Description
BUY SN74HC138N. https://www.utsource.net/itm/p/12608723.html
| Parameter |
Conditions |
Min |
Typ |
Max |
Unit |
| Supply Voltage (VCC) |
|
2.0 |
|
6.0 |
V |
| Output Low Voltage (VOH) |
IO = -4mA, VCC = 5V |
|
0.1 |
|
V |
| Output High Voltage (VOL) |
IO = 16mA, VCC = 5V |
|
3.7 |
|
V |
| Input Leakage Current (II) |
VIN = 0V to VCC |
-1 |
|
1 |
μA |
| Propagation Delay Time |
tPLH, tPHL, VCC = 5V, TA = 25°C |
|
18 |
|
ns |
| Power Dissipation |
Per Package |
|
|
500 |
mW |
Instructions for SN74HC138N
Power Supply:
- Connect the supply voltage (VCC) between 2.0V and 6.0V.
- Ensure a stable power supply to prevent erratic behavior.
Input Handling:
- Be cautious with input voltages; they should not exceed VCC or go below GND to avoid damaging the device.
- Keep input leakage currents within specified limits to ensure reliable operation.
Output Configuration:
- The output low voltage (VOH) should be no higher than 0.1V when sourcing up to -4mA.
- The output high voltage (VOL) should be at least 3.7V when sinking up to 16mA.
Propagation Delay:
- Account for a typical propagation delay of 18ns under standard conditions (VCC = 5V, TA = 25°C).
Thermal Management:
- Ensure that the power dissipation does not exceed 500mW per package to maintain operational integrity.
Application Specific:
- This device is an 8-line to 3-line priority encoder. Ensure proper connection of enable inputs and outputs according to your application requirements.
Storage and Handling:
- Store in a dry environment and handle with care to prevent electrostatic discharge (ESD) damage.
Testing and Validation:
- Before deploying in a critical application, thoroughly test the device under expected operating conditions to validate performance and reliability.
(For reference only)
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