Description
BUY 74LS31 https://www.utsource.net/itm/p/98316.html
DELAY ELEMENTS
| Parameter |
Symbol |
Min |
Typ |
Max |
Unit |
| Supply Voltage |
VCC |
4.75 |
5.0 |
5.25 |
V |
| Input Low Voltage |
VIL |
0.0 |
- |
0.8 |
V |
| Input High Voltage |
VIH |
2.0 |
- |
5.25 |
V |
| Output Low Voltage |
VOL |
0.0 |
0.4 |
0.5 |
V |
| Output High Voltage |
VOH |
2.7 |
3.4 |
5.25 |
V |
| Input Current (Low) |
IIL |
-1.0 |
- |
-0.4 |
mA |
| Input Current (High) |
IIH |
-0.02 |
- |
0.4 |
mA |
| Output Current (Low) |
IOL |
-8.0 |
- |
-16.0 |
mA |
| Output Current (High) |
IOH |
0.4 |
- |
8.0 |
mA |
| Propagation Delay Time |
tpd |
- |
9.0 |
22.0 |
ns |
| Power Dissipation |
PD |
- |
- |
100.0 |
mW |
Instructions for Using 74LS31
Power Supply:
- Connect VCC to +5V and GND to 0V.
- Ensure the supply voltage is within the specified range (4.75V to 5.25V).
Input Connections:
- Apply input signals to the input pins (A1, A2, B1, B2, C1, C2, D1, D2).
- Ensure input voltages are within the valid range: VIL (0.0V to 0.8V) for low logic level and VIH (2.0V to 5.25V) for high logic level.
Output Connections:
- The outputs (Y1, Y2, Y3, Y4) will be active low when the corresponding inputs are not equal.
- Ensure the output current does not exceed the maximum ratings: IOL (up to -16.0mA) and IOH (up to 8.0mA).
Propagation Delay:
- The propagation delay time (tpd) is the time it takes for the output to change state after the input changes. It typically ranges from 9.0ns to 22.0ns.
Power Dissipation:
- The maximum power dissipation for the device is 100.0mW. Ensure proper heat dissipation if operating near this limit.
Handling:
- Handle the IC with care to avoid damage from static electricity.
- Store in an anti-static bag when not in use.
Testing:
- Before integrating the 74LS31 into your circuit, test it on a breadboard to ensure it functions correctly.
- Use a multimeter to verify input and output voltages and currents.
Schematic Integration:
- Refer to the datasheet for the pinout diagram and integrate the 74LS31 into your circuit schematic accordingly.
(For reference only)
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