Hello, usually the part numbers are listed at the end of the datasheet in the "Ordering Information" section. Most often, it is a difference in package or delivery condition (like Tube or Tape and Reel).
However, the code you mention does not appear in datasheet:
https://www.st.com/resource/en/datasheet/st1284.pdf
Could you please kindly share where you have found this code ?
Best regards,
Mohamed
