ST STM8S103K3B6, STM8S series 8-bit MCU, STM8 core, 16 MHz, 8 KB Flash, 1K x 8 RAM, 640 x 8 EEPROM, SDIP-32, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Series | STM8S |
| Mounting | Through Hole |
| 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) | 28 |
| Core processor | STM8 |
| Case | 32-SDIP (0.400\", 10.16mm) |
| Data converters | A/D 4x10b |
| Program memory size | 8KB (8K x 8) |
The STM8S103K3B6 is an 8-bit microcontroller from the STM8S value-line family, built around the STM8 core running at 16 MHz. The through-hole package suits prototype runs or low-volume production.
The core runs at 16 MHz maximum.
Four 10-bit ADC channels handle analog inputs.
Supply range is 2.95 V to 5.5 V. 28 I/O pins are available.
Yes, ST has marked this part as obsolete. No further factory production is planned. The part is available through surplus and independent distribution channels, sourced to order against an RFQ.
ST does not list a direct pin-compatible successor for this exact order code. For a new design, consider the active STM8S103K3T6 (same core, Flash, and RAM in a TQFP-32 package) or a higher-density STM8S105/STM8S207 variant if you need more Flash or I/O. Verify pinout and package compatibility before substituting.
The STM8S103K3T6 shares the same core, memory, and peripheral set but comes in a TQFP-32 package instead of the SDIP-32. They are not pin-compatible due to the different package footprint, so a board redesign is required.
This obsolete part is sourced through independent distribution. We quote it to order against an RFQ — availability and current pricing are confirmed at quote time. Submit an RFQ for a binding offer.
The pinout is documented in the STM8S103K3 datasheet. The SDIP-32 package provides 28 I/O, plus power, ground, and oscillator pins. The exact pin functions (including the 4x10-bit ADC channels and serial interfaces) are listed in the datasheet's pin assignment table.
The core runs at 16 MHz maximum.