Details

---

BUY SN74LS540N https://www.utsource.net/itm/p/11226656.html
IC BUFFER INVERT 5.25V 20DIP

Parameter	Symbol	Min	Typ	Max	Unit
Supply Voltage	VCC	4.75	5.0	5.25	V
Input Voltage (High Level)	VIH	2.0	-	5.5	V
Input Voltage (Low Level)	VIL	0	-	0.8	V
Output Voltage (High Level)	VOH	2.4	-	5.0	V
Output Voltage (Low Level)	VOL	0	-	0.5	V
Input Current (High Level)	IIH	-1	-	20	μA
Input Current (Low Level)	IIL	-20	-	1	μA
Output Current (High Level)	IOH	-0.4	-	-	mA
Output Current (Low Level)	IOL	-	-	8.0	mA
Propagation Delay Time	tpd	9	-	36	ns
Power Dissipation	PD	-	-	500	mW

Instructions for Using SN74LS540N

1. Power Supply:

   • Ensure the supply voltage (V_CC) is within the range of 4.75V to 5.25V.
   • Connect the ground (GND) pin to a stable ground reference.

2. Input Signals:

   • High-level input signals should be between 2.0V and 5.5V.
   • Low-level input signals should be between 0V and 0.8V.
   • Input currents should not exceed 20μA for high levels and -20μA for low levels.

3. Output Signals:

   • High-level output signals will be between 2.4V and 5.0V.
   • Low-level output signals will be between 0V and 0.5V.
   • The output can sink up to 8.0mA and source up to 0.4mA.

4. Propagation Delay:

   • The propagation delay time (t_pd) is typically between 9ns and 36ns. This is the time it takes for the output to change state after the input changes.

5. Power Dissipation:

   • The maximum power dissipation (P_D) is 500mW. Ensure proper heat dissipation if operating near this limit.

6. Handling:

   • Handle the IC with care to avoid static damage.
   • Use appropriate ESD protection when handling and soldering the IC.

7. Mounting:

   • Ensure the PCB layout provides adequate space and cooling for the IC.
   • Follow standard PCB design practices to minimize noise and interference.

8. Testing:

   • Test the IC under specified conditions to ensure it meets the required performance parameters.
   • Use a multimeter or oscilloscope to verify input and output voltages and current levels.

By following these instructions, you can ensure reliable operation of the SN74LS540N in your circuit.

(For reference only)