74LS154

DM54LS154 DM74LS154 4-Line to 16-Line Decoders Demultiplexers May 1989 DM54LS154 DM74LS154 4-Line to 16-Line Decoders Demultiplexers General Description Each of these 4-line-to-16-line decoders utilizes TTL circuitry to decode four binary-coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs G1 and G2 are low The demultiplexing function is performed by using the 4 input lines to address the output line passing data from one of the strobe inputs with the other strobe input low When either strobe input is high all outputs are high These demultiplexers are ideally suited for implementing high-performance memory decoders All inputs are buffered and input clamping diodes are provided to minimize transmission-line effects and thereby simplify system design Features Y Y Y Y Y Y Decodes 4 binary-coded inputs into one of 16 mutually exclusive outputs Performs the demultiplexing function by distributing data from one input line to any one of 16 outputs Input clamping diodes simplify system design High fan-out low-impedance totem-pole outputs Typical propagation delay 3 levels of logic 23 ns Strobe 19 ns Typical power dissipation 45 mW Connection and Logic Diagrams Dual-In-Line Package TL F 6394–1 Order Number DM54LS154J DM74LS154WM or DM74LS154N See NS Package Number J24A M24B or N24A TL F 6394 – 2 C1995 National Semiconductor Corporation TL F 6394 RRD-B30M105 Printed in U S A 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 DM74LS 0 C to a 70 C b 65 C to a 150 C Storage Temperature Range Recommended 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 Free Air Operating Temperature b 55 DM54LS154 Nom 5 Max 55 07 b0 4 DM74LS154 Min 4 75 2 08 b0 4 Units Max 5 25 V V V mA mA C Nom 5 45 2 4 125 0 8 70 Electrical Characteristics Symbol VI VOH VOL Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage over recommended operating free air temperature range (unless otherwise noted) Conditions VCC e Min II e b18 mA VCC e Min IOH e Max VIL e Max VIH e Min VCC e Min IOL e Max VIL e Max VIH e Min IOL e 4 mA VCC e Min DM54 DM74 DM54 DM74 DM74 25 27 34 34 0 25 0 35 0 25 04 05 04 01 20 b0 4 Min Typ (Note 1) Max b1 5 Units V V V II IIH IIL IOS ICC Input Current Input Voltage Max VCC e Max VI e 7V VCC e Max VI e 2 7V VCC e Max VI e 0 4V VCC e Max (Note 2) VCC e Max (Note 3) DM54 DM74 b 20 b 20 mA mA mA mA mA High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current b 100 b 100 9 14 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 and all inputs grounded Switching Characteristics Symbol tPLH tPHL tPLH tPHL Parameter Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) To (Output) Data to Output Data to Output Strobe to Output Strobe to Output RL e 2 kX CL e 15 pF Min Max 30 30 20 25 CL e 50 pF Min Max 35 35 25 35 ns ns ns ns Units 2 Function Table Inputs G1 L L L L L L L L L L L L L L L L L H H G2 L L L L L L L L L L L L L L L L H L H D L L L L L L L L H H H H H H H H X X X C L L L L H H H H L L L L H H H H X X X B L L H H L L H H L L H H L L H H X X X A L H L H L H L H L H L H L H L H X X X 0 L H H H H H H H H H H H H H H H H H H 1 H L H H H H H H H H H H H H H H H H H 2 H H L H H H H H H H H H H H H H H H H 3 H H H L H H H H H H H H H H H H H H H 4 H H H H L H H H H H H H H H H H H H H 5 H H H H H L H H H H H H H H H H H H H 6 H H H H H H L H H H H H H H H H H H H 7 H H H H H H H L H H H H H H H H H H H Outputs 8 H H H H H H H H L H H H H H H H H H H 9 H H H H H H H H H L H H H H H H H H H 10 H H H H H H H H H H L H H H H H H H H 11 H H H H H H H H H H H L H H H H H H H 12 H H H H H H H H H H H H L H H H H H H 13 H H H H H H H H H H H H H L H H H H H 14 H H H H H H H H H H H H H H L H H H H 15 H H H H H H H H H H H H H H H L H H H H e High Level L e Low Level X e Don’t Care 3 4 Physical Dimensions inches (millimeters) 24-Lead Ceramic Dual-In-Line Package (J) Order Number DM54LS154J NS Package Number J24A 24-Lead Wide Small Outline Molded Package (M) Order Number DM74LS154WM NS Package Number M24B 5 DM54LS154 DM74LS154 4-Line to 16-Line Decoders Demultiplexers Physical Dimensions inches (millimeters) (Continued) 24-Lead Molded Dual-In-Line Package (N) Order Number DM74LS154N NS Package Number N24A 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 As used herein 1 Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user National Semiconductor Corporation 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