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ICS557GI-03 Datasheet(PDF) 1 Page - Integrated Circuit Systems |
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ICS557GI-03 Datasheet(HTML) 1 Page - Integrated Circuit Systems |
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1 / 9 page  ICS557-03 MDS 557-03 E 1 Revision 061005 Integrat ed Circuit Systems ● 525 Race Stre et, San Jo se, CA 9 5126 ● te l (40 8 ) 2 97-12 01 ● www.ics t.co m PCI-EXPRESS CLOCK SOURCE Description The ICS557-03 is a spread spectrum clock generator supporting PCI-Express and Ethernet requirements. The device is used for PC or embedded systems to substantially reduce electromagnetic interference (EMI). The device provides two differential (HCSL) spread spectrum outputs. This device is pin configured to select spread and clock selection. Using ICS’ patented Phase-Locked Loop (PLL) techniques, the device takes a 25 MHz crystal input and produces two pairs of differential outputs (HCSL) at 25 MHz, 100 MHz, 125 MHz and 200 MHz clock frequencies. It also provides spread selection of ±0.25%, -0.5%, -0.75%, and no spread. Features • Packaged in 16-pin TSSOP • Available in Pb (lead) free package • Supports LVDS Output Levels • Operating voltage of 3.3 V • Input frequency of 25 MHz • Outputs (HCSL, 0.7 V Current mode differential pair) • Jitter 100 ps (peak-to-peak) • Spread of ±0.25%, -0.5%, -0.75%, and no spread. • Industrial and commercial temperature ranges Block Diagram Phase Lock Loop Clock Buffer/ Crystal Oscillator VDD GND X1/ICLK X2 25 MHz crystal or clock Control Logic SS1:SS0 2 S1:S0 2 CLK0 CLK0 Rr(IREF) CLK1 CLK1 2 2 OE Optional tuning crystal capacitors |
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