5474

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5474,DM5474 5474/DM5474 Dual Positive-Edge-Triggered D Flip-Flops with Preset, Clear and Complementary Outputs Literature Number: SNOS258B

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-trig- gered D flip-flops with complementary outputs. The informa- tion on the D input is accepted by the flip-flops on the posi- tive 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/Distrib- utor 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 Outputs PR CLR CLK D Q Q LH X X H L HL X X L H LL X X H * H* HH u HH L HH u LL H HH L X Q 0 Q0 H e High Logic Level X e Either Low or High Logic Level L e Low Logic Level u 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. Q 0 e The output logic level of Q before the indicated input conditions were established. C1995 National Semiconductor Corporation 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 DM54 and 54 b55§Ct o a125§C DM74 0 §Ct o a70§C Storage Temperature Range b65§Ct o a150§C Note: The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaran- teed. 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 Parameter DM5474 DM7474 Units Min Nom Max Min Nom Max VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V VIH High Level Input Voltage 2 2 V VIL Low Level Input Voltage 0.8 0.8 V IOH High Level Output Current b0.4 b0.4 mA IOL Low Level Output Current 16 16 mA fCLK Clock Frequency (Note 2) 0 15 0 15 MHz tW Pulse Width Clock High 30 30 (Note 2) Clock Low 37 37 ns Clear Low 30 30 Preset Low 30 30 tSU Input Setup Time (Note s1&2 ) 2 0 u 20u ns tH Input Hold Time (Note s1&2 ) 5 u 5u ns TA Free Air Operating Temperature b55 125 0 70 §C Note 1: The symbol ( u) indicates the rising edge of the clock pulse is used for reference. Note 2: TA e 25§C and V CC e 5V. Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units(Note 3) VI Input Clamp Voltage V CC e Min, I I eb 12 mA b1.5 V VOH High Level Output V CC e Min, I OH e Max 2.4 3.4 VVoltage V IL e Max, V IH e Min VOL Low Level Output V CC e Min, I OL e Max 0.2 0.4 VVoltage V IH e Min, V IL e Max II Input Current @ Max V CC e Max, V I e 5.5V 1m AInput Voltage IIH High Level Input V CC e Max D 40 Current V I e 2.4V Clock 80 mA Clear 120 Preset 40 IIL Low Level Input V CC e Max D b1.6 Current V I e 0.4V Clock b3.2 mA(Note 6) Clear b3.2 Preset b1.6 IOS Short Circuit V CC e Max DM54 b20 b55 mAOutput Current (Note 4) DM74 b18 b55 ICC Supply Current V CC e Max (Note 5) 17 30 mA Note 3: All typicals are at V CC e 5V, T A e 25§C. Note 4: Not more than one output should be shorted at a time. Note 5: With all outputs open, I CC 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.

Switching Characteristics at V CC e 5V and T A e 25§C (See Section 1 for Test Waveforms and Output Load) From (Input) RL e 400X Symbol Parameter To (Output) CL e 15 pF Units Min Max fMAX Maximum Clock 15 MHzFrequency tPHL Propagation Delay Time Preset 40 nsHigh to Low Level Output to Q tPLH Propagation Delay Time Preset 25 nsLow to High Level Output to Q tPHL Propagation Delay Time Clear 40 nsHigh to Low Level Output to Q tPLH Propagation Delay Time Clear 25 nsLow to High Level Output to Q tPHL Propagation Delay Time Clock to 40 nsHigh to Low Level Output Q or Q tPLH Propagation Delay Time Clock to 25 nsLow to High Level Output Q or Q

Physical Dimensions inches (millimeters) 14-Lead Ceramic Dual-In-Line Package (J) Order Number 5474DMQB or DM5474J

Physical Dimensions inches (millimeters) (Continued) 14-Lead Small Outline Molded Package (M) Order Number DM7474M 14-Lead Molded Dual-In-Line Package (N) Order Number DM7474N

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 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 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.

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a49) 0-180-530 85 86 13th Floor, Straight Block, Tel: 81-043-299-2309 Arlington, TX 76017 Email: cnjwge @ tevm2.nsc.com Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408 Tel: 1(800) 272-9959 Deutsch Tel: ( a49) 0-180-530 85 85 Tsimshatsui, Kowloon Fax: 1(800) 737-7018 English Tel: ( a49) 0-180-532 78 32 Hong Kong Fran3ais Tel: ( a49) 0-180-532 93 58 Tel: (852) 2737-1600 Italiano Tel: ( a49) 0-180-534 16 80 Fax: (852) 2736-9960 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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