LTC1921IS8PBF(1) LTC1922CG-1#TRPBF LTC1922EG-1 LTC1922EG-1#PBF LTC1922EG-1#TR LTC1922EG-1#TRPBF LTC1922EN-1 LTC1922EN-1#PBF LTC1922IG-1 LTC1922IG-1#PBF