ICS840022 Datasheet | Integrated Circuit Systems

PRELIMINARY Integrated Circuit Systems, Inc. FEMTOCLOCKS™CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR Features - 1 LVCMOS/LVTTL output, 7Ω output impedence - Crystal oscillator interface designed for 25MHz, 18p F parallel resonant crystal - Output frequencies: 125MHz or 62.5MHz (selectable) - RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.55ps (typical) - RMS phase noise at 125MHz: Offset Noise Power 100Hz .............. -106.3 d Bc/Hz 1KHz .............. -126.3 d Bc/Hz 10KHz .............. -131.7 d Bc/Hz 100KHz .............. -130.8 d Bc/Hz - 3.3V operating supply - 0°C to 70°C ambient operating temperature - Industrial temperature information available upon request GENERAL DESCRIPTION The ICS840022 is a Gigabit Ethernet Clock Generator and a member of the Hi Per Clocks TM Hi Per Clock S™ family of high performance devices from ICS. The ICS840022 uses a 25MHz crystal to synthesize 125MHz or 62.5MHz. The ICS840022 has excellent phase jitter performance, over the 1.875MHz - 20MHz integration range. The ICS840022 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. .. FUNCTION TABLE Inputs FREQ_SEL 0 1 Output Frequencies (with a 25MHz crystal) 125MHz 62.5MHz BLOCK DIAGRAM OE FREQ_SEL PIN ASSIGNMENT VDDA OE XTAL_OUT XTAL_IN 1 2 3 4 8 7 6 5 VDD Q0 GND FREQ_SEL XTAL_IN XTAL_OUT Phase Detector 560MHz-680MHz w/25MHz Ref. ÷5 Q0 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top...