DM74LS158 Datasheet | National Semiconductor

Description These data selectors multiplexers contain inverters and drivers to supply full on-chip data selection to the four output 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 Features Applications Expand any data input point Multiplex dual data buses Generate four functions of two variables (one variable is mon) Source programmable counters Buffered inputs and outputs Typical Propagation Time LS157 9 ns LS158 7 ns Typical Power Dissipation LS157 49 m W LS158 24 m W Alternate Military Aerospace device (54LS157 54LS158) is available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagrams Dual-In-Line Package Dual-In-Line Package TL F 6396 - 1 TL F 6396 - 2 Order Number 54LS157DMQB 54LS157FMQB 54LS157LMQB DM54LS157J DM54LS157W DM74LS157M or DM74LS157N See NS Package Number E20A J16A M16A N16E or W16A Order Number 54LS158DMQB 54LS158FMQB 54LS158LMQB DM54LS158J DM54LS158W DM74LS158M or DM74LS158N See NS Package Number E20A J16A M16A N16E or W16A Function Table Inputs Strobe H L L L L Select X L L H H A X L H X X B X X X L H Output Y LS157 L L H L H LS158 H H L H L H e High Level L e Low Level X e Don’t Care C1995 National Semiconductor Corporation TL F 6396 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range b 55 C to a 125 C DM54LS and 54LS DM74LS 0 C to a 70 C Storage Temperature Range b 65 C to a 150 C Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed The device should not be operated at these limits The...