54157/DM54157/DM74157 Quad 2-Line to 1-Line Data Selectors/Multiplexers General Description Features 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. Y Y Y Y Applications Y Y Y Y Buffered inputs and outputs Typical propagation time 9 ns Typical power dissipation 150 mW 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 common) 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 Output Y Strobe Select A B H L L L L X L L H H X L H X X X X X L H L L H L H 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. 54157/DM54157/DM74157 Quad 2-Line to 1-Line Data Selectors/Multiplexers June 1989 Absolute Maximum Ratings (Note) 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 ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation. 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 Recommended Operating Conditions Symbol DM54157 Parameter DM74157 Units Min Nom Max Min Nom Max 4.5 5 5.5 4.75 5 5.25 V 0.8 0.8 V VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage IOH High Level Output Current b 0.8 b 0.8 mA IOL Low Level Output Current 16 16 mA TA Free Air Operating Temperature 70 §C 2 2 b 55 125 V 0 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ (Note 1) Max Units b 1.5 V VI Input Clamp Voltage VOH High Level Output Voltage VCC e Min, II e b12 mA VCC e Min, IOH e Max VIL e Max, VIH e Min VOL Low Level Output Voltage VCC e Min, IOL e Max VIH e Min, VIL e Max II Input Current @ Max Input Voltage VCC e Max, VI e 5.5V IIH High Level Input Current VCC e Max, VI e 2.4V 40 mA IIL Low Level Input Current VCC e Max, VI e 0.4V b 1.6 mA IOS Short Circuit Output Current VCC e Max (Note 2) Supply Current VCC e Max (Note 3) ICC Note 1: All typicals are at VCC e 5V, TA e 25§ C. Note 2: Not more than one output should be shorted at a time. Note 3: ICC is measured with 4.5V applied to all inputs and all outputs open. 2 2.4 3.4 V 0.4 V 1 mA DM54 b 20 b 55 DM74 b 18 b 55 30 48 mA mA Switching Characteristics at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load) Symbol Parameter From (Input) To (Output) RL e 400X, CL e 15 pF Min Units Max tPLH Propagation Delay Time Low to High Level Output Data to Y 14 ns tPHL Propagation Delay Time High to Low Level Output Data to Y 14 ns tPLH Propagation Delay Time Low to High Level Output Strobe to Y 20 ns tPHL Propagation Delay Time High to Low Level Output Strobe to Y 21 ns tPLH Propagation Delay Time Low to High Level Output Select to Y 23 ns tPHL Propagation Delay Time High to Low Level Output Select to Y 27 ns Logic Diagram 157 TL/F/6550 – 2 3 4 Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54157W or DM54157J NS Package Number J16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM74157N NS Package Number N16E 5 54157/DM54157/DM74157 Quad 2-Line to 1-Line Data Selectors/Multiplexers Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 54157FMQB or DM54157W NS Package Number W16A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. 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