54LS151/DM54LS151/DM74LS151 Data Selector/Multiplexer General Description Features This data selector/multiplexer contains full on-chip decoding to select the desired data source. The ’LS151 selects one-of-eight data sources. The ’LS151 has a strobe input which must be at a low logic level to enable these devices. A high level at the strobe forces the W output high, and the Y output low. The ’LS151 features complementary W and Y outputs. Y Y Y Y Y Y Y Select one-of-eight data lines Performs parallel-to-serial conversion Permits multiplexing from N lines to one line Also for use as Boolean function generator Typical average propagation delay time data input to W output 12.5 ns Typical power dissipation 30 mW Alternate Military/Aerospace device (54LS151) is available. Contact a National Semiconductor Sales Office/ Distributor for specifications. Connection Diagram Dual-In-Line Package TL/F/6392 – 1 Order Number 54LS151DMQB, 54LS151FMQB, 54LS151LMQB, DM54LS151J, DM54LS151W, DM74LS151M or DM74LS151N See NS Package Number E20A, J16A, M16A, N16E or W16A Truth Table Inputs Select C B A X L L L L H H H H X L L H H L L H H X L H L H L H L H Outputs Strobe S Y W H L L L L L L L L L D0 D1 D2 D3 D4 D5 D6 D7 H D0 D1 D2 D3 D4 D5 D6 D7 H e High Level, L e Low Level, X e Don’t Care D0, D1...D7 e the level of the respective D input C1995 National Semiconductor Corporation TL/F/6392 RRD-B30M105/Printed in U. S. A. 54LS151/DM54LS151/DM74LS151 Data Selector/Multiplexer 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 7V Operating Free Air Temperature Range b 55§ C to a 125§ C DM54LS and 54LS DM74LS 0§ C to a 70§ C b 65§ C to a 150§ C Storage Temperature Range Recommended Operating Conditions Symbol DM54LS151 Parameter VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage IOH High Level Output Current IOL Low Level Output Current TA Free Air Operating Temperature Electrical Characteristics Symbol DM74LS151 Units Min Nom Max Min Nom Max 4.5 5 5.5 4.75 5 5.25 V 0.7 0.8 V b 0.4 b 0.4 mA 8 mA 70 §C 2 2 V 4 b 55 125 0 over recommended operating free air temperature range (unless otherwise noted) Parameter Conditions Min Typ (Note 1) Max Units b 1.5 V VI Input Clamp Voltage VCC e Min, II e b18 mA VOH High Level Output Voltage VCC e Min, IOH e Max VIL e Max, VIH e Min Low Level Output Voltage VCC e Min, IOL e Max VIL e Max, VIH e Min DM54 0.25 0.4 DM74 0.35 0.5 IOL e 4 mA, VCC e Min DM74 0.25 0.4 VOL DM54 2.5 3.4 DM74 2.7 3.4 V V II Input Current @ Max Input Voltage VCC e Max, VI e 7V IIH High Level Input Current VCC e Max, VI e 2.7V 20 mA IIL Low Level Input Current VCC e Max, VI e 0.4V b 0.4 mA IOS Short Circuit Output Current VCC e Max (Note 2) Supply Current VCC e Max (Note 3) ICC 0.1 DM54 b 20 b 100 DM74 b 20 b 100 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, and the duration should not exceed one second. Note 3: ICC is measured with all outputs open, strobe and data select inputs at 4.5V, and all other inputs open. 2 6 10 mA mA mA Switching Characteristics at VCC e 5V and TA e 25§ C (See Section 1 for Test Waveforms and Output Load) Symbol Parameter RL e 2 kX From (Input) To (output) CL e 15 pF Min Max CL e 50 pF Min Units Max tPLH Propagation Delay Time Low to High Level Output Select (4 Levels) to Y 43 46 ns tPHL Propagation Delay Time High to Low Level Output Select (4 Levels) to Y 30 36 ns tPLH Propagation Delay Time Low to High Level Output Select (3 Levels) to W 23 25 ns tPHL Propagation Delay Time High to Low Level Output Select (3 Levels) to W 32 40 ns tPLH Propagation Delay Time Low to High Level Output Strobe to Y 42 44 ns tPHL Propagation Delay Time High to Low Level Output Strobe to Y 32 40 ns tPLH Propagation Delay Time Low to High Level Output Strobe to W 24 27 ns tPHL Propagation Delay Time High to Low Level Output Strobe to W 30 36 ns tPLH Propagation Delay Time Low to High Level Output D0 thru D7 to Y 32 35 ns tPHL Propagation Delay Time High to Low Level Output D0 thru D7 to Y 26 33 ns tPLH Propagation Delay Time Low to High Level Output D0 thru D7 to W 21 25 ns tPHL Propagation Delay Time High to Low Level Output D0 thru D7 to W 20 27 ns Logic Diagram LS151 Address Buffers for 54LS151/74LS151 TL/F/6392 – 3 TL/F/6392 – 2 See Address Buffers to the Right 3 Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) Order Number 54LS151LMQB NS Package Number E20A Ceramic Dual-In-Line Package (J) Order Number 54LS151DMQB or DM54LS151J NS Package Number J16A 4 Physical Dimensions inches (millimeters) (Continued) 16-Lead Small Outline Molded Package (M) Order Number DM74LS151M NS Package Number M16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS151N NS Package Number N16E 5 54LS151/DM54LS151/DM74LS151 Data Selector/Multiplexer Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 54LS151FMQB or DM54LS151W 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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