| Installation type | Through-Hole |
| packing | pipe |
| series | 8x251 |
| Part status | stop production |
| Memory type | ROMless |
| speed | 24MHz |
| Voltage - Supply | 4.5V ~ 5.5V |
| working temperature | -40°C ~ 85°C(TA) |
| Encapsulation/Housing | 40-DIP(0.600,15.24mm) |
| Country of origin | USA |
| Warehouse | China/Hong Kong |
| quality | Original genuine |
| Number of cores | 8/16-bit |
| Core processor | C251 |
| Connectivity | EBI/EMI,I²C,Microwire,SPI,UART/USART |
| peripheral | POR,PWM,WDT |
| Number of I/Os | 32 |
| RAM size | 1K x 8 |
| Oscillator type | Inside |