STM8S103K3T6C - 16MHz 8KB 8-Bit MCU | STMicroelectronics
MPN： STM8S103K3T6C ✓ 啟用中STM8S103K3T6C 概覽
An 8-bit microcontroller is a programmable semiconductor that executes instructions from a fixed-width instruction set and uses embedded Flash, RAM, and peripherals to control a product. Within the broader hierarchy, this STM8S device belongs to the microcontroller, embedded processor, and semiconductor categories. It is intended for applications that require economical local control, mixed analog and digital measurement, and standard serial connectivity without a high-performance processor.
The principal features of the STM8S103K3T6C include 16 MHz maximum clock operation, 8 KB of Flash memory, 640 bytes of EEPROM, 28 I/O lines, and four 10-bit ADC channels. Its integrated communications peripherals support UART, SPI, and I2C, while three timers provide timing, input capture, output compare, or basic PWM resources. The 2.95 V to 5.5 V operating range supports common 3.3 V and 5 V embedded systems.
The STM8S access-line architecture combines an 8-bit CPU with integrated analog and serial peripherals on a single package. This integration reduces the component count for embedded control boards by placing analog conversion, nonvolatile data storage, and communication interfaces beside the processor. Flash retains firmware after power removal, while true data EEPROM supports parameter storage that can be updated independently of the program area.
Typical uses include compact industrial controllers, sensor-interface modules, appliance controls, communication adapters, motor and relay-control boards, and cost-sensitive consumer products. The UART is useful for host diagnostics, the SPI interface supports faster peripheral expansion, and the I2C interface accommodates sensors and serial EEPROMs. The ADC enables analog voltage measurement when the application requires 10-bit resolution.
PCB design should preserve clean grounding, short analog-signal paths, and appropriate decoupling near the device. Confirm the exact pin assignments, alternate-function routing, clock configuration, and analog-input limits in the manufacturer datasheet before layout release. Software designers should also account for the limited 8 KB program area when organizing drivers, communications routines, and application logic.
This product page combines manufacturer specifications, package information, sourcing guidance, same-footprint alternatives, comparison parameters, and practical implementation notes. It helps engineers evaluate the STM8S103K3T6C against related 32-pin LQFP devices while preserving attention to memory capacity, peripheral availability, and package-level replacement risks.
直接替換替代品，適用於 STM8S103K3T6C — 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： STM8S103K3T6C （相同外形與佔位） — 差異在於 ADC Resolution, Flash Program Memory, Operating Temperature Range, Serial Interfaces, Supply Voltage Range.
STM8S105K4T6C
✅ 直接替換聯絡詢價
查看資料表 →STM8S903K3T6C
✅ 直接替換聯絡詢價
查看資料表 →STM8S003K3T6CTR
✅ 直接替換📋 參考替代品（不在目錄中）
STM8S103K3T6C 最大額定值與電氣特性
| Product Type | 8-bit microcontroller |
| Product Series | STM8S access line |
| Maximum Clock Speed | 16 MHz |
| Flash Program Memory | 8 KB (8K x 8) |
| Data EEPROM | 640 x 8 bits |
| ADC Resolution | 10 bits |
| ADC Channel Count | 4 channels |
| Timer Count | 3 timers |
| Serial Interfaces | UART, SPI, and I2C |
| I/O Port Count | 28 I/O lines |
| Supply Voltage Range | 2.95 V to 5.5 V |
| 工作溫度範圍 | -40 °C to +85 °C |
| Package Type | 32-pin LQFP |
| 安裝方式 | Surface mount |
| Core Processor | STM8 8-bit processor |
| Program Memory Type | Flash |
| 生命週期狀態 | Active |
| RoHS Compliance | RoHS3 compliant |
| REACH Compliance | Unknown |
STM8S103K3T6C 32-pin lqfp 腳位配置指南
STM8S103K3T6C（32-pin lqfp 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： STM8S103K3T6C.
請參閱 資料表 以查看完整腳位配置。
典型應用
STM8S103K3T6C 適用於 6 應用s: Compact Industrial Sensor Interface, Appliance Control Board, Communication Protocol Converter, Cost-Sensitive Consumer Controller, Motor and Relay Control, Programmable Data Logger.
Compact Industrial Sensor Interface
The STM8S103K3T6C is well suited to a compact sensor interface because it combines a four-channel 10-bit ADC with a 16 MHz 8-bit core and 28 I/O lines. A controller can sample analog inputs, apply filtering or threshold logic, and expose measurements through UART or SPI without relying on an external converter. Its 2.95 V to 5.5 V operating range supports both 3.3 V and 5 V industrial boards, while 8 KB of Flash accommodates focused firmware. Keep analog traces short, separate from switching nodes, and verify the datasheet requirements for analog pins and reference voltage.
