This page is intended to show the outline of the chip and to provide additional information that might not be clear from the data sheet.
Read the generic info about Xtiny , MEGAX and AVRX
The AVR64DA28 comes in 28 pin SPDIP, SSOP and SOIC. It has 64KB of flash and 28 pins. The SRAM size is 8KB and EEPROM 512 bytes