STMicroelectronics STM8S903F3P6, STM8S series 8-bit MCU, 16 MHz, 8 KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, 16 I/O, I²C/SPI/UART, A/D 5x10b, 2.95V–5.5V, -40°C–85°C, 20-TSSOP.
| 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 ~ 85°C (TA) |
| Speed | 16MHz |
| Package | Tray |
| RAM size | 1K x 8 |
| Core size | 8-Bit |
| EEPROM size | 640 x 8 |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | I²C, IrDA, LINbus, SPI, UART/USART |
| Number of i (O) | 16 |
| Core processor | STM8 |
| Case | 20-TSSOP (0.173\", 4.40mm Width) |
| Data converters | A/D 5x10b |
| Program memory size | 8KB (8K x 8) |
The STMicroelectronics STM8S903F3P6 is an 8-bit microcontroller from the STM8S family, built around the STM8 core and clocked at 16 MHz.
With 16 general-purpose I/O pins in a 20-TSSOP package, this MCU fits space-constrained PCBs.
The industrial temperature range also covers most consumer and appliance use cases.
The STM8S903F3P3 is the same MCU in a 20-SOIC package, while the STM8S903F3P6 comes in a 20-TSSOP package. The TSSOP variant has a narrower body width (4.40 mm vs SOIC) and a finer lead pitch, which matters for board area and assembly yield. All other specs — 16 MHz core, 8 KB Flash, 1 KB RAM, 640 B EEPROM, peripherals, and temperature range — are identical.