• 參數(shù)資料
    型號(hào): TA8865BN
    元件分類: 接收器
    英文描述: AUDIO/VIDEO DEMODULATOR, PDIP36
    封裝: 0.500 INCH, 1.78 MM PITCH, SHRINK, PLASTIC, DIP-36
    文件頁(yè)數(shù): 25/27頁(yè)
    文件大小: 571K
    代理商: TA8865BN
    TA8865BN
    2001-02-21 7/27
    PIN
    No.
    PIN NAME
    FUNCTION
    INTERFACE CIRCUIT
    23
    MODE SEL
    For switching between SIF inputs A and B in L
    mode (pin 35 : 3.5~6.5V), and switching AFT
    output polarity. For details see the mode table
    on page 10.
    24
    LOCK Filter
    PLL synchronous detection circuit filter ;
    distinguishes that signal is inputted or not by
    detection of average of PIF output signal.
    Pin voltage is approximately 2V (narrow pull-in)
    when signal is inputted and approximately 4V
    (broad pull-in) with no signal.
    At no signal, pin voltage can be used to apply
    AFT mute.
    25
    26
    PIF VCO1
    PIF VCO2
    For PLL VCO tank coil for PIF ; VCO frequency
    is adjusted by changing the variable capacitance
    in the IC.
    When the resonance circuit has capacitor of
    27pF the frequency should be adjusted to
    approximately 3MHz.
    27
    VCO GND
    Ground for the VCO circuit
    28
    LOOP Filter
    PLL loop filter of the PIF detection ; This IC has
    a built-in circuit for changing the loop filter time
    constant. Keyed APC is applied in L mode,
    full-time APC in BG mode.
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