ZHCS810H January 2012 – February 2018 DS125DF410
PRODUCTION DATA.
REFCLK_IN pin 19 is for reference clock input. A 25 MHz oscillator should be connected to pin 19. See Electrical Characteristics for the requirements on the 25 MHz clock. The frequency of the reference clock should always be 25 MHz no matter what data rate or mode of operation is used.