General Description

The 844071 is a Serial ATA (SATA)/Serial Attached SCSI (SAS)

Clock Generator. 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.

Features

• 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) packages