STM8S103F2M6 - 8-Bit 16MHz 4KB MCU | STMicroelectronics
MPN: STM8S103F2M6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.8794 | $1.88 |
| 10 | $1.8794 | $18.79 |
| 100 | $1.8794 | $187.94 |
| 500 | $1.8794 | $939.70 |
| 1,000 | $1.8794 | $1,879.40 |
STM8S103F2M6 Overview
An 8-bit microcontroller is a compact embedded-processing device optimized for control logic, sensing, communication, and actuator management. Within the STM8S family hierarchy, this device combines an 8-bit core, Flash program memory, RAM, and on-chip peripherals in one package. The STM8S103F2M6 is suitable for low-cost, low-power industrial, consumer, appliance, instrumentation, and embedded control systems where deterministic I/O and peripheral integration are more important than high arithmetic throughput.
The headline features are a 16 MHz maximum CPU frequency, 4 KB Flash, 1 KB RAM, 16 I/O ports, and integrated EEPROM. Its 10-bit ADC enables analog measurement from basic sensors, while the three timers support timing, PWM, and periodic control functions. UART, SPI, and I2C interfaces provide flexible connectivity to sensors, displays, transceivers, memories, and other microcontrollers. The 20-pin SOIC package is suitable for conventional surface-mount assembly and hand-soldered prototypes.
The STMicroelectronics datasheet describes the STM8S103F2 family as an access-line MCU family with up to 8 KB Flash across family variants. For the specific STM8S103F2M6 ordering code, the verified distributor results specify 4 KB Flash and a 16 MHz CPU. This distinction matters because related family members may have different memory capacities, pin counts, or package options. Firmware and PCB decisions should therefore use the exact ordering code rather than relying only on the STM8S103F2 family name.
Typical applications include small motor or relay controllers, temperature and light monitoring, keypad interfaces, LED indicators, low-cost measurement instruments, communication modules, and compact household or industrial automation nodes. The ADC and communication peripherals allow a single device to acquire sensor data and connect it to a host system. For designs requiring higher processing performance or larger memory, a 32-bit MCU may be preferable, while this device is optimized for economical embedded-control tasks.
When designing, verify the exact pin assignments, alternate-function selection, clock configuration, ADC input availability, and peripheral instance mapping from the STMicroelectronics datasheet. Place decoupling capacitors close to the supply pins and keep high-current or switching nodes away from sensitive analog inputs. Program the device with a compatible STM8 toolchain and validate startup, reset, clock, and watchdog behavior on the final PCB.
This page synthesizes the verified manufacturer and distributor information, package details, application guidance, and engineering considerations for engineers evaluating the STM8S103F2M6. It emphasizes exact-ordering-code verification rather than assuming every STM8S103F2 family variant has identical resources.
Drop-in alternatives for STM8S103F2M6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM8S103F2M6 (same form factor and footprint) — differing in ADC, Communication Interfaces, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM8S103F3P6
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →STM8SPLNB1M6
✅ Drop-In📋 Reference alternative (not in catalog)
STM8S103F2M6 Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit microcontroller unit |
| Series | STM8S |
| Access Line | Access line |
| Maximum CPU Frequency | 16 MHz |
| Flash Program Memory | 4 KB |
| RAM | 1 KB |
| Integrated EEPROM | Present |
| Supply Voltage | 2.95 V to 5.5 V |
| I/O Ports | 16 |
| ADC | 10-bit |
