The 844071 is a Serial ATA (SATA)/Serial Attached SCSI (SAS) Clock Generator and a member of the family of high performance devices from IDT. The 844071 uses an 18pF parallel resonant crystal over the range of 20.833MHz - 28.3MHz. For SATA/SAS applications, a 25MHz crystal is used and either 75MHz or 150MHz may be selected with the FREQ_SEL pin. The 844071 has excellent <1ps phase jitter performance, over the 900kHz - 7.5MHz integration range. The 844071 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.


  • One differential LVDS output
  • Crystal oscillator interface, 18pF parallel resonant crystal (20.833MHz – 28.3MHz)
  • Output frequency range: 62.5MHz – 170MHz
  • VCO range: 500MHz – 680MHz
  • RMS phase jitter at 150MHz, using a 25MHz crystal (900kHz – 7.5MHz): 0.45ps (typical)
  • Full 3.3V or 2.5V operating supply
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) package




Design & Development