Tool/software:
The primary component in question has the TI part number “SN74LVC1G125DCK” and its derivative variants with varying lead finishes. Looking at the attached screen shot below, “SN74LVC1G125DCK” has several variants with unspecific lead finishes:
- SN74LVC1G125DCKR, NiPdAu | Sn | NiPdAu
- SN74LVC1G125DCKT, NiPdAu | Sn | NiPdAu
- SN74LVC1G125DCKTG4.B, “Call TI”
Based on the attached quality, reliability, & packaging (QRP) data downloads attached, the T variant appears to have a 100% NiPdAu lead finish and the R variant appears to have a 100% Sn lead finish. What I do not understand is why the material reports may indicate specific and unique lead finish compositions but the lead finish in the data sheet indicates that these parts may have multiple different lead finishes for the same part number. IE SN74LVC1G125DCKR is said to have NiPdAu | Sn | NiPdAu finish(es) but the QRP data indicates 100% NiPdAu (No Sn).
Could you please confirm for me whether if the various variants of SN74LVC1G125DCK are unique parts and that each of the identified variant’s part number of (3, 3.B, R, R.B, T, T.B, TG4.B) is a unique component with a single type of lead finish composition?
