ATTINY13A-SSU is AVR TINY series Microcontroller from Atmel. All the power of well known AVR controller is packed in a tiny 8 pin SMD SOIC package with 1K program memory, 4 channel 10 bit ADC, 1.8 to 5.5V operation, upto 20 MIPS speed using 20MHz external crystal. Internal clock and ISP programming support by SPI protocol. goodies not ends 2 PWM channels and a Watchdog. This powerful processor is designed for space conscious low cost and high MIPS requirement.