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ICS813001AGIT Datasheet(PDF) 1 Page - Integrated Circuit Systems |
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ICS813001AGIT Datasheet(HTML) 1 Page - Integrated Circuit Systems |
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1 / 18 page  813001AGI www.icst.com/products/hiperclocks.html REV. A SEPTEMBER 2, 2005 1 Integrated Circuit Systems, Inc. ICS813001I DUAL VCXO W/3.3V, 2.5V LVPECL FEMTOCLOCK™ PLL GENERAL DESCRIPTION The ICS813001I is a dual VCXO + FemtoClock™ Multiplier designed for use in Discrete PLL loops. Two selectable external VCXO crystals allow the device to be used in multi-rate appli- cations, where a given line card can be switched, for example, between 1Gb Ethernet (125MHz system reference clock) and 1Gb Fibre Channel (106.25MHz system reference clock) modes. Of course, a multitude of other applications are also possible such as switching between 74.25MHz and 74.175824MHz for HDTV, switching between SONET, FEC and non FEC rates, etc. The ICS813001I is a two stage device – a VCXO followed by a FemtoClock PLL. The FemtoClock PLL can multiply the crystal frequency of the VCXO to provide an output frequency range of 40.83MHz to 640MHz, with a random rms phase jitter of less than 1ps (12kHz – 20MHz). This phase jitter performance meets the requirements of 1Gb/ 10Gb Ethernet, 1Gb, 2Gb, 4Gb and 10Gb Fibre Channel, and SONET up to OC48. The FemtoClock PLL can also be bypassed if frequency multiplication is not required. For testing/debug purposes, de-assertion of the output enable pin will place both Q and nQ in a high impedance state. FEATURES • One 3.3V or 2.5V LVPECL output pair • Two selectable crystal oscillator interfaces for the VCXO, one differential clock or one LVCMOS/LVTTL clock inputs • CLK1/nCLK1 supports the following input types: LVPECL, LVDS, LVHSTL, SSTL, HCSL • Crystal operating frequency range: 14MHz - 24MHz • VCO range: 490MHz - 640MHz • Output frequency range: 40.83MHz - 640MHz • VCXO pull range: ±100ppm (typical) • Supports the following applications (among others): SONET, Ethernet, Fibre Channel, HDTV, MPEG • RMS phase jitter @ 622.08MHz (12kHz - 20MHz): 0.84 (typical) • Supply voltage modes: V CC/VCCO 3.3V/3.3V 3.3V/2.5V 2.5V/2.5V • -40°C to 85°C ambient operating temperature • Available in both, Standard and RoHS/Lead-Free compliant packages HiPerClockS™ ICS BLOCK DIAGRAM VCXO 1 0 (default) 1 1 0 0 0 1 PD VCO 490-640MHz 0 1 Feedback Divider M Output Divider N M2:M0 000 ÷16 001 ÷20 010 ÷22 011 ÷24 100 ÷25 (default) 101 ÷32 110 ÷40 111 MR N2:N0 000 ÷1 001 ÷2 010 ÷3 011 ÷4 (default) 100 ÷5 101 ÷6 110 ÷8 111 ÷12 PIN ASSIGNMENT ICS813001I 24-Lead TSSOP 4.40mm x 7.8mm x 0.92mm package body G Package Top View VCO_SEL N0 N1 N2 VCCO Q nQ VEE VCCA VCC XTAL_OUT1 XTAL_IN1 1 2 3 4 5 6 7 8 9 10 11 12 CLK_SEL1 CLK_SEL0 OE M2 M1 M0 CLK1 nCLK1 CLK0 VC XTAL_IN0 XTAL_OUT0 24 23 22 21 20 19 18 17 16 15 14 13 VCO_SEL CLK_SEL0 CLK_SEL1 CLK0 CLK1 nCLK1 VC M2 M1 M0 N2 N1 N0 OE Pullup Pullup Pullup Q nQ XTAL_IN0 XTAL_OUT0 XTAL_IN1 XTAL_OUT1 Pulldown Pulldown Pullup Pullup Pullup Pullup Pulldown Pulldown Pulldown Pulldown |
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