Description
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°C to +85°C |
| Input Current (IIH/IIL) |
±1μA |
| Output Current (IOH/IOL) |
±8mA |
Instructions for Use
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.
Power Supply:
- Connect Vcc to pin 20 and GND to pin 10.
- Ensure the supply voltage is within the specified range to avoid damage.
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.
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.
Handling Precautions:
- Handle with care to prevent electrostatic discharge (ESD) damage.
- Ensure proper heat sinking if operating near maximum power dissipation.
Applications:
- Suitable for use in multiplexing, demultiplexing, and address decoding in digital circuits.
(For reference only)
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