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lmk00105

Ivan Ivanov1
Prodigy 30 points
Other Parts Discussed in Thread: LMK00105

Hello,

The lmk00105 has the OSCin pin. May be this pin driven by CMOS or LVCMOS signal? How are OSCin and OSCout pins connecting in this case?

  • 0
    TI__Mastermind 32575 points

    From the datasheet application information section 14.1:

    If the crystal oscillator circuit is not used, it is possible to drive the OSCin input with an single-ended external clock as shown in Figure 7. Configurations similar to Figure 4 or Figure 5 could also be used as long as the OSCout pin is left floating. The input clock should be AC coupled to the OSCin pin, which has an internally generated input bias voltage, and the OS- Cout pin should be left floating. While OSCin provides an alternative input to multiplex an external clock, it is recommended to use either differential input (CLKin) since it offers higher operating frequency, better common mode, improved power supply noise rejection, and greater performance over supply voltage and temperature variations. 

    Regards,

    Alan

  • 0
    TI__Intellectual 915 points

    The OSCin pin may be driven by CMOS or LVCMOS as long as the input voltage does not exceed 2.5V.  The OSCout pin should be left floating as recommended in Figure 7 of the datasheet.

    Regards,

    Jon