Attiny 8 bit avr microcontrollers atmel attiny25 20pu low power avr 8 bit microcontroller attiny family 27v to 55v supply voltage 2kb flash memory 128bytes eeprom memory 128bytes sram data memory 6 io pins 4ch x 10bit adc channels 1 timers 2 pwm channels 20mhz clock speed usi interfaces 8 dip case high performance low power avr 8 bit microcontroller advanced risc architecture high endurance non volatile memory segments debugwire on chip debug system in system programmable