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    參數(shù)資料
    型號(hào): 74HCT
    廠商: NXP Semiconductors N.V.
    英文描述: HCMOS family characteristics
    中文描述: HCMOS家庭特征
    文件頁數(shù): 11/19頁
    文件大?。?/td> 88K
    代理商: 74HCT
    March 1988
    11
    Philips Semiconductors
    HCMOS family characteristics
    FAMILY SPECIFICATIONS
    Test circuit for 74HC
    AC waveforms 74HC (continued)
    C
    L
    =
    load capacitance including jig and probe capacitance
    (see AC CHARACTERISTICS for values).
    R
    T
    =
    termination resistance should be equal to the output impedance Z
    o
    of
    the pulse generator.
    Fig.5 Test circuit.
    handbook, halfpage
    MGK565
    PULSE
    GENERATOR
    D.U.T
    VCC
    VI
    VO
    RT
    CL
    50 pF
    Fig.6 Propagation delays of 3-state outputs.
    handbook, full pagewidth
    MGK562
    tPLZ
    tPHZ
    outputs
    disabled
    outputs
    enabled
    90%
    10%
    10%
    90%
    50%
    outputs
    enabled
    OUTPUT
    LOW-to-OFF
    OFF-to-LOW
    OUTPUT
    HIGH-to-OFF
    OFF-to-HIGH
    OUTPUT
    ENABLE
    VCC
    GND
    tPZL
    tf
    tr
    tPZH
    50%
    50%
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    參數(shù)描述
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