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ICS843207-350 Datasheet(PDF) 1 Page - Integrated Device Technology |
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ICS843207-350 Datasheet(HTML) 1 Page - Integrated Device Technology |
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1 / 16 page  FEMTOCLOCKS™ CRYSTAL-TO-LVPECL 350MHZ FREQUENCY MARGINING SYNTHESIZER ICS843207-350 IDT™ / ICS™ LVPECL FREQUENCY MARGINING SYNTHESIZER 1 ICS843207CY-350 REV. A DECEMBER 3, 2007 0 1 0 1 1 0 Phase Detector VCO 620 - 750MHz ÷50 ÷95 ÷105 OSC Predivider ÷2 2 00 HiZ 01 ÷2 10 ÷8 11 ÷4 2 00 HiZ 01 ÷2 10 ÷8 11 ÷4 2 00 HiZ 01 ÷2 10 ÷8 11 ÷4 2 00 HiZ 01 ÷2 10 ÷8 11 ÷4 2 00 HiZ 01 ÷2 10 ÷8 11 ÷4 2 00 HiZ 01 ÷2 10 ÷8 11 ÷4 2 00 HiZ 01 ÷2 10 ÷8 11 ÷4 0 1 Q0 nQ0 SEL[1:0] Q1 nQ1 SEL[3:2] Q2 nQ2 SEL[5:4] Q3 nQ3 SEL[7:6] Q4 nQ4 SEL[9:8] Q5 nQ5 SEL[11:10] Q6 nQ6 SEL[13:12] Pulldown Pulldown Pulldown Pulldown Pulldown nPLL_SEL XTAL_IN XTAL_OUT REF_CLK nXTAL_SEL MODE MARGIN MR Pulldown 14MHz Pullup Pullup Pullup Pullup Pullup Pullup Pullup To O/P Dividers GENERAL DESCRIPTION The ICS843207-350 is a lo w phase-noise frequency margining synthesizer that targets clocking for high perfor mance interfaces such as SPI4.2 and is a member of the HiPerClockS™ family of high performance clock solutions from IDT. In the default mode, each output can be configured individually to generate an 87.5MHz, 175MHZ or 350MHz LVPECL output clock signal from a 14MHz cr ystal input. There is also a frequency margining mode available where the device can be configured, using control pins, to var y the output frequency up or down from nominal by 5%. The ICS843207-350 is provided in a 48-pin LQFP package. FEATURES • Seven independently configurable LVPECL outputs at 87.5MHz, 175MHz or 350MHz • Individual high impedance control of each output • Selectable crystal oscillator interface designed for 14MHz, 18pF parallel resonant crystal or LVCMOS single-ended input • Output frequency can be varied ± 5% from nominal • VCO range: 620MHz - 750MHz • Full 3.3V supply mode • 0°C to 70°C ambient operating temperature • Available in both standard (RoHS 5) and lead-free (RoHS 6) packages HiPerClockS™ ICS BLOCK DIAGRAM VCCA VCC VCCO nQ6 Q6 VEE VCCO nQ5 Q5 nQ4 Q4 VCCO 48 47 46 45 44 43 42 41 40 39 38 37 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 36 35 34 33 32 31 30 29 28 27 26 25 VCCO Q0 nQ0 Q1 nQ1 VEE VCCO Q2 nQ2 Q3 nQ3 VCCO ICS843207-350 48-Pin LQFP 7mm x 7mm x 1.4mm package body Y Package Top View PIN ASSIGNMENT |
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