54279/DM74279 Quad Set-Reset Latch General Description This device contains four independent set-reset type flipflops with one Q output each. Connection Diagram Dual-In-Line Package TL/F/9785 – 1 Order Number 54279DMQB, 54279FMQB or DM74279N NS Package Number J16A, N16E or W16A Pin Names Rn Sn Q Description Reset Inputs (Active Low) Set Inputs (Active Low) Outputs Truth Table S1 Inputs S2 R Output Q L L X H H L X L H H L H H L H h H H L No Change H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial h e The output is HIGH as long as S1 or S2 is LOW. If all inputs go HIGH simultaneously, the output state is indeterminate; otherwise, it follows the Truth Table. C1995 National Semiconductor Corporation TL/F/9785 RRD-B30M115/Printed in U. S. A. 54279/DM74279 Quad Set-Reset Latch June 1989 Absolute Maximum Ratings (Note) 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. 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 b 55§ C to a 125§ C 54 DM74 0§ C to a 70§ C b 65§ C to a 150§ C Storage Temperature Range Recommended Operating Conditions Symbol 54279 Parameter VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage IOH High Level Output Current IOL Low Level Output Current TA Free Air Operating Temperature DM74279 Units Min Nom Max Min Nom Max 4.5 5 5.5 4.75 5 5.25 2 V 2 V 0.8 0.8 V b 0.8 b 0.8 mA 16 mA 70 §C 16 b 55 125 0 Electrical Characteristics over Recommended Operating Free Air Temperature Range (Unless Otherwise Noted) Symbol VI Parameter Conditions Input Clamp Voltage VCC e Min, II e b12 mA VOH High Level Output Voltage VCC e Min, IOH e Max, VIL e Max VOL Low Level Output Voltage VCC e Min, IOL e Max, VIH e Min II Input Current @ Max Input Voltage VCC e Max, VI e 5.5V IIH High Level Input Current IIL IOS ICC Min 2.4 Typ (Note 1) Max Units b 1.5 V 3.4 0.2 V 0.4 V 1 mA VCC e Max, VI e 2.4V 40 mA Low Level Input Current VCC e Max, VI e 0.4V b 1.6 mA Short Circuit Output Current VCC e Max (Note 2) Supply Current VCC e Max, R e 0V 54 b 20 b 55 DM74 b 18 b 57 30 mA Switching Characteristics Symbol 54/DM74 Parameter Min Units Max tPLH tPHL Propagation Delay S to Q 22 15 ns tPHL Propagation Delay R to Q 27 ns 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. 2 mA Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54279DMQB NS Package Number J16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM74279N NS Package Number N16E 3 54279/DM74279 Quad Set-Reset Latch Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 54279FMQB NS Package Number W16A 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 Fran3ais 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.