Instructions for Using 74HC74D

1. Power Supply:

   • Connect the V_CC pin to a supply voltage between 2.0V and 6.0V.
   • Connect the GND pin to ground.

2. Inputs:

   • Ensure that input signals (D, CLK, PR, CLR) are within the specified voltage levels:
     • Low level (V_IL): typically 0.8V or lower.
     • High level (V_IH): typically 2.0V or higher.

3. Outputs:

   • The output pins (Q and Q?) will provide logic levels based on the state of the flip-flop:
     • Low level (V_OL): typically 0.1V to 0.4V.
     • High level (V_OH): typically 2.4V or higher.

4. Propagation Delay:

   • The time delay between the application of a clock pulse and the change in the output state is typically 13ns to 25ns.

5. Temperature Range:

   • The device is designed to operate within a temperature range of -40°C to 85°C.

6. Power Dissipation:

   • Ensure that the power dissipation does not exceed 100mW to avoid overheating and potential damage.

7. Reset and Set Inputs:

   • Active low reset (PR) and set (CLR) inputs can be used to asynchronously reset or set the flip-flop. Ensure these inputs are held high (V_CC) when not in use to prevent unintended operation.

8. Clock Input:

   • The clock input (CLK) should be a clean, square wave to ensure reliable operation of the flip-flop.

9. Data Input:

   • The data input (D) determines the state of the flip-flop on the rising edge of the clock signal.

10. Storage and Handling:

    • Handle the device with care to avoid static discharge and physical damage. Store in a dry, cool place when not in use.

By following these instructions, you can ensure reliable and efficient operation of the 74HC74D dual D-type flip-flop.