74157 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 Features Applications Buffered inputs and outputs Typical propagation time 9 ns Typical power dissipation 150 m W Alternate Military Aerospace device (54157) is available Contact a National Semiconductor Sales Office Distributor for specifications Expand any data input point Multiplex dual data buses Generate four functions of two variables (one variable is mon) Source programmable counters Connection Diagram Dual-In-Line Package TL F 6550 - 1 Order Number 54157DMQB 54157FMQB DM54157J DM54157W or DM74157N See NS Package Number J16A 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 L L H L H Output Y H e High Level L e Low Level X e Don’t Care C1995 National Semiconductor Corporation TL F 6550 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 5 5V Operating Free Air Temperature Range b 55 C to a 125 C DM54 and 54 DM74 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 parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The ‘‘Remended Operating Conditions’’ table will define the conditions for actual device operation Remended Operating Conditions Symbol VCC VIH VIL IOH IOL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current...