74 series Digital Integrated Circuits
SN74LS247N
SN74LS247N

 

SN74LS247N

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Penerangan

BUY SN74LS247N https://www.utsource.net/itm/p/1709410.html
BCD-TO-SEVEN-SEGMENT DECODERS/DRIVERS

Parameter Symbol Min Typical Max Unit Conditions
Supply Voltage VCC 4.75 5.0 5.25 V -
Input High Voltage VIH 2.0 - 5.5 V -
Input Low Voltage VIL 0.0 - 0.8 V -
Output High Voltage VOH 2.4 - 5.0 V IO = -0.4 mA
Output Low Voltage VOL 0.0 - 0.5 V IO = 16 mA
Propagation Delay Time tpd - 35 60 ns VCC = 5V, TA = 25°C
Power Dissipation PD - - 500 mW -
Operating Temperature TA -55 - 125 °C -
Storage Temperature TSTG -65 - 150 °C -

Instructions for SN74LS247N

  1. Power Supply:

    • Ensure the supply voltage (VCC) is within the range of 4.75V to 5.25V.
    • Connect the ground (GND) pin to a stable 0V reference.

  2. Input Signals:

    • Apply input signals that meet the specified high (VIH) and low (VIL) voltage levels.
    • Ensure input signals do not exceed the maximum ratings to avoid damage to the device.

  3. Output Signals:

    • The output high (VOH) and low (VOL) voltages should be within the specified ranges when driving the load.
    • Do not exceed the maximum output current (IO) to prevent overheating or damage.

  4. Propagation Delay:

    • The propagation delay time (tpd) is the time it takes for a change at the input to affect the output. It is typically 35ns with a maximum of 60ns at 5V and 25°C.

  5. Temperature Considerations:

    • Operate the device within the specified operating temperature range (-55°C to 125°C).
    • Store the device within the storage temperature range (-65°C to 150°C).

  6. Power Dissipation:

    • Ensure the power dissipation (PD) does not exceed 500mW to maintain reliable operation and prevent overheating.

  7. Handling:

    • Handle the device with care to avoid static discharge, which can damage the internal components.
    • Use appropriate ESD protection measures during handling and installation.

  8. Mounting:

    • Mount the device on a PCB with proper thermal management if necessary, especially in high-power applications.
    • Ensure good soldering connections to all pins for reliable performance.

  9. Testing:

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

By following these instructions, you can ensure the SN74LS247N operates reliably and efficiently in your application.

(For reference only)

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