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ICS844001I Datasheet(PDF) 1 Page - Integrated Circuit Systems |
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ICS844001I Datasheet(HTML) 1 Page - Integrated Circuit Systems |
1 / 10 page 844001AGI www.icst.com/products/hiperclocks.html REV. A JUNE 16, 2005 1 Integrated Circuit Systems, Inc. ICS844001I FEMTOCLOCKS™CRYSTAL-TO- LVDS CLOCK GENERATOR PRELIMINARY GENERAL DESCRIPTION The ICS844001I is a Fibre Channel Clock Generator and a member of the HiPerClocksTM family of high performance devices from ICS. The ICS844001I uses an 18pF parallel resonant crystal over the range of 20.4MHz - 28.3MHz. For Fibre Channel applications, a 26.5625MHz crystal is used. The frequency select pin allows the device to generate either 106.25MHz or 212.5MHz from a 26.5625MHz cr ystal. To generate 187.5MHz for 12Gb Ethernet, a 23.4375MHz crystal is used. The ICS844001I uses ICS’ 3rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting Fibre Channel and Ethernet jitter requirements. The ICS844001I is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. FEATURES • (1) Differential LVDS output • Crystal oscillator interface, 18pF parallel resonant crystal (20.4MHz - 28.3MHz) • Output frequency range: 81.66MHz - 226.66MHz • VCO range: 490MHz - 680MHz • RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal (637kHz - 10MHz): 0.74ps (typical) • 3.3V or 2.5V operating supply • -40°C to 85°C ambient operating temperature HiPerClockS™ ICS ICS844001I 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View VDDA GND XTAL_OUT XTAL_IN 1 2 3 4 VDD Q nQ FREQ_SEL 8 7 6 5 BLOCK DIAGRAM OSC Phase Detector VCO 490MHz - 680MHz M = ÷24 (fixed) ÷3 ÷6 1 0 XTAL_IN XTAL_OUT Q nQ COMMON CONFIGURATION TABLE - FIBRE CHANNEL, 12Gb ETHERNET PIN ASSIGNMENT FREQ_SEL s t u p n I y c n e u q e r F t u p t u O ) z H M ( ) z H M ( y c n e u q e r F l a t s y r CL E S _ Q E R FM N n o i t a c i l p i t l u M N / M e u l a V 5 2 6 5 . 6 20 4 26 4 5 2 . 6 0 1 5 2 6 5 . 6 21 4 23 8 5 . 2 1 2 5 7 3 4 . 3 21 4 23 8 5 . 7 8 1 Pullup The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice. |
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