54154/DM54154/DM74154 4-Line to 16-Line Decoders/Demultiplexers General Description Features Each or 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. Y 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 19 ns Strobe 18 ns Typical power dissipation 170 mW Alternate Military/Aerospace device (54154) is available. Contact a National Semiconductor Sales Office/ Distributor for specifications. Connection Diagram Dual-In-Line Package TL/F/6548 - 1 Order Number 54154DMQB, 54154FMQB, DM54154J or DM74154N See NS Package Number J24A, N24A or W24C C1995 National Semiconductor Corporation TL/F/6548 RRD-B30M105/Printed in U. S. A. 54154/DM54154/DM74154 4-Line to 16-Line Decoders/Demultiplexers 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 DM54154 Parameter DM74154 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 Electrical Characteristics Symbol 2 2 b 55 125 V 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 b12 mA VOH High Level Output Voltage 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 Input Voltage VCC e Max, VI e 5.5V IIH High Level Input Current IIL Low Level Input Current VCC e Max, VI e 2.4V VCC e Max, VI e 0.4V IOS Short Circuit Output Current VCC e Max (Note 2) DM54 b 20 b 55 DM74 b 18 b 57 Supply Current VCC e Max (Note 3) DM54 34 49 DM74 34 56 ICC @ Max 2.4 3.2 V 0.25 0.4 V 1 mA 40 mA b 1.6 mA mA mA 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 all outputs open and all inputs grounded. Switching Characteristics Symbol at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) 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 Output 36 ns tPHL Propagation Delay Time High to Low Level Output Data to Output 33 ns tPLH Propagation Delay Time Low to High Level Output Strobe to Output 30 ns tPHL Propagation Delay Time High to Low Level Output Strobe to Output 27 ns 2 Function Table Inputs Outputs G1 G2 D C B A 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 L L L L L L L L L L L L L L L L L H H L L L L L L L L L L L L L L L L H L H L L L L L L L L H H H H H H H H X X X L L L L H H H H L L L L H H H H X X X L L H H L L H H L L H H L L H H X X X L H L H L H L H L H L H L H L H X X X L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H L H H H H 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 Logic Diagram TL/F/6548 - 2 3 4 Physical Dimensions inches (millimeters) 24-Lead Ceramic Dual-In-Line Package (J) Order Number 54154DMQB or DM54154J NS Package Number J24A 24-Lead Molded Dual-In-Line Package (N) Order Number DM74154N NS Package Number N24A 5 54154/DM54154/DM74154 4-Line to 16-Line Decoders/Demultiplexers Physical Dimensions inches (millimeters) (Continued) 24-Lead Ceramic Flat Package (W) Order Number 54154FMQB NS Package Number W24C 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 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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