RoHS: yes. MCU circuit family: ATMEL AVR. Maximum CPU clock frequency: 8 MHz. Number of I/O: 23. Program storage memory: 8 KByte. Program storage memory type: 'FLASH' memory. Storage memory capacity: 1 KByte/512 Byte. Storage memory type: SRAM/EEPROM. Digital peripheral circuits: WDT, RTC, PWM. Digital interface circuits: UART, SPI, I2C. Analog peripheral circuits: ADC, Comparator. Minimum supply voltage (V): +2.7V. Maximum supply voltage (V): +5.5V. Operating temperature range min (°C): -40°C. Operating temperature range max (°C): +85°C. Note: 23Prg. Number of terminals: 32. Assembly/installation: surface-mounted component (SMD). Housing: TQFP. Housing (according to data sheet): TQFP-32. Operating temperature: -40...+85°C. VCC: 4.5...5.5V