DM54LS273 NSC | Alldatasheet

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Y 8-bit high speed register Y Parallel in and out Y Common clock and master reset Connection Diagram Dual-In-Line Package TL/F/9825–1 Order Number DM54LS273E, DM54LS273J, DM54LS273W, DM74LS273M or DM74LS273N See NS Package Number E20A, J20A, M20B, N20A or W20A Pin Names Description CP Clock Pulse Input (Active Rising Edge) D0–D7 Data Inputs MR Asynchronous Master Reset Input (Active LOW) Q0–Q7 Flip-Flop Outputs C1995 National Semiconductor Corporation RRD-B30M115/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 7V Operating Free Air Temperature Range DM54LS b55§Ct o a125§C DM74LS 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 DM54LS273 DM74LS273 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 0.7 0.8 V IOH High Level Output Current b0.4 b0.4 mA IOL Low Level Output Current 4 8 mA TA Free Air Operating Temperature b55 125 0 70 §C ts(H) Setup Time HIGH or LOW 15 15 nsts(L) D n to CP 15 15 th(H) Hold Time HIGH or LOW 5 5 nsth(L) D n to CP 5 5 tw(H) CP Pulse Width HIGH or LOW 20 20 nstw(L) 20 20 tw(L) MR Pulse Width LOW 20 20 ns trec Recovery Time 15 15 nsMR to CP

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 18 mA b1.5 V VOH High Level Output V CC e Min, I OH e Max, DM54 2.5 VVoltage V IL e Max DM74 2.7 3.4 VOL Low Level Output V CC e Min, I OL e Max, DM54 0.4 Voltage V IH e Min DM74 0.35 0.5 V IOL e 4 mA, V CC e Min DM74 0.25 0.4 II Input Current @ Max V CC e Max, V I e 7V 0.1 mAInput Voltage V I e 10V (DM54) IIH High Level Input Current V CC e Max, V I e 2.7V 20 mA IIL Low Level Input Current V CC e Max, V I e 0.4V b0.4 mA IOS Short Circuit V CC e Max DM54 b20 b100 mAOutput Current (Note 2) DM74 b20 b100 ICC Supply Current V CC e Max 27 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, and the duration should not exceed one second.

Switching Characteristics VCC ea 5.0V, T A ea 25§C CL e 15 pF Symbol Parameter DM54LS DM74LS Units RL e 2k X Min Max Min Max fmax Maximum Clock Frequency 30 30 MHz tPLH Propagation Delay 24 24 nstPHL CP to Q n 24 24 tPLH Propagation Delay 27 27 nsMR to Q n Functional Description The ’LS273 is an 8-bit parallel register with a common Clock and common Master Reset. When the MR input is LOW, the Q outputs are LOW, independent of the other inputs. Infor- mation meeting the setup and hold time requirements of the D inputs is transferred to the Q outputs on the LOW-to- HIGH transition of the clock input. Truth Table Inputs Outputs MR CP D n Qn LX X L H L HH H L LL H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Logic Symbol TL/F/9825–2 VCC e Pin 20 GND e Pin 10 Logic Diagram TL/F/9825–3

Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) Order Number DM54LS273E 20-Lead Ceramic Dual-In-Line Package (J) Order Number DM54LS273J

Physical Dimensions inches (millimeters) (Continued) 20-Lead Wide Small Outline Molded Package (M) Order Number DM74LS273M 20-Lead Molded Dual-In-Line Package (N) Order Number DM74LS273N

DM54LS273/DM74LS273 8-Bit Register with Clear Physical Dimensions inches (millimeters) (Continued) 20-Lead Ceramic Flat Package (W) Order Number DM54LS273W 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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