Atmel ATTINY13A-PU is AVR TINY series 8pin DIP microcontroller, packed with high performance, low power 8 bit Advanced RISC Architecture. Its operational Voltage limit is 1.8V to 5.5V. It has 20 MHz CPU Clock, 6 general purpose I/O lines, 1KB ISP flash memory, 64B EEPROM, 60-Byte RAM. It has 1 timer, 2 PWM Channel, 4 Channel ADC inputs and a Watchdog. Operational Temperature range of this microcontroller is -40 to 85 degree C. Internal clock and ISP programming support by SPI protocol. Being small in size and DIP, it is particularly suitable for bread board applications and prototype development.