LTC1421CQ LTC1421CSW LTC1421CSW#PBF LTC1421CSW#TR LTC1421CSW#TRPBF LTC1421CSW-2.5 LTC1421CSW-2.5#PBF LTC1421CSW-2.5#TR LTC1421CSW-2.5#TRPBF LTC1421CSW-2.5PBF