Description
The 74LS138 3-to-8 Line Decoder / Demultiplexer is fabricated on a 2µm 40V Bipolar process. The device decodes 1-of-8 lines, set by x3 binary select inputs & three enable inputs. Multiple Input Enables allow parallel expansion to a 24-line decoder using x3 74LS138 devices or a 32 line decoder using x4 74LS138 + inverter. The LS138 can be used as an 8- output demultiplexer by using one active LOW Enable input as data input & the other Enable inputs as strobes. Unused Enable inputs must be permanently tied to their appropriate active HIGH or active LOW state.

FEATUREs:
◾ Demultiplexing capability
◾ Multiple Input Enables for parallel expansion
◾ Active Low Mutually Exclusive Outputs
◾ Input Clamp Diodes Limit High Speed Termination
   Effects
◾ Direct drop-in replacement for obsolete
   components in long term programs.

Supply Formats:
◾ Default – Die in Waffle Pack (100 per tray capacity)
◾ Sawn Wafer on Tape – On request
◾ Unsawn Wafer – On request
◾ Die Thickness <> 350µm(14 Mils) – On request
◾ Assembled into Plastic Package – On request