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Original question:

LMK05318: 1PPS from gps for create a 640 Hz clock output

LMK05318: AC OUTPUT CHARACTERISTICS

XiaoTao Ng
Intellectual 420 points
Part Number: LMK05318
Other Parts Discussed in Thread: LMK04808

Hi,LMK05318 Team:

   As we all know that AC output frequency is 800Mhz max. But Note (5) tells that :"An output frequency over fOUT max spec is possible, but output swing may be less than VOD min specification"

   Can TI provide the worst output swing on frequency 1000Mhz and 1200Mhz ?  we need know the worst swing in order to select the optimal buffer for it .

  

  • 0
    TI__Genius 9920 points

    TI didn't characterize it on LMK05318.

    But you can refer to LMK04808 "6.7 Typical Characteristics: Clock Output AC Characteristics", just feel the Vod and frequency relationship in output drivers. The value is not exact as LMK05318.

    Notice LMK05318 AC-LVPECL VOD Output voltage swing (VOH - VOL):  (TYP at fOUT = 156.25 MHz), Min 500 , Typ. 800 ,  Max 1000 mV