Elec-component
74HCT244N
74HCT244N

 

74HCT244N

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

BUY 74HCT244N https://www.utsource.net/itm/p/15188.html
Octal buffer, line driver; 3-state - Description: Octal Buffer/Line Driver; Non-Inverting; TTL Enabled 3-State ; Logic switching levels: TTL ; Number of pins: 20 ; Output drive capability: +/- 6 mA ; Power dissipation considerations: Low Power ; Propagation delay: 11 ns; Voltage: 4.5-5.5V

Below is the parameter table and instructions for the 74HCT244N octal buffer/line driver.

74HCT244N Parameter Table

Parameter Symbol Min Typ Max Unit Conditions
Supply Voltage VCC 2.0 5.0 6.0 V
Input Low Voltage VIL 0.0 0.8 1.5 V VCC = 4.5V to 5.5V
Input High Voltage VIH 3.5 4.0 5.0 V VCC = 4.5V to 5.5V
Output Low Voltage (Sink) VOL 0.0 0.1 0.4 V IOL = -4mA, VCC = 4.5V to 5.5V
Output High Voltage (Source) VOH 4.5 4.9 5.0 V IOH = 0.4mA, VCC = 4.5V to 5.5V
Input Leakage Current IIL -1.0 0 1.0 μA VCC = 4.5V to 5.5V
Output Leakage Current IOL -1.0 0 1.0 μA VCC = 4.5V to 5.5V
Propagation Delay Time tpd 5 10 15 ns VCC = 5.0V, TA = 25°C
Power Dissipation PD - - 100 mW Per output, VCC = 5.0V
Operating Temperature Range TA -40 25 85 °C Commercial Grade
Storage Temperature Range TSTG -65 - 150 °C

Instructions for 74HCT244N

  1. Pin Configuration:

    • 1-8, 14-21: Data Inputs (A1-A8, B1-B8)
    • 9, 13: Output Enable (OE1, OE2)
    • 10-17, 2-9: Data Outputs (Y1-Y8, Z1-Z8)
    • 18: VCC
    • 19: GND

  2. Operation:

    • The 74HCT244N is an octal buffer/line driver with two sets of 4-bit buffers.
    • Each set has its own output enable (OE) pin.
    • When OE is low, the corresponding outputs are active and follow the inputs.
    • When OE is high, the corresponding outputs are in a high-impedance state (tristate).

  3. Power Supply:

    • Connect VCC to the positive supply voltage (2.0V to 6.0V).
    • Connect GND to the ground.

  4. Input and Output Handling:

    • Ensure that input voltages do not exceed the supply voltage range.
    • Outputs can source or sink up to 25mA per pin, but the total power dissipation should not exceed 100mW per output.

  5. Temperature Considerations:

    • Operate the device within the specified temperature range to ensure reliable performance.
    • Store the device in the recommended storage temperature range to avoid damage.

  6. Layout and PCB Design:

    • Use short and wide traces for power and ground lines to minimize noise and improve stability.
    • Place decoupling capacitors (0.1μF) close to the VCC and GND pins to filter out high-frequency noise.

  7. Handling:

    • Handle the device with care to avoid static discharge, which can damage the internal circuits.
    • Use appropriate ESD protection when handling and soldering the device.

By following these parameters and instructions, you can effectively use the 74HCT244N in your digital circuit designs.

(For reference only)

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