Atmega 8 bit avr microcontrollers atmel atmega168 20pu low power avr 8 bit microcontroller atmega family 27v to 55v supply voltage 16kb flash memory 512bytes eeprom memory 1kb sram data memory 28 io pins 6ch x 10bit adc channels 2 timers 6 pwm channels 20mhz clock speed serial 2 wire spi usart interfaces 28 dip case high performance low power avr 8 bit microcontroller advanced risc architecture high endurance non volatile memory segments power on reset and programmable b