I see that this part comes in a "DW" package. There are 3 different versions though, DW, DWR and DWG4. The difference between DW and DWR appears to be tube vs tape and real, but what is the DWG4? I can't find any difference between it and just DW. Further there is no DWG4 on TI.com but it is referenced in the data sheet and is on Mouser.com, who has the DWG4 coming in a month. I am ordering a CCA, and need a few ISO3086s. Is there something I am missing or can I use the DWG4 part?