913 | $229.13 |
| 500 | $2.2913 | $1,145.65 |
| 1,000 | $2.2913 | $2,291.30 |
STM8S103K3U6 概述
What is an 8-bit microcontroller? An 8-bit microcontroller is a compact embedded-processing device whose central processing unit, registers, data paths, and instruction handling are organized around eight-bit values. Within the broader semiconductor hierarchy, the STM8S103K3U6 is an MCU, then an embedded controller, then a general-purpose semiconductor used in control and communication products. The STM8S family combines program memory, RAM, data EEPROM, timers, serial interfaces, and analog conversion on one device.
The part provides 8 Kbytes of Flash program memory, 1 Kbyte of RAM as identified in the retrieved comparison data, and 640 bytes of true data EEPROM with 300 kcycles endurance. Its 16 MHz clock supports responsive control loops, while the 10-bit ADC enables measurements from analog sensors. The integrated UART, SPI, and I²C interfaces support external transceivers, memory, sensors, displays, and other digital peripherals without requiring separate interface controllers.
The STM8S103K3U6 is identified in the verified listing as a 32-pin UFQFPN device with an exposed pad and a 5 x 5 mm package description. The exposed pad and compact land pattern are important layout considerations because they influence thermal spreading, soldering, and assembly requirements. The device uses surface-mount construction, and the supplied search data identifies an operating supply range of 2.95 V to 5.5 V, allowing operation from either regulated 3.3 V or 5 V systems.
Typical applications include low-cost sensor nodes, small motor or actuator controllers, communication modules, industrial control panels, instrument interfaces, and compact consumer products. The ADC and serial interfaces make it practical for designs that acquire analog values and transmit or store measurements. Firmware selection must match the STM8S device family, and board-level validation should include power sequencing, peripheral pin multiplexing, clock configuration, ADC calibration behavior, and exposed-pad thermal design.
For a new design, choose the STM8S103K3U6 when 8 KB of Flash, 1 KB of RAM, a 16 MHz maximum clock, and integrated mixed-signal and serial peripherals are sufficient. It is not automatically interchangeable with a different STM8 device merely because the family name is similar; verify package pinout, memory size, voltage limits, peripheral assignments, and firmware support. This page combines verified distributor and manufacturer information with sourcing guidance, design cautions, and structured technical context.
直接替换替代料： STM8S103K3U6 ——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： STM8S103K3U6 （相同外形与封装尺寸） ——差异在于 Package.
快速对比工具——选择替代料号进行并排对比：
STM8S103K3U6TR
✅ 直接替换📋 参考替代料（不在目录中）
STM8S105K6U6A
✅ 直接替换📋 参考替代料（不在目录中）
STM8S105K6B6
✅ 直接替换✓ 有现货
$0.5708 / 个
查看数据手册 →STM8S903K3U3TR
✅ 直接替换📋 参考替代料（不在目录中）
STM8S103K3U6 最大额定值与电气特性
| Product Type | 8-bit microcontroller MCU |
| Series | STM8S access line |
| Maximum Clock Speed | 16 MHz |
| Program Memory | 8 KB Flash |
| RAM | 1 KB |
| Data EEPROM | 640 bytes |
| Data Retention | 20 years at 55°C after 10 kcycles |
| EEPROM Endurance | 300 kcycles |
| Supply Voltage Range | 2.95 V to 5.5 V |
| ADC Resolution | 10-bit |
| I/O Ports | 16 |
| Timer Count | 3 timers |
| Serial Interfaces | UART, SPI, and I²C |
| 封装 | 32-pin UFQFPN, 5 x 5 mm, exposed pad |
| Architecture | 8-bit STM8 CISC core |
| 安装类型 | Surface Mount |
| Lifecycle Stage | Active |
STM8S103K3U6 32-pin ufqfpn, 5 x 5 mm, exposed pad 引脚配置指南
STM8S103K3U6（32-pin ufqfpn, 5 x 5 mm, exposed pad 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： STM8S103K3U6.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STM8S103K3U6 适用于 6 应用s: Low-Cost Sensor Node, Compact Communication Module, Small Industrial Control Board, Battery-Powered Measurement Device, Actuator and Relay Interface, Embedded Interface and Data Logger.
Low-Cost Sensor Node
The STM8S103K3U6 fits compact sensor nodes because its 10-bit ADC can acquire analog measurements while three timers support sampling, debouncing, and periodic control. The 8 KB Flash program memory and 1 KB RAM are sufficient for focused firmware that reads a sensor, applies calibration, and reports status through UART, SPI, or I²C. A 2.95 V to 5.5 V supply range supports both 3.3 V and 5 V system architectures. Designers should keep analog input routing away from fast digital signals, verify ADC input limits, and confirm that the selected pins support the required alternate functions in the 32-pin UFQFPN layout.
