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54LS158 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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54LS158 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 8 page TLF6396 June 1989 54LS157DM54LS157DM74LS157 54LS158DM54LS158DM74LS158 Quad 2-Line to 1-Line Data SelectorsMultiplexers General Description These data selectorsmultiplexers contain inverters and drivers to supply full on-chip data selection to the four out- put gates A separate strobe input is provided A 4-bit word is selected from one of two sources and is routed to the four outputs The LS157 presents true data whereas the LS158 presents inverted data to minimize propagation delay time Applications Y Expand any data input point Y Multiplex dual data buses Y Generate four functions of two variables (one variable is common) Y Source programmable counters Features Y Buffered inputs and outputs Y Typical Propagation Time LS157 9 ns LS158 7 ns Y Typical Power Dissipation LS157 49 mW LS158 24 mW Y Alternate MilitaryAerospace device (54LS157 54LS158) is available Contact a National Semiconduc- tor Sales OfficeDistributor for specifications Connection Diagrams Dual-In-Line Package TLF6396 – 1 Order Number 54LS157DMQB 54LS157FMQB 54LS157LMQB DM54LS157J DM54LS157W DM74LS157M or DM74LS157N See NS Package Number E20A J16A M16A N16E or W16A Dual-In-Line Package TLF6396 – 2 Order Number 54LS158DMQB 54LS158FMQB 54LS158LMQB DM54LS158J DM54LS158W DM74LS158M or DM74LS158N See NS Package Number E20A J16A M16A N16E or W16A Function Table Inputs Output Y Strobe Select A B LS157 LS158 HX X X L H LL L X L H LL H X H L LH X L L H LH X H H L H e High Level L e Low Level X e Don’t Care C1995 National Semiconductor Corporation RRD-B30M105Printed in U S A |
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