5474

5474 DM5474 DM7474 Dual Positive-Edge-Triggered D Flip-Flops with Preset Clear and Complementary Outputs June 1989 5474 DM5474 DM7474 Dual Positive-Edge-Triggered D Flip-Flops with Preset Clear and Complementary Outputs General Description This device contains two independent positive-edge-triggered D flip-flops with complementary outputs The information on the D input is accepted by the flip-flops on the positive going edge of the clock pulse The triggering occurs at a voltage level and is not directly related to the transition time of the rising edge of the clock The data on the D input may be changed while the clock is low or high without affecting the outputs as long as the data setup and hold times are not violated A low logic level on the preset or clear inputs will set or reset the outputs regardless of the logic levels of the other inputs Features Y Alternate Military Aerospace device (5474) is available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram Dual-In-Line Package TL F 6526 – 1 Order Number 5474DMQB 5474FMQB DM5474J DM5474W DM7474M or DM7474N See NS Package Number J14A M14A N14A or W14B Function Table Inputs PR L H L H H H CLR H L L H H H CLK X X X D X X X H L X Outputs Q H L H H L Q0 Q L H H L H Q0 u u L H e High Logic Level X e Either Low or High Logic Level L e Low Logic Level e Positive-going transition of the clock e This configuration is nonstable that is it will not persist when either the preset and or clear inputs return to their inactive (high) level Q0 e The output logic level of Q before the indicated input conditions were established u C1995 National Semiconductor Corporation TL F 6526 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 5 5V Operating Free Air Temperature Range b 55 C to a 125 C DM54 and 54 DM74 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 fCLK tW Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Clock Frequency (Note 2) Pulse Width (Note 2) Clock High Clock Low Clear Low Preset Low tSU tH TA Input Setup Time (Notes 1 Input Hold Time (Notes 1 2) 2) 0 30 37 30 30 20u 5u b 55 DM5474 Nom 5 Max 55 08 b0 4 DM7474 Min 4 75 2 08 b0 4 Units Max 5 25 V V V mA mA MHz Nom 5 45 2 16 15 0 30 37 30 30 20u 5u 125 0 16 15 ns ns ns 70 C Free Air Operating Temperature Note 1 The symbol ( u) indicates the rising edge of the clock pulse is used for reference Note 2 TA e 25 C and VCC e 5V Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH VOL II IIH 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 VIH e Min VCC e Min IOL e Max VIH e Min VIL e Max VCC e Max VI e 5 5V VCC e Max VI e 2 4V D Clock Clear Preset IIL Low Level Input Current VCC e Max VI e 0 4V (Note 6) D Clock Clear Preset IOS ICC Short Circuit Output Current Supply Current VCC e Max (Note 4) DM54 DM74 b 20 b 18 Min Typ (Note 3) Max b1 5 Units V V 24 34 02 04 1 40 80 120 40 b1 6 b3 2 b3 2 b1 6 b 55 b 55 V mA High Level Input Current mA mA mA mA VCC e Max (Note 5) 17 30 Note 3 All typicals are at VCC e 5V TA e 25 C Note 4 Not more than one output should be shorted at a time Note 5 With all outputs open ICC is measured with the Q and Q outputs high in turn At the time of measurement the clock is grounded Note 6 Clear is tested with preset high and preset is tested with clear high 2 Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) Symbol Parameter From (Input) To (Output) Min fMAX tPHL tPLH tPHL tPLH tPHL tPLH Maximum Clock Frequency Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Preset to Q Preset to Q Clear to Q Clear to Q Clock to Q or Q Clock to Q or Q 15 40 25 40 25 40 25 RL e 400X CL e 15 pF Max MHz ns ns ns ns ns ns Units 3 Physical Dimensions inches (millimeters) 14-Lead Ceramic Dual-In-Line Package (J) Order Number 5474DMQB or DM5474J NS Package Number J14A 4 Physical Dimensions inches (millimeters) (Continued) 14-Lead Small Outline Molded Package (M) Order Number DM7474M NS Package Number M14A 14-Lead Molded Dual-In-Line Package (N) Order Number DM7474N NS Package Number N14A 5 5474 DM5474 DM7474 Dual Positive-Edge-Triggered D Flip-Flops with Preset Clear and Complementary Outputs Physical Dimensions inches (millimeters) (Continued) 14-Lead Ceramic Flat Package (W) Order Number 5474FMQB or DM5474W 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