Silicon Laboratories C8051F351 Connectivity: SMBus (2-Wire/I??C), SPI, UART/USART Core Processor: 8051 Core Size: 8-Bit Data Converters: A/D 8x24b; D/A 2x8b Eeprom Size: - Number Of I /o: 17 Operating Temperature: -40?°C ~ 85?°C Oscillator Type: Internal Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN Peripherals: POR, PWM, Temp Sensor, WDT Program Memory Size: 8KB (8K x 8) Program Memory Type: FLASH Ram Size: 768 x 8 Series: C8051F35x Speed: 50MHz Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V