Instructions for Using GD74LS139:

1. Supply Voltage (V_CC):

   • Ensure the supply voltage is within the range of 4.75V to 5.25V to avoid damage to the device.

2. Input Voltages (V_IH, V_IL):

   • Input high voltage (V_IH) should be at least 2.0V.
   • Input low voltage (V_IL) should not exceed 0.8V.

3. Output Voltages (V_OH, V_OL):

   • Output high voltage (V_OH) will be at least 2.4V when the output current (I_OL) is 0.4 mA.
   • Output low voltage (V_OL) will be no more than 0.5V when the output current (I_OH) is -0.4 mA.

4. Leakage Currents (I_IL, I_OL):

   • Input leakage current (I_IL) should be within ±1.0 μA.
   • Output leakage current (I_OL) should be within ±100 μA.

5. Propagation Delay Time (t_pd):

   • The propagation delay time is the time it takes for a change in input to affect the output. It should be no more than 18 ns under standard conditions (V_CC = 5V, T_A = 25°C).

6. Power Dissipation (P_D):

   • The maximum power dissipation should not exceed 100 mW to prevent overheating and potential damage to the device.

7. Handling and Storage:

   • Handle the device with care to avoid static discharge.
   • Store in a dry environment to prevent moisture damage.

8. Circuit Design:

   • Ensure proper decoupling capacitors are used near the power supply pins to filter out noise.
   • Use appropriate pull-up or pull-down resistors for inputs that are not actively driven to avoid floating states.

By following these parameters and instructions, you can ensure reliable operation of the GD74LS139 IC in your circuit design.