Microchip Manufacturer 8-bit Microcontrollers - MCU Product Category SMD/SMT Mounting Style TQFP-64 Package / Case ATmega64A Series AVR Core 8 bit Data Bus Width 16 MHz Maximum Clock Frequency 64 kB Program Memory Size 4 kB Data RAM Size 53 I/O Number of I/Os 2.7 V 5.5 to V Operating Supply Voltage - 40 C Minimum Operating Temperature + 85 C Maximum Operating Temperature Tray Packaging 1 mm Height 14 mm Length MCU Product Flash Program Memory Type 14 mm Width Microchip Technology / Atmel Brand SRAM Data RAM Type 2 kB Data ROM Size EEPROM Data ROM Type SPI, USART Interface Type Yes Moisture Sensitive 4 Timer Number of Timers/Counters megaAVR Processor Series 8-bit Microcontrollers - MCU Product Type AVR Tradename