74LS241

DM54LS240 DM74LS240 DM54LS241 DM74LS241 Octal TRI-STATE Buffers Line Drivers Line Receivers April 1992 DM54LS240 DM74LS240 DM54LS241 DM74LS241 Octal TRI-STATE Buffers Line Drivers Line Receivers General Description These buffers line drivers are designed to improve both the performance and PC board density of TRI-STATE buffers drivers employed as memory-address drivers clock drivers and bus-oriented transmitters receivers Featuring 400 mV of hysteresis at each low current PNP data line input they provide improved noise rejection and high fanout outputs and can be used to drive terminated lines down to 133X Y Y Y Features Y Y Y Y Y TRI-STATE outputs drive bus lines directly PNP inputs reduce DC loading on bus lines Hysteresis at data inputs improves noise margins Typical IOL (sink current) 54LS 12 mA 74LS 24 mA Typical IOH (source current) b 12 mA 54LS b 15 mA 74LS Typical propagation delay times Inverting 10 5 ns Noninverting 12 ns Typical enable disable time 18 ns Typical power dissipation (enabled) Inverting 130 mW Noninverting 135 mW Connection Diagrams Dual-In-Line Package Dual-In-Line Package TL F 6411 – 1 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 G L L H A L H X Output Y H L Z G X X X H H L G L L H X X X LS241 Inputs 1A L H X X X X 2A X X X L H X Outputs 1Y L H Z L H Z 2Y L e Low Logic Level H e High Logic Level X e Either Low or High Logic Level Z e High Impedance TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 6411 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 b 55 C to a 125 C DM54LS 54LS DM74LS 0 C to a 70 C b 65 C to a 150 C Storage Temperature Range 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 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 DM54LS240 241 Nom 5 Max 55 07 b 12 DM74LS240 241 Min 4 75 2 08 b 15 Units Max 5 25 V V V mA mA C Nom 5 45 2 12 125 0 24 70 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI HYS VOH Parameter Input Clamp Voltage Hysteresis (VT a b VTb) Data Inputs Only High Level Output Voltage Conditions VCC e Min II e b18 mA VCC e Min VCC e Min VIH e Min VIL e Max IOH e b1 mA VCC e Min VIH e Min VIL e Max IOH e b3 mA VCC e Min VIH e Min VIL e 0 5V IOH e Max VOL Low Level Output Voltage VCC e Min VIL e Max VIH e Min IOL e 12 mA IOL e Max VO e 2 7V VO e 0 4V DM74 DM54 DM74 DM54 DM74 DM74 DM54 DM74 02 27 24 2 04 04 05 20 b 20 Min Typ Max Units (Note 1) b1 5 V V 04 34 V V IOZH IOZL II IIH IIL IOS ICC Off-State Output Current VCC e Max High Level Voltage Applied VIL e Max VIH e Min Off-State Output Current Low Level Voltage Applied Input Current at Maximum Input Voltage High Level Input Current Low Level Input Current Supply Current VCC e Max VI e 7V (DM74) VI e 10V (DM54) VCC e Max VI e 2 7V VCC e Max VI e 0 4V mA mA mA mA mA mA 01 20 b0 2 b 40 b 225 Short Circuit Output Current VCC e Max (Note 2) VCC e Max Outputs Open Outputs High Outputs Low LS240 LS241 LS240 LS241 Outputs Disabled LS240 LS241 13 26 27 29 32 23 44 46 50 54 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 and the duration should not exceed one second 2 Switching Characteristics at VCC e 5V and TA e 25 C Symbol tPLH tPHL tPZL tPZH tPLZ tPHZ tPLH tPHL tPZL tPZH Parameter Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Output Enable Time to Low Level Output Enable Time to High Level Output Disable Time from Low Level Output Disable Time from High Level Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Output Enable Time to Low Level Output Enable Time to High Level Conditions CL e 45 pF RL e 667X CL e 45 pF RL e 667X CL e 45 pF RL e 667X CL e 45 pF RL e 667X CL e 5 pF RL e 667X CL e 5 pF RL e 667X CL e 150 pF RL e 667X CL e 150 pF RL e 667X CL e 150 pF RL e 667X CL e 150 pF RL e 667X LS240 LS241 LS240 LS241 LS240 LS241 LS240 LS241 LS240 LS241 LS240 LS241 LS240 LS241 LS240 LS241 LS240 LS241 LS240 LS241 DM54LS Max 18 18 18 18 30 30 23 23 25 25 18 18 DM74LS Max 14 18 18 18 30 30 23 23 25 25 18 18 18 21 22 22 33 33 26 26 ns ns ns ns ns ns ns ns ns ns Units Note 54LS Output load is CL e 50 pF for tPLH tPHL tPZL and tPZH 3 Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) Order Number DM54LS240E or DM54LS241E NS Package Number E20A 20-Lead Ceramic Dual-In-Line Package (J) Order Number DM54LS240J or DM54LS241J NS Package Number J20A 4 Physical Dimensions inches (millimeters) (Continued) 20-Lead Wide Small Outline Molded Package (M) Order Number DM74LS240WM or DM74LS241WM NS Package Number M20B 20-Lead Molded Dual-In-Line Package (N) Order Number DM74LS240N or DM74LS241N NS Package Number N20A 5 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 NS Package Number W20A 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 National Semiconductor Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications