The STMicroelectronics STM8S207SBT3C is an 8-bit MCU from the STM8S family, built around the STM8 core running at 24 MHz.
Peripherals and I/O — what is on board
34 I/O lines are available on the 44-LQFP package, along with a 9-channel 10-bit ADC.
ST STM8S207SBT3C 8-bit MCU, 24 MHz, 128 KB Flash, 44-LQFP
MPNSTM8S207SBT3C
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STMicroelectronics STM8S207SBT3C, STM8S series 8-bit MCU, 24 MHz core, 128 KB Flash, 6K x 8 RAM, 2K x 8 EEPROM, 44-LQFP (10x10 mm), -40°C to 125°C, 2.95 V to 5.5 V supply.
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Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Series | STM8S |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 2.95V ~ 5.5V |
| Operating temperature | -40°C ~ 125°C (TA) |
| Speed | 24MHz |
| Package | Tray |
| RAM size | 6K x 8 |
| Core size | 8-Bit |
| EEPROM size | 2K x 8 |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | I²C, IrDA, LINbus, SPI, UART/USART |
| Number of i (O) | 34 |
| Core processor | STM8 |
| Case | 44-LQFP |
| Data converters | A/D 9x10b |
| Program memory size | 128KB (128K x 8) |
Product details
Frequently asked questions
What is the maximum speed of STM8S207SBT3C?
The STM8S207SBT3C runs at 24 MHz. That is the core clock speed, which sets the timing budget for control-loop execution and UART baud-rate generation.
Is STM8S207SBT3C obsolete?
No.
What package does STM8S207SBT3C come in?
It is supplied in a 44-LQFP package with a 10x10 mm body. That is a surface-mount, fine-pitch quad flat pack with 44 leads.
What is the RAM and EEPROM size of STM8S207SBT3C?
6 KB of SRAM (6K x 8) and 2 KB of EEPROM (2K x 8). The EEPROM is useful for calibration constants or configuration data that must survive a power cycle without wearing the Flash.
Is STM8S207SBT3C compatible with STM8S207S6?
Both are STM8S207-series parts in the same 44-LQFP footprint, so they are pin-compatible. The SBT3C carries 128 KB Flash versus the S6's smaller memory, so a firmware migration would need to account for the density difference.