Revised July 2001 DM7474 Dual Positive-Edge-Triggered D-Type Flip-Flops with Preset, Clear and Complementary Outputs General Description This device contains two independent positive-edge-triggered D-type 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. Ordering Code: Order Number Package Number Package Description DM7474M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow DM7474N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Inputs Outputs PR CLR CLK D Q L H X X H Q L H L X X L H L L X X H H ↑ H H L H H ↑ L L H H H L X Q0 Q0 H H (Note 1) (Note 1) H = HIGH Logic Level X = Either LOW or HIGH Logic Level L = LOW Logic Level ↑ = Positive-going transition of the clock. Q0 = The output logic level of Q before the indicated input conditions were established. Note 1: This configuration is nonstable; that is, it will not persist when either the preset and/or clear inputs return to their inactive (HIGH) level. © 2001 Fairchild Semiconductor Corporation DS006526 www.fairchildsemi.com DM7474 Dual Positive-Edge-Triggered D-Type Flip-Flops with Preset, Clear and Complementary Outputs September 1986 DM7474 Absolute Maximum Ratings(Note 2) Supply Voltage Note 2: 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 tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. 7V Input Voltage 5.5V 0°C to +70°C Operating Free Air Temperature Range −65°C to +150 °C Storage Temperature Range Recommended Operating Conditions Symbol Parameter Min Nom Max 4.75 5 5.25 Units VCC Supply Voltage VIH HIGH Level Input Voltage VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −0.4 mA V 2 IOL LOW Level Output Current fCLK Clock Frequency (Note 4) 0 tW Pulse Width Clock HIGH 30 (Note 4) Clock LOW 37 Clear LOW 30 Preset LOW V 16 mA 15 MHz ns 30 tSU Input Setup Time (Note 3)(Note 4) 20↑ tH Input Hold Time (Note 3)(Note 4) 5↑ TA Free Air Operating Temperature 0 ns ns °C 70 Note 3: The symbol (↑) indicates the rising edge of the clock pulse is used for reference. Note 4: TA = 25°C and V CC = 5V. Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ (Note 5) Max Units −1.5 V VI Input Clamp Voltage VCC = Min, II = −12 mA VOH HIGH Level VCC = Min, IOH = Max Output Voltage VIL = Max, VIH = Min LOW Level VCC = Min, IOL = Max Output Voltage VIH = Min, VIL = Max II Input Current @ Max Input Voltage VCC = Max, VI = 5.5V IIH HIGH Level VCC = Max D Input Current VI = 2.4V Clock 80 Clear 120 Preset 40 VOL IIL 2.4 3.4 0.2 V 0.4 V 1 mA 40 LOW Level VCC = Max D −1.6 Input Current VI = 0.4V Clock −3.2 (Note 8) Clear −3.2 Preset −1.6 IOS Short Circuit Output Current VCC = Max (Note 6) ICC Supply Current VCC = Max (Note 7) −18 17 Note 5: All typicals are at VCC = 5V, TA = 25°C. Note 6: Not more than one output should be shorted at a time. Note 7: 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 8: Clear is tested with preset HIGH and preset is tested with clear HIGH. www.fairchildsemi.com 2 µA mA −55 mA 30 mA at VCC = 5V and TA = 25°C Symbol Parameter From (Input) To (Output) fMAX Maximum Clock Propagation Delay Time Preset to Q HIGH-to-LOW Level Output tPLH Propagation Delay Time Preset to Q LOW-to-HIGH Level Output tPHL Propagation Delay Time Clear to Q HIGH-to-LOW Level Output tPLH Propagation Delay Time Clear to Q LOW-to-HIGH Level Output tPHL Propagation Delay Time Clock to Q or Q HIGH-to-LOW Level Output tPLH Propagation Delay Time Clock to Q or Q LOW-to-HIGH Level Output 3 Units Max 15 Frequency tPHL RL = 400Ω, CL = 15 pF Min MHz 40 ns 25 ns 40 ns 25 ns 40 ns 25 ns www.fairchildsemi.com DM7474 Switching Characteristics DM7474 Physical Dimensions inches (millimeters) unless otherwise noted 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow Package Number M14A www.fairchildsemi.com 4 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Package Number N14A Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in 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. 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 (c) 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. www.fairchildsemi.com 5 www.fairchildsemi.com DM7474 Dual Positive-Edge-Triggered D-Type Flip-Flops with Preset, Clear and Complementary Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued)