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ICS844246I

Integrated Device Technology
Part Number ICS844246I
Manufacturer Integrated Device Technology
Description FEMTOCLOCKS CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER
Published Mar 13, 2011
Detailed Description PRELIMINARY FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER ICS844246I GENERAL DESCRIPT...
Datasheet PDF File ICS844246I PDF File

ICS844246I
ICS844246I

Overview
PRELIMINARY FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER ICS844246I GENERAL DESCRIPTION The ICS844246I is a Cr ystal-to-LVDS Clock Synthesizer/Fanout Buffer designed for Fibre HiPerClockS™ Channel and Gigabit Ethernet applications and is a member of the HiperClockS™ family of High Performance Clock Solutions from IDT.
The output frequency can be set using the frequency select pins and a 25MHz crystal for Ethernet frequencies, or a 26.
5625MHz crystal for a Fibre Channel.
The low phase noise characteristics of the ICS844246I make it an ideal clock for these demanding applications.
FEATURES • Six LVDS outputs • Crystal oscillator interface • Output frequency range: 53.
125MHz to 333.
3333MHz • Crystal input frequency range: 25MHz to 33.
333MHz • RMS phase jitter at 125MHz, using a 25MHz crystal (1.
875MHz to 20MHz): 0.
39ps (typical) • Full 3.
3V or 3.
3V core, 2.
5V output supply mode • -40°C to 85°C ambient operating temperature • Available in both standard (RoHS 5) and lead-free (RoHS 6) packages Function IC S SELECT FUNCTION TABLE Inputs FB_SEL 0 0 0 0 1 1 1 1 N_SEL1 0 0 1 1 0 0 1 1 N_SEL0 0 1 0 1 0 1 0 1 M Divide 20 20 20 20 24 24 24 24 N Divide 2 4 5 8 3 4 6 12 M/N 10 5 4 2.
5 8 6 4 2 BLOCK DIAGRAM Q0 nQ0 PLL_BYPASS Pullup PIN ASSIGNMENT VDDO VDDO nQ2 Q2 nQ1 Q1 nQ0 Q0 PLL_BYPASS VDDA VDD FB_SEL 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 Q3 nQ3 Q4 nQ4 Q5 nQ5 N_SEL1 GND GND N_SEL0 XTAL_OUT XTAL_IN Q1 1 XTAL_IN XTAL_OUT nQ1 OSC PLL 0 Output Divider Q2 nQ2 Q3 nQ3 Q4 nQ4 Q5 nQ5 Feedback Divider FB_SEL N_SEL1 Pulldown ICS844246I 24-Lead TSSOP, E-Pad 4.
40mm x 7.
8mm x 0.
90mm body package G Package Top View www.
DataSheet4U.
com Pullup N_SEL0 Pullup The Preliminary Information presented herein represents a product in pre-production.
The noted characteristics are based on initial product characterization and/or qualification.
Integrated Device Technology, Incorporated (IDT) reserves the right to change any circu...


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