Question: First of all, I don't know if this kind of question is allowed here, so sorry if it isn't.

I am looking for a 7400 series register which has common in and out pins (like for the RAM ou EEPROM: ![28C16](https://www.futurlec.com/Memory/28C16.gif)) with a load signal and a store signal. I searched on Google but I didn't found anything (maybe my searches are wrong).

Does it exist and if yes, what is its name/reference?

Answer: 
After deeper research on the Wikipedia list of the 7400 series (<https://en.wikipedia.org/wiki/List_of_7400_series_integrated_circuits>), I found out the 74299 which has common in/out pins.

I searched with the wrong keyword which should have been "bidirectionnal register".
There isn't a register that has common input and output pins, but you can certainly wire up a '373 or '374 (8-bit latch or register with tristate outputs) to achieve that functionality:

![schematic](https://i.stack.imgur.com/5UBPj.png)

[simulate this circuit](/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2f5UBPj.png) – Schematic created using [CircuitLab](https://www.circuitlab.com/)