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        參數(shù)資料
        型號: VCLGLDAT16MHZ
        廠商: VECTRON INTERNATIONAL
        元件分類: XO, clock
        英文描述: VCXO, CLOCK, 16 MHz, CMOS/TTL OUTPUT
        文件頁數(shù): 2/8頁
        文件大?。?/td> 250K
        代理商: VCLGLDAT16MHZ
        V-Type Voltage Controlled Crystal Oscillator (VCXO)
        Vectron International 166 Glover Avenue, Norwalk, CT 06856 Tel: 1-88-VECTRON-1 Fax: 1-888-FAX-VECTRON
        Pin Information
        Table 1.
        1
        Vc
        Control Voltage.
        22
        TTL/CMOS1
        TTL logic low for CMOS optimized symmetry
        TTL logic high or no connection for TTL optimized symmetry.
        3
        GND
        Case/circuit ground.
        4
        Output
        Output waveform.
        52
        Tri-state
        TTL logic low diables output.
        TTL logic high or no connection enables output waveform.
        6VDD
        Supply Voltage, 5 V ±10%, or 3.3V ±10%
        Pin #
        Symbol
        Name/Function
        1. This silicon oscillator is fabricated in CMOS technology and
        its output waveform will swing between ground and VDD for
        all but the highest frequency applications. To account for the
        difference in switching thresholds between TTL logic (1.40 V)
        and CMOS logic (VDD/2), the TTL/CMOS lead modifies the
        “on time” of the oscillator for maximum symmetry about the
        TTL or CMOS logic threshold. TTL logic low provides wave-
        form symmetry for CMOS. TTL logic high or no connection pro-
        vides waveform symmetry for TTL. At output frequencies less
        than 12 MHz, this option is not provided as the waveform tran-
        sition times are small compared to the period. Hence, for fo
        <12 MHz this pin should be grounded for electrical isolation.
        2. Alternate Pin Configuration for Tri-state Control on Pin 2
        and TTL/CMOS on pin 5. Alternate Configuration is indicated
        by last letter of part code “D” for TriState Pin 2 and TTL/CMOS
        on pin 5.
        Table 2. Performance Specifications
        1 A 0.1 uF low frequency tantalum bypass capacitor in parallel with a
        0.01 uF high-frequency ceramic capacitor is recommended.
        2 Figure 1 defines these parameters. Figure 2 illustrates the equiva-
        lent five-gate MTTL load and operating conditions under which
        these parameters are specified.
        3 Symmetry is defined as (ON TIME/PERIOD), with VS = 1.4 V for
        TTL or VS = 2.5 V for CMOS. per Figure 1.
        Supply Voltage’ (5V or 3.3V)
        VDD
        0.9*VDD
        1.1*VDD
        V
        Supply Current (Frequency Dependent)
        IDD
        See Figures 7,8
        mA
        OutputVoltage Levels (VDD = 4.5V):
        Output Logic High 2
        VOH
        0.8*VDD
        -V
        Output Logic Low 2
        VOL
        -
        0.1*VDD
        V
        Transition Times 2:
        Rise Time
        tR
        5ns
        Fall Time
        tF
        5ns
        Symmetry or Duty Cycle3
        SYM
        See figure 3, 4
        %
        Nominal Output Frequency (see ordering info)
        fo
        1.024
        77.760
        MHz
        Control Voltage (5v), test conditions for APR
        Vc
        0.5
        4.5
        V
        Control Voltage (3.3v), test conditions for APR
        Vc
        0.3
        3.0
        V
        Control Voltage
        Vc
        0VDD
        V
        Absolute Pull Range (see ordering info)
        APR
        ±20 to ±100
        Leakage Current of Control Input
        Ivcxo
        -1.0
        1.0
        uA
        Control Voltage Bandwidth (-3 dB,VC=2.50V)
        BW
        10
        -
        kHz
        Parameter
        Symbol
        Min
        Max
        Unit
        2
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