54157 NSC | Alldatasheet

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Y Buffered inputs and outputs Y Typical propagation time 9 ns Y Typical power dissipation 150 mW Y Alternate Military/Aerospace device (54157) is avail- able. Contact a National Semiconductor Sales Office/ Distributor for specifications. 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 HX X X L LL L X L LL H X H LH X L L LH X H H H e High Level, L e Low Level, X e Don’t Care C1995 National Semiconductor Corporation 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 DM54 and 54 b55§Ct o a125§C DM74 0 §Ct o a70§C Storage Temperature Range b65§Ct o a150§C Note: The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaran- teed. 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. Recommended Operating Conditions Symbol Parameter DM54157 DM74157 Units Min Nom Max Min Nom Max VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V VIH High Level Input Voltage 2 2 V VIL Low Level Input Voltage 0.8 0.8 V IOH High Level Output Current b0.8 b0.8 mA IOL Low Level Output Current 16 16 mA TA Free Air Operating Temperature b55 125 0 70 §C Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units(Note 1) VI Input Clamp Voltage V CC e Min, I I eb 12 mA b1.5 V VOH High Level Output V CC e Min, I OH e Max 2.4 3.4 VVoltage V IL e Max, V IH e Min VOL Low Level Output V CC e Min, I OL e Max 0.4 VVoltage V IH e Min, V IL e Max II Input Current @ Max V CC e Max, V I e 5.5V 1m AInput Voltage IIH High Level Input Current V CC e Max, V I e 2.4V 40 mA IIL Low Level Input Current V CC e Max, V I e 0.4V b1.6 mA IOS Short Circuit V CC e Max DM54 b20 b55 mAOutput Current (Note 2) DM74 b18 b55 ICC Supply Current V CC e Max (Note 3) 30 48 mA Note 1: All typicals are at V CC e 5V, T A 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.

Switching Characteristics at V CC e 5V and T A e 25§C (See Section 1 for Test Waveforms and Output Load) Symbol Parameter From (Input) R L e 400X,C L e 15 pF UnitsTo (Output) Min Max tPLH Propagation Delay Time Data 14 nsLow to High Level Output to Y tPHL Propagation Delay Time Data 14 nsHigh to Low Level Output to Y tPLH Propagation Delay Time Strobe 20 nsLow to High Level Output to Y tPHL Propagation Delay Time Strobe 21 nsHigh to Low Level Output to Y tPLH Propagation Delay Time Select 23 nsLow to High Level Output to Y tPHL Propagation Delay Time Select 27 nsHigh to Low Level Output to Y Logic Diagram 157 TL/F/6550–2

Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54157W or DM54157J 16-Lead Molded Dual-In-Line Package (N) Order Number DM74157N

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 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 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.

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