Have you been searching for a part from NXP only to find there are two? Are you confused because one of them has added the inexplicable Q900? Look no further! All this means is that the part is AEC-Q100 Qualified. It is exactly the same product which has undergone a little extra testing to earn the title.
Example Part
PCA9685PW,118
NXP USA Inc.
IC LED DRIVER RGBA 28-TSSOP
PCA9685PW/Q900,118
NXP USA Inc.
IC LED DRVR LIN DIM 25MA 28TSSOP
For more NXP Suffix related data check out this post as well