STM8S003F3P6TR is an 8-bit microcontroller designed for general-purpose embedded control applications. It combines a 16 MHz STM8 CPU core with 8 KB Flash program memory, 1 KB RAM, 128 bytes of data EEPROM and multiple integrated peripherals.
The device uses a TSSOP-20 surface-mount package and is suitable for applications where a compact, low-cost microcontroller is needed for control, monitoring, sensing and communication functions.
STM8S003F3P6TR features a 16 MHz STM8 core with a Harvard architecture and three-stage pipeline.
The MCU includes 8 KB of Flash memory for application firmware, 1 KB of RAM for runtime operations and 128 bytes of integrated data EEPROM for storing configuration parameters and other non-volatile information.
It operates from a supply voltage of 2.95 V to 5.5 V and supports an operating temperature range of approximately -40°C to +85°C.
The integrated peripheral set includes timers, ADC, UART, SPI and I²C, allowing the MCU to handle many functions without additional controller ICs.
The STM8S003F3P6TR belongs to the STM8S003F3 value-line family.
This family is designed for applications that need basic microcontroller functionality while keeping the overall system architecture relatively simple.
The 8-bit STM8 core is suitable for tasks such as reading sensors, processing control inputs, managing displays, controlling outputs and communicating with peripheral devices.
For small embedded products, the combination of integrated memory and peripherals can reduce component count and PCB complexity.
The 8 KB Flash memory provides space for the application program.
It can be used for firmware containing control algorithms, communication routines, sensor processing, timing functions and system-management logic.
For simple embedded applications, 8 KB can provide sufficient program space while avoiding the additional cost and complexity of a larger microcontroller.
The Flash memory also supports the development and programming workflow required for embedded products.
STM8S003F3P6TR includes 1 KB of RAM for variables, stack operations, temporary calculations and communication buffers.
The MCU also provides 128 bytes of true data EEPROM.
EEPROM can be used for information that needs to remain stored after the system is powered off. Examples include calibration values, operating parameters, device settings and user configuration data.
This integrated non-volatile memory eliminates the need for an external EEPROM in many small control applications.
The integrated 10-bit ADC provides a convenient way to process analog signals.
It can be used to measure sensor outputs, potentiometer positions, supply voltage levels and other analog inputs.
A microcontroller with an integrated ADC can simplify the hardware design because an additional external analog-to-digital converter is not required for many basic measurement applications.
The ADC can also work together with the MCU's firmware to monitor system conditions and trigger control actions when an input reaches a defined level.
STM8S003F3P6TR includes several timer peripherals.
The timers can generate periodic interrupts, measure external signals, control timing operations and produce PWM signals.
PWM is useful for applications such as LED brightness control, fan control, actuator control and basic motor-control systems.
The advanced-control timer also provides functions suitable for more demanding control applications, including complementary outputs and dead-time insertion.
Communication is an important part of many embedded systems.
STM8S003F3P6TR integrates UART, SPI and I²C interfaces, providing several options for connecting external devices.
UART can be used for serial communication, configuration and debugging.
SPI can connect the MCU to displays, sensors, memory devices and other high-speed peripherals.
I²C provides a two-wire interface for connecting multiple compatible devices while using relatively few MCU pins.
The TSSOP-20 version provides up to 16 general-purpose I/O pins depending on peripheral configuration.
GPIO pins can be used to connect buttons, LEDs, switches, sensors, relays and other external circuits.
Many pins support multiple functions, allowing them to operate as GPIO or as part of the ADC, timer and communication peripherals.
Pin allocation should therefore be planned during the hardware design stage to prevent conflicts between different peripheral functions.
STM8S003F3P6TR uses a 20-pin TSSOP package.
The package provides a compact surface-mount solution while maintaining a conventional leaded package structure.
TSSOP-20 can be useful for products where PCB space is limited but straightforward assembly and inspection are still important.
The package also makes STM8S003F3P6TR different from other STM8S003F3 variants using smaller QFN-style packages.
For replacement applications, the package and PCB footprint should be checked carefully before selecting another STM8S003F3 device.
STM8S003F3P6TR can be used in many embedded control applications.
Typical applications include household appliances, industrial control boards, sensor modules, LED controllers, power-management equipment, small automation systems and consumer electronics.
It can also be used in products that require basic motor control, analog monitoring or communication between multiple electronic modules.
The integrated peripherals allow a single MCU to manage several functions that might otherwise require separate ICs.
The integrated timers and PWM outputs make STM8S003F3P6TR suitable for basic motor-control applications.
The MCU can generate a PWM signal to an external motor driver or power transistor while monitoring feedback through GPIO or ADC inputs.
For example, a sensor signal can be converted through the ADC and processed by firmware to adjust the PWM duty cycle.
This approach can provide closed-loop control without requiring a more powerful microcontroller for relatively simple applications.
The MCU can also perform basic power-management functions.
The ADC can monitor supply voltage or other analog parameters, while GPIO pins can control external switching devices.
The MCU includes low-power operating modes that can reduce power consumption when continuous processing is not required.
This makes the device suitable for equipment that needs to monitor a system condition and activate a control function only when necessary.
STM8S003F3P6TR includes the SWIM single-wire interface for programming and debugging.
This interface allows firmware to be programmed into the MCU and supports debugging during development.
Using an integrated programming and debugging interface simplifies the development process and avoids the need for a large number of dedicated programming connections.
This is especially useful for compact embedded boards where PCB space is limited.
The MCU supports a 2.95 V to 5.5 V supply range.
This gives designers flexibility when developing systems around common 3.3 V and 5 V power rails.
The actual supply configuration should be selected according to the MCU requirements and the voltage requirements of connected peripherals.
When the MCU communicates with external devices, the logic-level compatibility of both sides should also be considered.
When selecting an STM8S003F3P6TR replacement, the basic electrical specifications should be matched rather than selecting another MCU based only on the STM8 name.
Important parameters include Flash memory, RAM, EEPROM, operating voltage, ADC channels, timers, communication interfaces and GPIO configuration.
The package is also critical for a direct replacement.
STM8S003F3P6TR uses a TSSOP-20 package, so a replacement using a different package may require PCB modifications even when the MCU functions are similar.
Firmware compatibility should also be considered when replacing an existing MCU.
STM8S003F3P6TR and STM8S003F3U6TR are closely related members of the STM8S003F3 family.
Their core architecture, memory configuration and major peripheral functions are similar, but the package is different.
STM8S003F3P6TR uses TSSOP-20, while STM8S003F3U6TR uses a 20-pin UFQFPN package.
This difference is important when selecting a replacement because the two devices cannot simply be treated as drop-in mechanical equivalents.
For a new design, the TSSOP-20 version can be convenient when assembly and inspection are priorities, while the UFQFPN version can provide a smaller PCB footprint.
STM8S003F3P6TR combines a 16 MHz 8-bit STM8 core, 8 KB Flash, 1 KB RAM, 128-byte EEPROM, 10-bit ADC, multiple timers and UART, SPI and I²C interfaces in a TSSOP-20 package.
This combination makes it a practical choice for cost-sensitive embedded applications that require basic processing, analog measurement, timing and communication functions.
For new designs, engineers should evaluate memory requirements, GPIO allocation, peripheral configuration, operating voltage and package dimensions together. For replacement projects, the complete electrical specifications, pin configuration and package footprint should be checked before selecting an alternative.
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