This Model: ATMEGA328P-PUMCU 8BIT AVR 32K FLASH 28PDIPCPU Speed:20MHzController Family/Series:AVR MEGACore Size:8bitDigital IC Case Style:DIPEEPROM Memory Size:1KBEmbedded Interface Type:I2C SPI USARTNo. of I/O"s:23No. of PWM Channels:6No. of Pins: 28No. of Timers:3Operating Temperature Range:-40?°C to +85?°COscillator Type:External InternalPeripherals:ADC Comparator RTCProgram Memory Size:32 KBRAM Memory Size:2KBSVHC:No SVHC (19-Dec-2011)Supply Voltage Range:1.8V to 5.5VBase Number:megaAVRClock Frequency:20MHzDevice Marking:ATMEGA328P-PUFlash Memory Size:32KBIC Generic Number:328Interface:I2C Serial SPI USART 2-WireInterface:I2C SPI USARTInterface Type:I2C SPI USARTLogic Function Number:328No. of ADC Inputs:6No. of I/O"s:23Package / Case:PDIPProgram Memory Size:32KBSupply Voltage Max:5.5VSupply Voltage Min:1.8VTermination Type:Through Hole