推荐
Compact Communication Module
STM8S103K3U6 is suitable for a small communication controller because it combines UART, SPI, and I²C with a 16 MHz clock and 8 KB Flash. It can manage configuration storage in 640 bytes of true EEPROM, poll sensors, and format data before passing it to an external transceiver or display. The 32-pin UFQFPN package helps reduce board area, while the exposed pad requires a deliberate thermal and assembly strategy. For production, verify UART baud-rate tolerance, peripheral pin muxing, ESD protection, and the electrical requirements of the external interface device.
推荐
Small Industrial Control Board
The STM8S103K3U6 can serve as the control core of a compact industrial board when the design requires deterministic embedded logic rather than a high-performance processor. Three timers can support timing, pulse generation, or motor-related functions, while the 10-bit ADC can monitor process inputs. The device operates from 2.95 V to 5.5 V and exposes UART, SPI, and I²C for sensors and actuators. A robust design should include transient protection, separated analog and power paths, defined reset behavior, and validation of operating temperature and environmental requirements against the exact STMicroelectronics documentation.
推荐
Battery-Powered Measurement Device
STM8S103K3U6 is appropriate for a battery-powered measurement device when low component count and flexible serial connectivity matter. Its 1 KB RAM and 8 KB Flash constrain firmware size, favoring focused acquisition, filtering, and calibration routines rather than large buffering or rich user interfaces. The EEPROM can retain configuration or calibration values, with the verified data specifying 640 bytes and 300 kcycles endurance. Power consumption, sleep behavior, analog-reference stability, and battery voltage range were not supplied in the verified data, so those parameters must be checked before claiming a specific low-power performance level.
推荐
Actuator and Relay Interface
The STM8S103K3U6 can control relays, indicators, and small actuators in a compact embedded interface because its timers and 16 I/O ports provide timing and digital control resources. UART or I²C can receive commands from a host or operator module, while the ADC can monitor a feedback or supply signal. The supply range of 2.95 V to 5.5 V is useful for mixed 3.3 V and 5 V designs, but relay drivers, flyback protection, isolation, and current limits must be added externally. Keep inductive and high-current paths away from the MCU and analog return areas to reduce switching noise and ground bounce.
推荐
Embedded Interface and Data Logger
STM8S103K3U6 is useful in a compact interface or data-logging design when measurements must be acquired and exported through a serial link. The 10-bit ADC supports sensor digitization, and the 640-byte EEPROM can retain small configuration records or calibration constants. Its 8 KB Flash and 1 KB RAM limit the amount of application code and buffering available, so designers should avoid unnecessary middleware and select an external memory solution when larger logs are required. Validate timestamp accuracy, write endurance, data integrity, and recovery behavior during power loss before using the part for safety- or compliance-critical records.
推荐
推荐产品汇总
工程参考数据： STM8S103K3U6 ——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 | STM8S103K3U6TR | STM8S105K6U6A | STM8S105K6B6 | STM8S903K3U3TR |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | UFQFPN-32, 5 x 5 mm, exposed pad | UFQFPN-32 | UFQFPN-32 | UFQFPN-32 | UFQFPN-32 |
| Program Memory | 8 KB Flash | 8 KB Flash | 32 KB Flash | 16 MHz Flash memory; exact capacity not established | 8 KB Flash |
关键差异点
- Compact mixed-signal and serial peripheral integration （对比 STM8S903K3U3TR)
- Memory footprint suitable for focused control firmware （对比 STM8S105K6U6A)
- Direct STM8S103 family ordering continuity （对比 STM8S105K6B6)
设计说明
The STM8S103K3U6 uses a 32-pin UFQFPN with an exposed pad according to the verified package descriptions. Place the exposed-pad land and thermal-via pattern exactly as required by the manufacturer package drawing, and verify the assembly process because the compact 5 x 5 mm package can create solder-bridging and voiding risks. Keep analog inputs and external communication routing away from the pad and high-current switching paths where possible.
Design the supply rail for the verified 2.95 V to 5.5 V operating range and include local decoupling close to the MCU power pins. The supplied data does not provide a recommended capacitor value, so capacitor selection must follow the current STM8S103K3 datasheet and the switching requirements of the connected peripherals. Confirm the exposed-pad electrical connection, ground return path, and regulator headroom before layout release.
Do not treat a related STM8 MPN as a replacement solely because it uses a 32-pin UFQFPN package. STM8S105K6U6A, STM8S105K6B6, and STM8S903K3U3TR differ in memory or are not fully characterized in the supplied cross-reference results. Before substitution, compare every pin, alternate function, voltage limit, reset behavior, clock setup, peripheral mapping, programming procedure, and package land pattern.
Assign UART, SPI, and I²C pins only after checking the STM8S103K3U6 alternate-function map and external interface requirements. Keep serial clock and data traces short where possible, provide series termination when driven by a long line, and separate switching or relay-control currents from the ADC return path. The 10-bit ADC is intended for suitable analog signals, but input range, source impedance, sampling time, and filtering must be verified in the manufacturer documentation.
合规信息
The supplied verified web data confirms an active lifecycle stage but does not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These values must be confirmed from current STMicroelectronics documentation.
