| Program Memory Type | Flash |
| Maximum Expanded Memory Size | 64KB |
| Data Bus Width (bit) | 8 |
| SPI | 1 |
| Analog Comparators | 2 |
| Special Features | Programmable Counter Array |
| Supplier Package | TQFP |
| Instruction Set Architecture | CISC |
| Core Architecture | 8051 |
| Family Name | C8051F12x |
| Maximum Operating Supply Voltage (V) | 3.6 |
| Maximum Clock Rate (MHz) | 100 |
| EU RoHS | Compliant |
| PWM | 1 |
| Supplier Temperature Grade | Industrial |
| DAC Channels | 2 |
| Standard Package Name | QFP |
| Pin Count | 100 |
| Mounting | Surface Mount |
| USART | 0 |
| CAN | 0 |
| Lead Shape | Gull-wing |
| Ethernet | 0 |
| Packaging | Tape and Reel |
| Program Memory Size | 128KB |
| Typical Operating Supply Voltage (V) | 3.3 |
| Number of DACs | Single |
| Programmability | Yes |
| PCB changed | 100 |
| ECCN (US) | EAR99 |
| DAC Resolution (bit) | 12 |
| Device Core | 8051 |
| ADC Channels | 8/8 |
| Minimum Operating Temperature (°C) | -40 |
| Maximum Operating Temperature (°C) | 85 |
| No. of Timers | 5 |
| Package Height | 1 |
| I2C | 1 |
| Interface Type | I2C/SMBus/SPI/UART |
| Maximum CPU Frequency (MHz) | 100 |
| Number of ADCs | Dual |
| USB | 0 |
| RAM Size | 8.25KB |
| UART | 2 |
| ADC Resolution (bit) | 8/12 |
| I2S | 0 |
| Package Length | 14 |
| CECC Qualified | No |
| Watchdog | 1 |
| Number of I/Os | 64 |
| Package Width | 14 |
| Minimum Operating Supply Voltage (V) | 3 |
