74HCT139

BUY 74HCT139 https://www.utsource.net/itm/p/98083.html
Dual 2-to-4 line decoder/demultiplexer2-4/

Instructions for Using the 74HCT139:

1. Supply Voltage (V_CC):

   • The 74HCT139 operates within a supply voltage range of 2.0 V to 6.0 V. Ensure the power supply is stable and within this range to avoid damage to the device.

2. Input Voltages:

   • Input Low Voltage (V_IL): For an input to be recognized as low, it should be between 0.4 V and 0.8 V.
   • Input High Voltage (V_IH): For an input to be recognized as high, it should be between 2.0 V and 3.5 V.

3. Output Voltages:

   • Output Low Voltage (V_OL): When an output is low, it should not exceed 0.4 V under a load of 4.0 mA.
   • Output High Voltage (V_OH): When an output is high, it should be at least 2.4 V under a load of -0.4 mA.

4. Current Ratings:

   • Input Leakage Current (I_IL): The maximum leakage current through an input pin is ±1.0 μA.
   • Output Sink Current (I_OL): The maximum current that can be sunk by an output pin is 20 mA.
   • Output Source Current (I_OH): The maximum current that can be sourced by an output pin is -10 mA.

5. Propagation Delay Time (t_pd):

   • The typical propagation delay time is 15 ns, with a maximum of 35 ns at a supply voltage of 5.0 V.

6. Power Dissipation (P_tot):

   • The maximum power dissipation is 500 mW at an ambient temperature of 25°C. Ensure proper heat dissipation if operating near this limit.

7. Operating Temperature Range (T_A):

   • The device can operate over a temperature range from -40°C to 85°C.

8. Handling Precautions:

   • Handle the 74HCT139 with care to avoid static damage. Use appropriate ESD protection measures.
   • Ensure all connections are secure and free from shorts or open circuits.

9. Application Notes:

   • The 74HCT139 is a dual 1-of-4 decoder/demultiplexer. It can be used to decode binary inputs into one of four outputs, making it useful in digital logic circuits for address decoding, multiplexing, and other control applications.