It is the same as 74AC573. When G is enable the data output follows the data input. That will not suit the application. The data need to be store somewhere in the IC, and only output when we control. So, we have IC 1 store the data, its recent output is all Low; the same for all other ICs. Only when we send "enable" then all of them output their private data at the same time.
The octal latch seems not to have this capability.
The octal latch seems not to have this capability.