74HCT138D 3-to-8 line decoder, demultiplexer; inverting - Description: 3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled ; Logic switching levels: TTL ; Number of pins: 16 ; Output drive capability: +/- 4 mA ; Power dissipation considerations: Low Power ; Propagation delay: 17 ns; Voltage: 4.5-5.5 V