The SN74AVCH4T245DR: Each channel sources or sinks 12 mA. That is typical for the 74AVCH family — enough to drive a few CMOS inputs or a short trace, but not a heavily loaded backplane or a long cable. If your bus has more than three or four loads, or runs longer than a few inches, you will want a buffer after this transceiver. The 3-state output lets you share the bus with other devices; the output goes high-impedance when the output-enable pin is deasserted.
16-SOIC, 0.154-inch body width, 3.90 mm. Standard SOIC-16 footprint — no surprises for the pick-and-place or the reflow profile. The Tape & Reel option (TR) is the production-friendly reel; Cut Tape (CT) is available for prototypes or small runs. Both are surface-mount; no through-hole variant exists for this part.