SN74LS21N: 马来西亚的首选 Utsource Holding Company Limited

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BUY SN74LS21N https://www.utsource.net/itm/p/1157922.html
500mA, 8V,±2% Tolerance, Voltage Regulator, Ta = -40°C to +125°C; Package: DPAK 4 LEAD Single Gauge Surface Mount; No of Pins: 4; Container: Tape and Reel; Qty per Container: 2500

Parameter	Description	Min	Typ	Max	Unit
Supply Voltage (V_CC)	Operating supply voltage range	4.75	-	5.25	V
Input Voltage (V_IH)	High-level input voltage	2.0	-	5.25	V
Input Voltage (V_IL)	Low-level input voltage	0.0	-	0.8	V
Output Voltage (V_OH)	High-level output voltage (I_OL = 0.4 mA)	2.4	-	5.0	V
Output Voltage (V_OL)	Low-level output voltage (I_OH = 8.0 mA)	0.0	-	0.5	V
Input Current (I_IH)	High-level input current	-20	-	40	μA
Input Current (I_IL)	Low-level input current	-0.4	-	1.6	mA
Output Current (I_OH)	High-level output current	-0.4	-	-	mA
Output Current (I_OL)	Low-level output current	-	-	8.0	mA
Propagation Delay Time (t_pd)	Propagation delay time (input to output)	12	-	34	ns
Power Dissipation (P_D)	Maximum power dissipation	-	-	500	mW

Instructions for Using SN74LS21N

Power Supply:
- Connect the V_CC pin to a 5V power supply.
- Connect the GND pin to ground.
Input Connections:
- Connect the input pins (1, 2, 4, 5, 9, 10, 12, 13) to your logic signals.
- Ensure that the input voltages are within the specified range to avoid damage to the IC.
Output Connections:
- Connect the output pins (3, 6, 8, 11) to your load or next stage of the circuit.
- Ensure that the output current does not exceed the maximum ratings to prevent damage to the IC.
Decoupling Capacitors:
- Place a 0.1 μF ceramic capacitor between V_CC and GND as close to the IC as possible to reduce noise and improve stability.
Handling:
- Handle the IC with care to avoid static discharge, which can damage the device.
- Use proper anti-static precautions when handling and soldering the IC.
Testing:
- Before connecting the IC to your main circuit, test it on a breadboard to ensure it is functioning correctly.
- Use a multimeter to check the input and output voltages to verify the correct operation of the IC.
Storage:
- Store the IC in a dry, cool place away from direct sunlight and moisture to prevent damage.

By following these instructions, you can ensure the reliable operation of the SN74LS21N dual 4-input NAND gate IC in your circuits.

(For reference only)