ATMEGA328P-PU PDIP-28 Microchip Technology Microcontroller

The ATmega328P microcontroller can be programmed with an Arduino UNO and then mounted on a circuit board. You can find a suitable guide at the following link:
http://www.arduino.cc/en/Tutorial/ArduinoISP

Technical Details:

• Type: ATMEGA328P-PU
  
• Manufacturer: Microchip Technology
  
• Package: PDIP-28
  
• Clock Frequency: 20 MHz
  
• Core Size: 8-Bit
  
• Number of I/O 23
  
• Core Processor: AVR
  
• Dimension: 34.79 x 7.49 x 4.07mm
  
• Weight: 2g

Package Contents:

1x ATMEGA328P-PU