74LS241

DM54LS240 NSC | Alldatasheet

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Y TRI-STATE outputs drive bus lines directly Y PNP inputs reduce DC loading on bus lines Y Hysteresis at data inputs improves noise margins Y Typical I OL (sink current) 54LS 12 mA 74LS 24 mA Y Typical I OH (source current) 54LS b12 mA 74LS b15 mA Y Typical propagation delay times Inverting 10.5 ns Noninverting 12 ns Y Typical enable/disable time 18 ns Y Typical power dissipation (enabled) Inverting 130 mW Noninverting 135 mW Connection Diagrams Dual-In-Line Package TL/F/6411–1 Dual-In-Line Package TL/F/6411–2 Order Number DM54LS240J, DM54LS240W, DM54LS240E, DM74LS240WM or DM74LS240N See NS Package Number E20A, J20A, M20B, N20A or W20A Order Number DM54LS241J, DM54LS241W, DM54LS241E, DM74LS241WM or DM74LS241N See NS Package Number E20A, J20A, M20B, N20A or W20A Function Tables LS240 Inputs Output G AY LL H LH L HX Z LS241 Inputs Outputs GG 1A 2A 1Y 2Y XL L X L XL H X H XH X X Z HX X L L HX X H H LX X X Z L e Low Logic Level H e High Logic Level X e Either Low or High Logic Level Z e High Impedance TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. 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 7V Operating Free Air Temperature Range DM54LS, 54LS 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 DM54LS240, 241 DM74LS240, 241 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 b12 b15 mA IOL Low Level Output Current 12 24 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 18 mA b1.5 V HYS Hysteresis (V Ta b VTb)V CC e Min 0.2 0.4 VData Inputs Only VOH High Level Output Voltage V CC e Min, V IH e Min DM74 2.7VIL e Max, I OH eb 1m A VCC e Min, V IH e Min DM54/DM74 2.4 3.4 VVIL e Max, I OH eb 3m A VCC e Min, V IH e Min DM54/DM74 2VIL e 0.5V, I OH e Max VOL Low Level Output Voltage V CC e Min I OL e 12 mA DM74 0.4 VIL e Max IOL e Max DM54 0.4 VVIH e Min DM74 0.5 IOZH Off-State Output Current, V CC e Max V O e 2.7V 20 mAHigh Level Voltage Applied V IL e Max IOZL Off-State Output Current, VIH e Min VO e 0.4V b20 mALow Level Voltage Applied II Input Current at Maximum V CC e Max, V I e 7V (DM74) 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 b0.2 mA IOS Short Circuit Output Current V CC e Max (Note 2) b40 b225 mA ICC Supply Current V CC e Max, Outputs High LS240, LS241 13 23 Outputs Open Outputs Low LS240 26 44 LS241 27 46 mA Outputs Disabled LS240 29 50 LS241 32 54 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 at V CC e 5V and T A e 25§C Symbol Parameter Conditions DM54LS DM74LS Units Max Max tPLH Propagation Delay Time C L e 45 pF LS240 18 14 nsLow to High Level Output R L e 667X LS241 18 18 tPHL Propagation Delay Time C L e 45 pF LS240 18 18 nsHigh to Low Level Output R L e 667X LS241 18 18 tPZL Output Enable Time to C L e 45 pF LS240 30 30 nsLow Level R L e 667X LS241 30 30 tPZH Output Enable Time to C L e 45 pF LS240 23 23 nsHigh Level R L e 667X LS241 23 23 tPLZ Output Disable Time C L e 5 pF LS240 25 25 nsfrom Low Level R L e 667X LS241 25 25 tPHZ Output Disable Time C L e 5 pF LS240 18 18 nsfrom High Level R L e 667X LS241 18 18 tPLH Propagation Delay Time C L e 150 pF LS240 18 nsLow to High Level Output R L e 667X LS241 21 tPHL Propagation Delay Time C L e 150 pF LS240 22 nsHigh to Low Level Output R L e 667X LS241 22 tPZL Output Enable Time to C L e 150 pF LS240 33 nsLow Level R L e 667X LS241 33 tPZH Output Enable Time to C L e 150 pF LS240 26 nsHigh Level R L e 667X LS241 26 Note: 54LS Output load is C L e 50 pF for t PLH,t PHL,t PZL and t PZH.

Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) Order Number DM54LS240E or DM54LS241E 20-Lead Ceramic Dual-In-Line Package (J) Order Number DM54LS240J or DM54LS241J

Physical Dimensions inches (millimeters) (Continued) 20-Lead Wide Small Outline Molded Package (M) Order Number DM74LS240WM or DM74LS241WM 20-Lead Molded Dual-In-Line Package (N) Order Number DM74LS240N or DM74LS241N

DM54LS240/DM74LS240, DM54LS241/DM74LS241 Octal TRI-STATE Buffers/Line Drivers/Line Receivers Physical Dimensions inches (millimeters) (Continued) 20-Lead Ceramic Flat Package (W) Order Number DM54LS240W or DM54LS241W 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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