LM2940-90-TN3-T LM2940-90-TQ3-T LM2940C LM2940C-12 MWC LM2940CDT-3.3 LM2940CDT-5.0 LM2940CDTX-3.3 LM2940CDTX-5.0 LM2940CMP-5.0/TR LM2940CS