Arduino Uno R3 DIP Microcontroller ATmega328

Description

Technical Specifications:

• Microcontroller: ATmega328
• Operating voltage: 5V
• Power supply voltage (recommended): 7-12V
• Maximum power supply voltage (not recommended): 20V
• Digital I / O pins: 14 (6 of which provide PWM output)
• Analog input pins: 6
• I / O pins current (5V): 40mA
• I / O pins current (3.3V): 50mA
• Flash memory: 32KB (ATmega328) of which 0.5 KB is used for bootloader
• SRAM: 2KB (ATmega328)
• EEPROM: 1KB (ATmega328)
• Operating clock: 16MHz

Physical Characteristics:

The maximum length and width of the Uno PCB are 2.7 and 2.1 inches respectively, with the USB connector and power jack extending beyond the former dimension. Four screw holes allow the board to be attached to a surface or case. Note that the distance between digital pins 7 and 8 is 160 mil (0.16″), not an even multiple of the 100 mil spacing of the other pins.