Details

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BUY 74LS27 https://www.utsource.net/itm/p/12602976.html

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	VCC	4.75	5	5.25	V	Operating
Input High Voltage	VIH	2	-	5.25	V	Input Current: 20 渭A
Input Low Voltage	VIL	0	-	0.8	V	Input Current: -0.4 mA
Output High Voltage	VOH	2.4	-	5.25	V	Output Current: -0.4 mA
Output Low Voltage	VOL	0	-	0.5	V	Output Current: 16 mA
Propagation Delay Time	tpd	-	11	19	ns	VCC = 5V, TA = 25掳C
Power Dissipation	PD	-	-	100	mW	Per Package

Instructions for Use:

1. Power Supply:

   • Connect V_CC to +5V and GND to ground.
   • Ensure the supply voltage is within the specified range (4.75V to 5.25V).

2. Input Connections:

   • Connect the input pins (1, 2, 3) to your logic signals.
   • Ensure input voltages are within the specified range (0V to 5.25V).

3. Output Connections:

   • The output pin (4) will be active low when any of the inputs are high.
   • Ensure the output load does not exceed the maximum current ratings.

4. Propagation Delay:

   • The propagation delay time (t_pd) is the time it takes for the output to change state after an input change.
   • Typical delay is 11 ns at room temperature (25掳C).

5. Power Dissipation:

   • The total power dissipation should not exceed 100 mW per package to avoid overheating.

6. Operating Temperature:

   • The device is designed to operate in a temperature range from 0掳C to 70掳C.

7. Storage Temperature:

   • Store the device in a temperature range from -65掳C to 150掳C.

8. Handling Precautions:

   • Handle with care to avoid static damage.
   • Use proper ESD protection when handling the device.

9. Pin Configuration:

   • Pin 1: Input A
   • Pin 2: Input B
   • Pin 3: Input C
   • Pin 4: Output
   • Pin 5: Not Used
   • Pin 6: Not Used
   • Pin 7: GND
   • Pin 8: V_CC

10. Functional Description:

    • The 74LS27 is a triple 3-input NAND gate. Each gate performs a logical NAND operation on its three inputs.
    • The output is active low when any of the inputs are high, and active high when all inputs are low.

(For reference only)