Manufacturer: Silicon Laboratories Inc  •  RoHS/pb-free: RoHS   Pb-free  •  Series: C8051F57x  •  Core Processor: 8051  •  Core Size: 8-Bit  •  Speed: 50MHz  •  Connectivity: EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART  •  Peripherals: POR, PWM, Temp Sensor, WDT  •  Number of I /O: 33  •  Program Memory Size: 16KB (16K x 8)  •  Program Memory Type: FLASH  •  RAM Size: 2.25K x 8  •  Voltage - Supply (Vcc/Vdd): 1.8 V ~ 5.25 V  •  Data Converters: A/D 32x12b  •  Oscillator Type: Internal  •  Operating Temperature: -40°C ~ 125°C  •  Package / Case: 40-QFN  •  Other PartNo: 336-1716-5