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| PartNumber | STM8S903K3T6C | STM8S903K3T6CTR | STM8S903K3T6C LQFP32 |
| Description | 8-bit Microcontrollers - MCU Performance LN 8-Bit 24 MHz STM8S MCU | 8-bit Microcontrollers - MCU 8BIT Ultralow MCU 8KB Flash 1KB RAM | |
| Manufacturer | STMicroelectronics | STMicroelectronics | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | LQFP-32 | LQFP-32 | - |
| Series | STM8S903K3 | STM8S903K3 | - |
| Core | STM8 | STM8 | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 16 MHz | 16 MHz | - |
| Program Memory Size | 8 kB | 8 kB | - |
| Data RAM Size | 1 kB | 1 kB | - |
| ADC Resolution | 10 bit | 10 bit | - |
| Number of I/Os | 28 I/O | 28 I/O | - |
| Operating Supply Voltage | 2.95 V to 5.5 V | 2.95 V to 5.5 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Tray | Reel | - |
| Height | 1.4 mm | - | - |
| Length | 7 mm | - | - |
| Program Memory Type | Flash | Flash | - |
| Width | 7 mm | - | - |
| Brand | STMicroelectronics | STMicroelectronics | - |
| Data RAM Type | RAM | RAM | - |
| Data ROM Size | 640 B | 640 B | - |
| Data ROM Type | EEPROM | EEPROM | - |
| Interface Type | I2C, SPI, UART | I2C, SPI, UART | - |
| Moisture Sensitive | Yes | Yes | - |
| Number of ADC Channels | 7 | 7 Channel | - |
| Number of Timers/Counters | 7 Timer | 2 x 16 bit, 1 x 8 bit | - |
| Processor Series | STM8S90x | STM8S | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 1500 | 2400 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 2.95 V | 2.95 V | - |
| Unit Weight | 0.027302 oz | 0.006349 oz | - |
| Product | - | MCU | - |
| Watchdog Timers | - | Watchdog Timer | - |