ICS844051I Datasheet | ICS

FEATURES - One Differential LVDS output - Crystal oscillator interface designed for 18p F parallel resonant crystals (18.125MHz - 23.4375MHz) - Output frequency range: 145MHz - 187.5MHz and 72.5MHz - 93.75MHz - VCO range: 580MHz - 750MHz - RMS phase jitter @156.25MHz (1.875MHz - 20MHz): 0.45ps (typical) - 3.3V or 2.5V operating supply - -40°C to 85°C ambient operating temperature - Available in both standard and lead-free Ro HS-pliant packages GENERAL DESCRIPTION The ICS844051I 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 ICS844051I can synthesize 10 Gigabit Ethernet, SONET, or Serial ATA reference clock frequencies with the appropriate choice of crystal and output divider. The ICS844051I has excellent phase jitter performance and is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. IC S FREQUENCY TABLE Inputs Crystal Frequency (MHz) 20.141601 20.141601 19.53125 19.53125 19.44 19.44 18.75 18.75 FREQ_SEL 0 1 0 1 0 1 0 1 Output Frequency (MHz) 161.132812 80.566406 156.25 78.125 155.52 77.76 15 0 75 BLOCK DIAGRAM FREQ_SEL XTAL_IN Pulldown PIN ASSIGNMENT 0 ÷4 (default) 1 ÷8 VDDA GND XTAL_OUT XTAL_IN 1 2 3 4 8 7 6 5 VDD Q n Q FREQ_SEL XTAL_OUT Phase Detector Q n Q ÷32 (fixed) 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice. 844051CGI .icst./products/hiperclocks.html REV. A NOVEMBER 23, 2005 PRELIMINARY Integrated Circuit Systems, Inc. ICS844051I FEMTOCLOCKS™ CRYSTAL-TO- LVDS CLOCK GENERATOR TABLE 1. PIN DESCRIPTIONS Number 1 2 3, 4 5 6, 7 8 Name VDDA GND XTAL_OUT, XTAL_IN FREQ_SEL n Q, Q VDD Power...