| Parameters | 
                                                                                                                        
                                                | Mfr | Silicon Labs | 
                                                                                    
                                                | Series | C8051T63x | 
                                                                                    
                                                | Package | Tape & Reel (TR) | 
                                                                                    
                                                | Product Status | Obsolete | 
                                                                                    
                                                | Core Processor | 8051 | 
                                                                                    
                                                | Core Size | 8-Bit | 
                                                                                    
                                                | Speed | 25MHz | 
                                                                                    
                                                | Connectivity | SMBus (2-Wire/I²C), SPI, UART/USART | 
                                                                                    
                                                | Peripherals | POR, PWM, Temp Sensor, WDT | 
                                                                                    
                                                | Number of I/O | 17 | 
                                                                                    
                                                | Program Memory Size | 2KB (2K x 8) | 
                                                                                    
                                                | Program Memory Type | OTP | 
                                                                                    
                                                | EEPROM Size | - | 
                                                                                    
                                                | RAM Size | 768 x 8 | 
                                                                                    
                                                | Voltage - Supply (Vcc/Vdd) | 1.8V ~ 3.6V | 
                                                                                    
                                                | Data Converters | A/D 16x10b; D/A 1x10b | 
                                                                                    
                                                | Oscillator Type | Internal | 
                                                                                    
                                                | Operating Temperature | -40°C ~ 85°C (TA) | 
                                                                                    
                                                | Mounting Type | Surface Mount | 
                                                                                    
                                                | Package / Case | 20-VFQFN Exposed Pad | 
                                                                                    
                                                | Supplier Device Package | 20-QFN (4x4) | 
                                                                                    
                                                | Base Product Number | C8051T634 | 
                                                                                    
                                                | RoHS Status | RoHS Compliant | 
                                                                                    
                                                | Moisture Sensitivity Level (MSL) | 1  (Unlimited) | 
                                                                                    
                                                | ECCN | EAR99 | 
                                                                                    
                                                | HTSUS | 8542.31.0001 | 
                                                                                    
                                                | Standard Package | 1,500 | 
                                                                                                                
                                
                             
                                                8051 C8051T63x Microcontroller IC 8-Bit 25MHz 2KB (2K x 8) OTP 20-QFN (4x4)