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ICS44002I-01

ICS
Part Number ICS44002I-01
Manufacturer ICS
Description CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER
Published Oct 10, 2007
Detailed Description www.DataSheet4U.com Integrated Circuit Systems, Inc. ICS844002I-01 FEMTOCLOCKS™ CRYSTAL-TOLVDS FREQUENCY SYNTHESIZER F...
Datasheet PDF File ICS44002I-01 PDF File

ICS44002I-01
ICS44002I-01

Overview
www.
DataSheet4U.
com Integrated Circuit Systems, Inc.
ICS844002I-01 FEMTOCLOCKS™ CRYSTAL-TOLVDS FREQUENCY SYNTHESIZER FEATURES • Two LVDS outputs • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input • Supports the following output frequencies: 156.
25MHz, 125MHz, 62.
5MHz • VCO range: 560MHz - 680MHz • RMS phase jitter @ 156.
25MHz, using a 25MHz crystal (1.
875MHz - 20MHz): 0.
41ps (typical) • Full 2.
5V supply mode • -40°C to 85°C ambient operating temperature • Available in both, standard and RoHS/Lead-Free compliant packages GENERAL DESCRIPTION The ICS844002I-01 is a 2 output LVDS Synthesizer optimized to generate Ethernet HiPerClockS™ reference clock frequencies and is a member of the HiPerClocks T M family of high performance clock solutions from ICS.
Using a 25MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL[1:0]): 156.
25MHz, 125MHz and 62.
5MHz.
The ICS844002I-01 uses ICS’ 3 rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting Ethernet jitter requirements.
The ICS844002I-01 is packaged in a small 20-pin TSSOP package.
IC S FREQUENCY SELECT FUNCTION TABLE F_SEL1 F_SEL0 0 0 1 1 0 1 0 1 M Divider Value 25 25 25 Not Used N Divider Value 4 5 10 Output Frequency (MHz) (25MHz Reference) 156.
25 125 62.
5 Not Used PIN ASSIGNMENT nc VDDO Q0 nQ0 MR nPLL_SEL nc VDDA F_SEL0 VDD 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VDDO Q1 nQ1 GND VDD nXTAL_SEL REF_CLK XTAL_IN XTAL_OUT F_SEL1 ICS844002I-01 BLOCK DIAGRAM F_SEL[1:0] Pulldown nPLL_SEL Pulldown REF_CLK Pulldown 25MHz 2 20-Lead TSSOP 6.
5mm x 4.
4mm x 0.
92mm package body G Package Top View Q0 1 1 F_SEL[1:0] 0 0 ÷4 0 1 ÷5 10 11 ÷10 not used nQ0 XTAL_IN OSC XTAL_OUT nXTAL_SEL Pulldown 0 Phase Detector VCO 625MHz (w/25MHz Reference) 0 Q1 nQ1 M = 25 (fixed) MR Pulldown 844002AGI-01 www.
icst.
com/products/hiperclocks.
html 1 REV.
A JANUARY 5, 2006 Integ...


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