| Parameters | 
                                                                                                                        
                                                | Mfr | Atmel | 
                                                                                    
                                                | Series | 8x251 | 
                                                                                    
                                                | Package | Bulk | 
                                                                                    
                                                | Product Status | Active | 
                                                                                    
                                                | Core Processor | C251 | 
                                                                                    
                                                | Core Size | 8/16-Bit | 
                                                                                    
                                                | Speed | 24MHz | 
                                                                                    
                                                | Connectivity | EBI/EMI, I²C, Microwire, SPI, UART/USART | 
                                                                                    
                                                | Peripherals | POR, PWM, WDT | 
                                                                                    
                                                | Number of I/O | 32 | 
                                                                                    
                                                | Program Memory Size | - | 
                                                                                    
                                                | Program Memory Type | ROMless | 
                                                                                    
                                                | EEPROM Size | - | 
                                                                                    
                                                | RAM Size | 1K x 8 | 
                                                                                    
                                                | Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 
                                                                                    
                                                | Data Converters | - | 
                                                                                    
                                                | Oscillator Type | Internal | 
                                                                                    
                                                | Operating Temperature | -40°C ~ 85°C (TA) | 
                                                                                    
                                                | Mounting Type | Surface Mount | 
                                                                                    
                                                | Package / Case | 44-LQFP | 
                                                                                    
                                                | Supplier Device Package | 44-VQFP (10x10) | 
                                                                                    
                                                | Base Product Number | AT80251G2D | 
                                                                                    
                                                | RoHS Status | ROHS3 Compliant | 
                                                                                    
                                                | Moisture Sensitivity Level (MSL) | 3  (168 Hours) | 
                                                                                    
                                                | REACH Status | REACH Unaffected | 
                                                                                    
                                                | ECCN | EAR99 | 
                                                                                    
                                                | HTSUS | 8542.31.0001 | 
                                                                                    
                                                | Standard Package | 1 | 
                                                                                                                
                                
                             
                                                C251 8x251 Microcontroller IC 8/16-Bit 24MHz ROMless 44-VQFP (10x10)