To ensure you have the most recent version (including the latest errata), follow these steps:
Matches the physical code on top of the chip to the "Ordering Information" section of the PDF. highway09a pdf datasheet
The Highway09A is favored in modern electronics for several distinct advantages listed in its documentation: To ensure you have the most recent version
Search by the full part number (e.g., HW09A-G ). highway09a pdf datasheet