3.3V pullups in a 5V signaling system
XL is 3.3 V-supply version of the chip, and it may be wise to pull its outputs up to this power rail rather than to 5 V one. Datasheet explicitly says that 3.3 V outputs can drive 5 V TTL inputs without problems.

However it may require special consideration in order not to create bridges of excessive current between outputs and inputs of devices connected to different power supplies. Check this one.