推薦
Appliance Control Board
For appliances, the STM8S103K3T6C can coordinate buttons, indicators, relays, and a small number of analog inputs in one 32-pin LQFP device. Three timers support repetitive timing tasks, while UART provides a path for configuration or diagnostics, and the 10-bit ADC can monitor a sensor or control signal. The 8 KB Flash limit favors compact, well-structured firmware rather than large graphical interfaces. Validate timing behavior at the intended supply voltage and account for inductive loads, surge events, and grounding outside the microcontroller package.
推薦
Communication Protocol Converter
The STM8S103K3T6C can serve as a small protocol-conversion node because it provides UART, SPI, and I2C interfaces alongside a 16 MHz processor. Firmware can translate messages between a host serial port and an SPI sensor or I2C peripheral while local timers support periodic sampling. Its true data EEPROM can retain configuration values, and the 8 KB Flash program area is adequate for narrowly defined converters. For production designs, verify pin remapping, peripheral clock setup, bus timing, and firmware interrupt requirements against the STM8S103 family documentation.
推薦
Cost-Sensitive Consumer Controller
The STM8S103K3T6C supports cost-sensitive consumer products where a low-power 8-bit controller, local analog measurement, and serial connectivity are sufficient. A product such as a small accessory, controller, or configurable display product can use the four-channel 10-bit ADC for simple sensing and UART for configuration. The 2.95 V to 5.5 V supply range accommodates common system rails, while the 32-pin LQFP provides more interface options than a minimal controller package. Final selection should consider standby behavior, code size, production programming, and the required operating-temperature grade.
推薦
Motor and Relay Control
The STM8S103K3T6C can implement basic motor, solenoid, or relay sequencing where timing precision and communication outweigh high-performance control requirements. Its three timers can organize pulse, capture, or compare functions, and its 28 I/O lines provide room for control outputs and status inputs. The ADC can monitor a feedback voltage when suitable analog circuitry is added. Designers should keep motor-current paths away from sensitive traces, use appropriate driver and protection components, and confirm timer output behavior at the intended 2.95 V to 5.5 V operating range.
推薦
Programmable Data Logger
A small data logger can use the STM8S103K3T6C to acquire periodic sensor readings through its four-channel 10-bit ADC and store configuration or records in its 640 x 8-bit true data EEPROM. The UART can transfer logs to a host, and timers can establish fixed acquisition intervals. The 8 KB Flash limit requires a focused firmware design, while EEPROM write endurance must be respected for frequently changing records. Determine the required logging rate and retention duration before choosing this device, and follow the datasheet limits for supply voltage, write cycles, and ADC operation.
推薦
推薦產品摘要
工程參考資料，適用於 STM8S103K3T6C — 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 | STM8S105K4T6C | STM8S903K3T6C | STM8S003K3T6CTR |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 32-pin LQFP | 32-pin LQFP | 32-pin LQFP | 32-pin LQFP |
| Product Family | STM8S103 access line | STM8S105 | STM8S903 | STM8S003 |
| Flash Program Memory | 8 KB (8K x 8) | 32 KB | 8 KB | 8 KB |
主要差異化特點
- Provides true data EEPROM alongside Flash (對比STM8S003K3T6CTR)
- Combines three timer blocks with a four-channel 10-bit ADC (對比STM8S903K3T6C)
- Uses only 8 KB of Flash for a focused embedded footprint (對比STM8S105K4T6C)
設計說明
Place the device's supply decoupling capacitors directly beside the appropriate power and ground pins, using the capacitance and placement guidance in the STM8S103 family datasheet. Route the 16 MHz clock circuit away from ADC inputs and switching edges. Confirm that every used alternate-function pin is mapped correctly in the 32-pin LQFP footprint, because GPIO, timer, UART, SPI, I2C, and analog functions can share physical pins.
Keep analog inputs short and treat the ADC reference as a precision node. Place any required reference or filtering components close to the controller, avoid routing ADC traces parallel to high-current switching paths, and provide a quiet ground reference. The four-channel 10-bit ADC is adequate for many sensor readings, but measurement accuracy still depends on source impedance, reference quality, acquisition time, and the PCB return path.
Design the 2.95 V to 5.5 V supply rail so it remains within operating limits during startup, load changes, and external-interface activity. Apply the manufacturer’s recommended capacitor network and voltage tolerances. In battery-powered equipment, calculate the average and peak current required by the 16 MHz core, ADC, timers, and communications, then confirm that the power source can maintain the chosen rail without excessive droop.
Do not assume that a 32-pin LQFP alternative is a drop-in replacement solely because its footprint and memory capacity look similar. Check alternate-function assignments, supply limits, ADC channels, timer resources, serial peripherals, EEPROM behavior, reset pins, clock pins, and interrupt mappings. Firmware should also be rebuilt and tested for the selected alternative because peripheral behavior and register mappings can differ between STM8 subfamilies.
合規資訊
The component listing identifies RoHS3 compliance. REACH, AEC-Q100 qualification, lead-free status, halogen-free status, and conflict-minerals status are not established by the available product information.