IC 74138 (3-to-8 line decoder/demultiplexer),CD74HC138 data sheet, product information and support | TI.com,microtivity: Pack of 2 74HC138 3-to-8 Line Decoder,7400 Series Guide: 74HC138/74LS138 (3-to-8 line decoder),74VHC138M - FSC - 48 pcs LOT - Decoder/Demultiplexer Single