This datasheet describes the features and characteristics of the ATtiny48/88 series of high-performance, low-power AVR® 8-bit microcontrollers. These microcontrollers feature 123 powerful instructions, most of which are executed in a single clock cycle, 32 8-bit general purpose working registers, fully static operation, 4K/8K bytes of in-system self-programmable flash program memory (ATtiny48/88), 64/64 bytes EEPROM (ATtiny48/88), 256/512 bytes internal SRAM (ATtiny48/88), write/erase cycles: 10,000 Flash/100,000 EEPROM, data retention: 20 years at 85°C / 100 years at 25°C, optional boot code section with independent lock bits, in-system programming by on-chip boot program, true read-while-write operation, software security programming lock.