what is the difference between UCC2818DW, UCC2818D and UCC2818D.A? Other than MSL level.
Hello stephen.franks,
Welcome to the DigiKey TechForum! The UCC2818DW is distinct from the UCC2818D and UCC2818D.A as the “W” suffix denotes a different packaging size per the pack materials page 3 of the datasheet (page 35 of 46 in a PDF viewer):
In regards to the .A suffix that would indicate a difference between UCC2818D and UCC2818D.A, all of the data looks to be the same for both parts. Even the part marking is the same, which would insinuate that the parts are functionally and dimensionally exactly the same, but there is some internal TI process (such as a location of manufacturer or type of silicon) that makes the difference for their records. It appears almost all of their series have a .A alternative part number.
Regards,
Klint
For future reference, I found this link to a Texas Instruments notice regarding parts with a “.A” or “.B” suffix. Essentially, these parts may be produced in alternate locations, but require a special order, and special pricing will likely apply. See link above for more details.
From that link:
Products based on specialized manufacturing flows
| Suffix | Description |
|---|---|
| .A | Alternate part numbers with a “.A” suffix use a wafer fabricated in the U.S. and can be imported into the U.S. without potential future tariff impact. |
| .B | Alternate part numbers with a “.B” suffix can be imported into China without potential future tariff impact. |
| TI may offer additional suffixes in the future, to offer unique manufacturing location flows. |