Details

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BUY HC139 https://www.utsource.net/itm/p/12610501.html

Parameter	Description
Part Number	HC139
Function	1-of-16 Decoder/Demultiplexer
Package Type	DIP, SOP
Number of Pins	20
Operating Voltage (Vcc)	4.5V to 18V
Propagation Delay Time	Typically 22ns at Vcc = 15V
Power Dissipation	100mW (Max)
Operating Temperature	-40掳C to +85掳C
Input Current (IIH/IIL)	卤1渭A
Output Current (IOH/IOL)	卤8mA

Instructions for Use

1. Pin Configuration:

   • The HC139 has 4 binary input lines (A, B, C, D), which can select one out of 16 outputs.
   • Enable inputs (E1 and E2) must be low for the device to operate; otherwise, all outputs are high.

2. Power Supply:

   • Connect Vcc to pin 20 and GND to pin 10.
   • Ensure the supply voltage is within the specified range to avoid damage.

3. Signal Inputs:

   • Apply binary signals to pins 1 (D), 2 (C), 3 (B), and 4 (A).
   • Set enable inputs (pins 5 and 6) low to activate decoding.

4. Outputs:

   • Outputs are active low; only one output will be low depending on the input combination.
   • Unused or unconnected outputs should be left floating or tied high if necessary.

5. Handling Precautions:

   • Handle with care to prevent electrostatic discharge (ESD) damage.
   • Ensure proper heat sinking if operating near maximum power dissipation.

6. Applications:

   • Suitable for use in multiplexing, demultiplexing, and address decoding in digital circuits.

(For reference only)