| Timer Count | 3 |
| Communication Interfaces | UART, SPI, I2C |
| Package | 20-pin SOIC |
| Mounting Type | Surface Mount |
| Lifecycle Status | Active |
| Manufacturer | STMicroelectronics |
STM8S103F2M6 Pin Configuration
| Pin 1 | [DATA_NEEDED: pin 1 name] — [DATA_NEEDED: pin 1 description] |
| Pin 2 | [DATA_NEEDED: pin 2 name] — [DATA_NEEDED: pin 2 description] |
| Pin 3 | [DATA_NEEDED: pin 3 name] — [DATA_NEEDED: pin 3 description] |
| Pin 4 | [DATA_NEEDED: pin 4 name] — [DATA_NEEDED: pin 4 description] |
| Pin 5 | [DATA_NEEDED: pin 5 name] — [DATA_NEEDED: pin 5 description] |
| Pin 6 | [DATA_NEEDED: pin 6 name] — [DATA_NEEDED: pin 6 description] |
| Pin 7 | [DATA_NEEDED: pin 7 name] — [DATA_NEEDED: pin 7 description] |
| Pin 8 | [DATA_NEEDED: pin 8 name] — [DATA_NEEDED: pin 8 description] |
| Pin 9 | [DATA_NEEDED: pin 9 name] — [DATA_NEEDED: pin 9 description] |
| Pin 10 | [DATA_NEEDED: pin 10 name] — [DATA_NEEDED: pin 10 description] |
| Pin 11 | [DATA_NEEDED: pin 11 name] — [DATA_NEEDED: pin 11 description] |
| Pin 12 | [DATA_NEEDED: pin 12 name] — [DATA_NEEDED: pin 12 description] |
| Pin 13 | [DATA_NEEDED: pin 13 name] — [DATA_NEEDED: pin 13 description] |
| Pin 14 | [DATA_NEEDED: pin 14 name] — [DATA_NEEDED: pin 14 description] |
| Pin 15 | [DATA_NEEDED: pin 15 name] — [DATA_NEEDED: pin 15 description] |
| Pin 16 | [DATA_NEEDED: pin 16 name] — [DATA_NEEDED: pin 16 description] |
| Pin 17 | [DATA_NEEDED: pin 17 name] — [DATA_NEEDED: pin 17 description] |
| Pin 18 | [DATA_NEEDED: pin 18 name] — [DATA_NEEDED: pin 18 description] |
| Pin 19 | [DATA_NEEDED: pin 19 name] — [DATA_NEEDED: pin 19 description] |
| Pin 20 | [DATA_NEEDED: pin 20 name] — [DATA_NEEDED: pin 20 description] |
Typical Applications
STM8S103F2M6 is suitable for 7 applications: Compact Sensor Controller, Small Motor and Relay Control, Appliance Control Panel, Low-Cost Communication Module, Measurement Instrument, LED and Indicator Control, Battery-Powered IoT Node.
Compact Sensor Controller
The STM8S103F2M6 fits compact sensor nodes because its 10-bit ADC can digitize basic analog inputs while 16 I/O ports support sensors, indicators, and local control signals. At a 16 MHz maximum CPU frequency, it can service periodic sampling and communication tasks without the cost and complexity of a higher-performance MCU. The verified device also provides I2C and SPI for digital sensors, plus UART for a host or service interface. Because the available Flash is 4 KB and RAM is 1 KB, firmware should be compact, and the final design should confirm ADC channels and alternate-function pin mapping in the official datasheet.
Recommended
Small Motor and Relay Control
The STM8S103F2M6 can serve as the control brain for a small motor, relay, or solenoid node using its 16 I/O ports and three timers. Timer resources can provide periodic timing and PWM-related functions, while UART, SPI, or I2C can receive commands from a higher-level controller. The 20-pin SOIC package is practical for a small mixed-signal board, although external driver circuitry, protection, and a suitably sized supply are required for inductive loads. Validate timer channel mapping and pin multiplexing before assigning motor-control outputs.
Recommended
Appliance Control Panel
For a household or appliance control panel, the STM8S103F2M6 provides a useful combination of GPIO, timers, ADC, and serial interfaces in a 20-pin package. It can scan buttons, drive LEDs, monitor an analog temperature or level signal, and report status through UART. The 2.95 V to 5.5 V supply range supports design exploration across 3.3 V and 5 V rails, subject to the manufacturer's electrical limits. Because the exact part has only 4 KB Flash and 1 KB RAM, avoid large local UI libraries and keep the firmware architecture modular.
