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ICS844003I

ICS
Part Number ICS844003I
Manufacturer ICS
Description CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER
Published Oct 2, 2007
Detailed Description www.DataSheet4U.com PRELIMINARY Integrated Circuit Systems, Inc. ICS844003I FEMTOCLOCKS™CRYSTAL-TO-LVDS FREQUENCY SY...
Datasheet PDF File ICS844003I PDF File

ICS844003I
ICS844003I

Overview
www.
DataSheet4U.
com PRELIMINARY Integrated Circuit Systems, Inc.
ICS844003I FEMTOCLOCKS™CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER FEATURES • Three LVDS outputs on two banks, A Bank with one LVDS pair and B Bank with 2 LVDS output pairs • Using a 31.
25MHz or 26.
041666MHz crystal, the two output banks can be independently set for 625MHz, 312.
5MHz, 156.
25MHz or 125MHz • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input • VCO range: 560MHz to 700MHz • RMS phase jitter @ 156.
25MHz (1.
875MHz - 20MHz): 0.
63ps (typical) • 3.
3V output supply mode • -40°C to 85°C ambient operating temperature • Available in both standard and lead-free RoHS-compliant packages GENERAL DESCRIPTION The ICS844003I is a 3 differential output LVDS Synthesizer designed to generate Ethernet referHiPerClockS™ ence clock frequencies and is a member of the HiPerClocks™ family of high performance clock solutions from ICS.
Using a 31.
25MHz or 26.
041666MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the settings of 4 frequency select pins (DIV_SEL[A1:A0], DIV_SEL[B1:B0]): 625MHz, 312.
5MHz, 156.
25MHz, and 125MHz.
The 844003I has 2 output banks, Bank A with 1 differential LVDS output pair and Bank B with 2 differential LVDS output pairs.
IC S The two banks have their own dedicated frequency select pins and can be independently set for the frequencies mentioned above.
The ICS844003I uses ICS’ 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements.
The ICS844003I is packaged in a small 24-pin TSSOP package.
PIN ASSIGNMENT DIV_SELB0 VCO_SEL MR VDDO_A QA0 nQA0 CLK_ENB CLK_ENA FB_DIV VDDA VDD DIV_SELA0 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 DIV_SELB1 VDDO_B QB0 nQB0 QB1 nQB1 XTAL_SEL TEST_CLK XTAL_IN XTAL_OUT GND DIV_SELA1 BLOCK DIAGRAM CLK_ENA Pullup DIV_SELA[1:0] VCO_SEL Pullup ICS844003I 24-Lead TSSOP 4.
40mm x 7.
8mm x 0.
92mm pac...


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