74LS20

54LS20 DM54LS20 DM74LS20 Dual 4-Input NAND Gates June 1989 54LS20 DM54LS20 DM74LS20 Dual 4-Input NAND Gates General Description This device contains two independent gates each of which performs the logic NAND function Features Y Alternate Military Aerospace device (54LS20) is available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram Dual-In-Line Package TL F 6355 – 1 Order Number 54LS20DMQB 54LS20FMQB 54LS20LMQB DM54LS20J DM54LS20W DM74LS20M or DM74LS20N See NS Package Number E20A J14A M14A N14A or W14B Function Table Y e ABCD Inputs A X X X L H B X X L X H C X L X X H D L X X X H Output Y H H H H L H e High Logic Level L e Low Logic Level X e Either Low or High Logic Level C1995 National Semiconductor Corporation TL F 6355 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 and 54LS DM74LS 0 C to a 70 C Storage Temperature Range b 65 C to a 150 C 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 DM54LS20 Nom 5 Max 55 Min 4 75 2 07 b0 4 DM74LS20 Nom 5 Max 5 25 Units V V 08 b0 4 45 2 V mA mA C 4 125 0 8 70 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH VOL Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Conditions VCC e Min II e b18 mA VCC e Min IOH e Max VIL e Max VCC e Min IOL e Max VIH e Min IOL e 4 mA VCC e Min II IIH IIL IOS ICCH ICCL Input Current Input Voltage Max VCC e Max VI e 7V VCC e Max VI e 2 7V VCC e Max VI e 0 4V VCC e Max (Note 2) VCC e Max VCC e Max DM54 DM74 b 20 b 20 Min Typ (Note 1) Max b1 5 Units V V DM54 DM74 DM54 DM74 DM74 25 27 34 34 0 25 0 35 0 25 04 05 04 01 20 b 0 36 b 100 b 100 V mA mA mA mA mA mA High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current with Outputs High Supply Current with Outputs Low 04 12 08 22 Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) RL e 2 kX Symbol Parameter Min tPLH tPHL Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output 3 3 CL e 15 pF Max 10 10 CL e 50 pF Min 4 4 Max 15 15 ns ns Units 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 3 Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) Order Number 54LS20LMQB NS Package Number E20A 14-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS20DMQB or DM54LS20J NS Package Number J14A 4 Physical Dimensions inches (millimeters) (Continued) 14-Lead Small Outline Molded Package (M) Order Number DM74LS20M NS Package Number M14A 14-Lead Molded Dual-In-Line Package (N) Order Number DM74LS20N NS Package Number N14A 5 54LS20 DM54LS20 DM74LS20 Dual 4-Input NAND Gates Physical Dimensions inches (millimeters) (Continued) 14-Lead Ceramic Flat Package (W) Order Number 54LS20FMQB or DM54LS20W NS Package Number W14B 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