Data memory (EEPROM): 256 bytes. Data memory (SRAM): 768 bytes. Pitch: 2.54mm. Program storage memory: 16 Kbytes. RoHS: yes. Pitch: 15.24mm. Assembly/installation: PCB through-hole mounting. Housing: PDIP. Housing (according to data sheet): PDIP-40. Operating frequency: 40MHz max. Note: FLASH Memory, FS-USB 2.0. Memory type: 'FLASH' memory. Number of terminals: 40. Inputs/outputs: 36