Features: 100% Brand new and high quality Atmel 39;s ATMega328 8-Bit Processor in 28 pin DIP package. It 39;s like the ATmega168, with double the flash space. 32K of program space. 23 I/O lines, 6 of which are channels for the 10-bit ADC. Runs up to 20MHz with external crystal. Package can be programmed in circuit. 1.8V to 5V operating voltage To get this chip working with IDE, you will need an external 16MHz crystal or resonator, a 5V supply, and a serial connection. Product Properties: Brand:no Can be customized:no Specifications: Quantity: 1 piece Number of Pins: 28 Architecture: 8-bit Op.Temperature:-40 ~ 85C Series: ATMega Note: Only an ATmega328 in DIP package, without the optiboot bootloader pre-loaded. You have to use code in your custom embedded project. Package includes: 1 X 8-Bit Micro Controller Microcontroller ATmega328P-PU