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DM74279 Dataheets PDF



Part Number DM74279
Manufacturers National Semiconductor
Logo National Semiconductor
Description Quad Set-Reset Latch
Datasheet DM74279 DatasheetDM74279 Datasheet (PDF)

54279 DM74279 Quad Set-Reset Latch June 1989 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 L L X H H Inputs S2 L X L H H R L H H L H Output Q h H H L No Change.

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54279 DM74279 Quad Set-Reset Latch June 1989 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 L L X H H Inputs S2 L X L H H R L H H L H Output Q 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 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 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 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 54279 Nom 5 Max 55 Min 4 75 2 08 b0 8 DM74279 Nom 5 Max 5 25 Units V V 08 b0 8 45 2 V mA mA C 16 125 0 16 70 Electrical Characteristics over Recommended Operating Free Air Temperature Range (Unless Otherwise Noted) Symbol VI VOH VOL II IIH IIL IOS Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Input Current Input Voltage Max Conditions VCC e Min II e b12 mA VCC e Min IOH e Max VIL e Max VCC e Min IOL e Max VIH e Min VCC e Max VI e 5 5V VCC e Max VI e 2 4V VCC e Max VI e 0 4V VCC e Max (Note 2) VCC e Max R e 0V 54 DM74 b 20 b 18 Min Typ (Note 1) Max b1 5 Units V V 24 34 02 04 1 40 b1 6 b 55 b 57 V mA mA mA mA mA High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current ICC 30 Switching Characteristics Symbol tPLH tPHL tPHL Parameter Min Propagation Delay S to Q Propagation Delay R to Q 54 DM74 Max 22 15 27 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 2 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 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 .


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