Elec-component
SN74LS21N
SN74LS21N

 

SN74LS21N

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Danh mục: Elec-component Có sẵn (Số lượng:9999999)
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Mô tả

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 (VCC) Operating supply voltage range 4.75 - 5.25 V
Input Voltage (VIH) High-level input voltage 2.0 - 5.25 V
Input Voltage (VIL) Low-level input voltage 0.0 - 0.8 V
Output Voltage (VOH) High-level output voltage (IOL = 0.4 mA) 2.4 - 5.0 V
Output Voltage (VOL) Low-level output voltage (IOH = 8.0 mA) 0.0 - 0.5 V
Input Current (IIH) High-level input current -20 - 40 μA
Input Current (IIL) Low-level input current -0.4 - 1.6 mA
Output Current (IOH) High-level output current -0.4 - - mA
Output Current (IOL) Low-level output current - - 8.0 mA
Propagation Delay Time (tpd) Propagation delay time (input to output) 12 - 34 ns
Power Dissipation (PD) Maximum power dissipation - - 500 mW

Instructions for Using SN74LS21N

  1. Power Supply:

    • Connect the VCC pin to a 5V power supply.
    • Connect the GND pin to ground.

  2. 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.

  3. 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.

  4. Decoupling Capacitors:

    • Place a 0.1 μF ceramic capacitor between VCC and GND as close to the IC as possible to reduce noise and improve stability.

  5. 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.

  6. 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.

  7. 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)

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