This document describes multiple models of octal bus transceivers and registers, including SN54ALS652, SN54ALS653, SN54AS651, SN54AS652, SN74ALS651A, SN74ALS652A, SN74ALS653, SN74ALS654, SN74AS651, and SN74AS652. These devices have independent registers and enables for A and B buses, allowing multiplexed transmission of real-time and stored data. Users can choose between true or inverting data paths, as well as 3-state or open-collector outputs to the A bus. The document also mentions different package options.