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844201BKI-45LF Datasheet(PDF) 1 Page - Integrated Device Technology |
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844201BKI-45LF Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 16 page DATASHEET FemtoClock® Crystal-to-LVDS Clock Generator ICS844201I-45 ICS844201BKI-45 MAY 27, 2017 1 ©2017 Integrated Device Technology, Inc. General Description The ICS844201I-45 is a PCI ExpressTM Clock Generator. The ICS844201I-45 can synthesize 100MHz or 125MHz reference clock frequencies with a 25MHz crystal. The ICS844201I-45 has excellent phase jitter performance and is packaged in a small 16-pin VFQFN, making it ideal for use in systems with limited board space. Features • One differential LVDS output pair • Crystal oscillator interface designed for 18pF, 25MHz parallel resonant crystal • VCO range: 490MHz – 680MHz • RMS phase jitter at 100MHz (12kHz – 20MHz): 0.792ps (typical) • RMS phase jitter at 125MHz (12kHz – 20MHz): 0.773ps (typical) • Full 3.3V output supply mode • PCI Express (2.5Gb/s) and Gen 2 (5Gb/S) jitter compliant • -40°C to 85°C ambient operating temperature • Lead-free (RoHS 6) packaging Frequency Table Inputs Output Frequency Range (MHz) Crystal Frequency (MHz) M FSEL N Multiplication Value M/N 25 20 1 4 5 125 (default) 25 20 0 5 4 100 5 6 7 8 16 15 14 13 1 2 3 4 12 11 10 9 nc XTAL_OUT XTAL_IN FSEL Q nQ VDD nc Pin Assignment OSC Phase Detector VCO 490MHz - 680MHz M = ÷20 (fixed) N = ÷5 ÷4 (default) Q nQ Pullup XTAL_IN XTAL_OUT FSEL Block Diagram ICS844201I-45 16-Lead VFQFN Top View |
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