STMicroelectronics STM8S105K6U3A
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $3.99 | $3.99 |
| 15+ | $2.62 | $39.30 |
| 25+ | $2.57 | $64.25 |
| 50+ | $2.42 | $121.00 |
| 100+ | $2.14 | $214.00 |
| N+ | $0.43 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | STMicroelectronics |
| Product Series | STM8S |
| Packaging | Tray | NULL |
| Core Processor | STM8A |
| Core Size | 8-Bit |
| Speed | 16MHz |
| Connectivity | I2C, IrDA, LINbus, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 25 |
| Program Memory Size | 32KB (32K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | 1K x 8 |
| RAM Size | 2K x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.95V ~ 5.5V |
| Data Converters | A/D 7x10b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Grade | - |
| Qualification AEC | - |
| Mounting Type | Surface Mount |
| Supplier Device Package | 32-UFQFPN (5x5) |
| Package / Case | 32-UFQFN Exposed Pad |
| ROHS |
The STM8S105K6U3A from STMicroelectronics is a high-reliability 8-bit MCU built on the STM8A core. It delivers 16 MHz performance with 32KB flash and 2KB RAM. The device integrates brown-out detection, POR, PWM, and WDT, ensuring robust operation in industrial and automotive settings. Its 2.95V to 5.5V supply range and wide temperature tolerance make it a versatile choice for demanding embedded control.
- Extended temperature range (-40°C to 125°C) – verified for automotive and industrial stress conditions.
- Integrated WDT and brown-out reset – prevents system corruption during power glitches.
- 16 MHz STM8A core – efficient 8-bit processing with low interrupt latency.
- 5.5V tolerant supply – simplifies direct connection to unregulated power sources.
Industrial Sensor Nodes
With a 16 MHz STM8A core and 32KB flash, it can handle sensor fusion algorithms while maintaining low power in 2.95V-5.5V systems.
Automotive Body Control Modules
The -40°C to 125°C range and robust brown-out reset make it reliable for door locks, window lifts, and lighting control.
Power Tool Controllers
PWM outputs and WDT ensure safe motor commutation and fault recovery in high-vibration environments.
Smart Meters
2K RAM and 32KB flash are sufficient for metrology calculations and communication protocol stacks.
HVAC Actuators
Integrated POR and WDT prevent lockups in valve and damper control loops, ensuring fail-safe operation.
Portable Medical Monitors
The 5.5V max supply allows direct battery connection, while the small UFQFN package fits wearable form factors.
- Q: What is the operating voltage range of the STM8S105K6U3A?
- A: It operates from 2.95V to 5.5V, making it suitable for industrial and automotive power rails.
- Q: What is the maximum clock speed?
- A: The core runs at up to 16 MHz, providing balanced performance for control applications.
- Q: Does it include a watchdog timer?
- A: Yes, it features a WDT along with POR and brown-out reset for reliable operation.
- Q: What package is available?
- A: It comes in a 32-UFQFN exposed pad package, ideal for compact PCB designs.
- Q: What is the temperature range?
- A: It is rated for -40°C to 125°C, suitable for harsh environments.
- Q: What is the operating voltage range of the STM8S105K6U3A?
- A: It operates from 2.95V to 5.5V, making it suitable for industrial and automotive power rails.
- Q: What is the maximum clock speed?
- A: The core runs at up to 16 MHz, providing balanced performance for control applications.
- Q: Does it include a watchdog timer?
- A: Yes, it features a WDT along with POR and brown-out reset for reliable operation.
- Q: What package is available?
- A: It comes in a 32-UFQFN exposed pad package, ideal for compact PCB designs.
- Q: What is the temperature range?
- A: It is rated for -40°C to 125°C, suitable for harsh environments.

STM8S105K6U3A.pdf