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PRELIMINARY
Integrated Circuit Systems, Inc.
ICS844021I-01
FEMTOCLOCKS™ CRYSTAL-TO- LVDS CLOCK GENERATOR
FEATURES
• (1) Differential LVDS output • Crystal oscillator interface, 18pF parallel resonant crystal (24.5MHz - 34MHz) • Output frequency range: 122.5MHz - 170MHz • VCO range: 490MHz - 680MHz • RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.45ps (typical) • 3.3V or 2.5V operating supply • -40°C to 85°C ambient operating temperature
GENERAL DESCRIPTION
The ICS844021I-01 is an Ethernet Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS. The ICS844021I-01 uses an 18pF parallel resonant crystal over the range of 24.5MHz - 34MHz. For Ether net applications, a 25MHz crystal is used.