JAJSF03K September 2011 – December 2023 LMK03806
PRODUCTION DATA
Before the LMK03806 is programmed some clocks will operate at default frequencies upon power up. The active output clocks depend upon the reference input type. If a crystal reference is used with OSCin, only CLKout8 will operate at a nominal VCO frequency /25. When an XO or other external reference is used as a reference with OSCin, OSCout0 will buffer the OSCin frequency in addition to CLKout8 operating at a nominal VCO frequency /25. These clocks can be used to clock external devices such as microcontrollers, FPGAs, CPLDs, and so forth, before the LMK03806 is programmed. Refer to Figure 7-5 or Figure 7-6 for illustration of start-up clocks.
The nominal VCO frequency of CLKout8 on power up will typically be 98 MHz.
Note during programming CLKout8 may momentarily stop or glitch during the VCO calibration routine.