Recommended
Low-Cost Communication Module
The STM8S103F2M6 is suitable for a small communication endpoint where a UART, SPI, or I2C interface is needed without a high-power processor. It can act as a protocol translator, configuration controller, or bridge between a sensor and a host. The 16 MHz CPU and 3.3 V-to-5.5 V supply flexibility simplify integration into compact modules, while integrated EEPROM can support configuration data. Designers should budget RAM and Flash for the selected protocol stack, confirm electrical timing from the datasheet, and isolate communication lines where long cables or noisy industrial environments are involved.
Recommended
Measurement Instrument
The STM8S103F2M6 can be used in a compact measurement instrument when the design requires basic analog conversion, digital I/O, and a simple display or serial interface. Its 10-bit ADC supports common sensor and potentiometer inputs, while the three timers and communication peripherals help organize sampling and data transfer tasks. The 20-pin SOIC package allows straightforward surface-mount assembly and provides enough external connections for a sensor, display interface, and status controls. Final accuracy depends on the analog front end, reference arrangement, calibration method, and PCB layout, which must be designed against the manufacturer’s electrical guidance.
Recommended
LED and Indicator Control
The STM8S103F2M6 can control LED status indicators, alarm signals, and simple display logic through its GPIO and timer resources. PWM-capable timer channels may be useful for brightness or warning effects, while UART can accept commands from a system controller. The 16 I/O ports provide flexibility for button inputs, indicator outputs, and bus connections within a small package. Choose current-limiting resistors and, where required, transistor drive stages so that GPIO limits are not exceeded. The exact timer channels and alternate-function assignments should be verified for the selected 20-pin package before final routing.
Recommended
Battery-Powered IoT Node
The STM8S103F2M6 can serve as the low-power control element in a small IoT node that periodically reads sensors and wakes for communications. Its compact 8-bit architecture, GPIO, ADC, and UART are useful for simple edge nodes, while the three timers can organize sampling and periodic wake tasks. The supplied data confirms the 2.95 V to 5.5 V operating range and integrated EEPROM, but it does not provide a complete current-consumption specification. Power-budget calculations and sleep-mode behavior should therefore be taken from the manufacturer datasheet and measured on the assembled system.
Recommended
Recommended Products Summary
Engineering reference data for STM8S103F2M6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8S103F3P6 | STM8SPLNB1M6 |
|---|---|---|---|
| Device Type | 8-bit STM8S access-line microcontroller | Related STM8S microcontroller | 8-bit STM8S microcontroller |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 20-pin SOIC | Small-outline package; exact suffix requires verification | 20-pin SOIC |
Key Differentiators
- Specific 4 KB Flash configuration (vs STM8S103F3P6)
- 20-pin SOIC package (vs STM8SPLNB1M6)
- Documented peripheral integration (vs STM8SPLNB1M6)
Design Notes
Keep the STM8S103F2M6 within the verified 2.95 V to 5.5 V supply range. Use the manufacturer datasheet for exact operating-current and absolute-maximum limits. Place the required supply-bypass capacitor close to the device power pins, provide a regulator with suitable transient response, and verify reset and brownout behavior during power sequencing. The supplied data does not provide complete current-consumption limits, so do not assume a regulator rating from the CPU frequency alone.
Route high-current and switching signals away from ADC inputs and communication traces. Keep decoupling and grounding paths short, use a continuous ground reference, and place analog components near the MCU pins they serve. The 20-pin SOIC package is easy to route, but the final pin functions and alternate-function mapping must be checked in the official STM8S103F2 datasheet before assigning signals to pins.
Do not assume that every STM8S103F2 family member has the same memory or package resources. The verified ordering code specifies 4 KB Flash and a 20-pin SOIC package, while family-level descriptions can mention variants with up to 8 KB Flash. Confirm the exact suffix, memory map, pin names, clock requirements, peripheral availability, and programming tool compatibility before releasing a PCB or production firmware image.
Compliance Information
The supplied verified data does not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. These values remain unknown rather than inferred from the manufacturer or package.