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ICS85314AMI-11T Datasheet(PDF) 9 Page - Integrated Circuit Systems |
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ICS85314AMI-11T Datasheet(HTML) 9 Page - Integrated Circuit Systems |
9 / 18 page 85314AGI-11 www.icst.com/products/hiperclocks.html REV. C MAY 24, 2005 9 Integrated Circuit Systems, Inc. ICS85314I-11 LOW SKEW, 1-TO-5 DIFFERENTIAL-TO-2.5V/3.3V LVPECL FANOUT BUFFER FIGURE 3C. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY 3.3V LVPECL DRIVER FIGURE 3B. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY 3.3V LVPECL DRIVER FIGURE 3D. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY 3.3V LVDS DRIVER 3.3V R1 50 R3 50 Zo = 50 Ohm LVPECL Zo = 50 Ohm HiPerClockS CLK nCLK 3.3V Input R2 50 Zo = 50 Ohm Input HiPerClockS CLK nCLK 3.3V R3 125 R2 84 Zo = 50 Ohm 3.3V R4 125 LVPECL R1 84 3.3V DIFFERENTIAL CLOCK INPUT INTERFACE The CLK /nCLK accepts LVDS, LVPECL, LVHSTL, SSTL, HCSL and other differential signals. Both V SWING and VOH must meet the V PP and VCMR input requirements. Figures 3A to 3E show interface examples for the HiPerClockS CLK/nCLK in- put driven by the most common driver types. The input inter- FIGURE 3A. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY ICS HIPERCLOCKS LVHSTL DRIVER faces suggested here are examples only. Please consult with the vendor of the driver component to confirm the driver termi- nation requirements. For example in Figure 3A, the input ter- mination applies for ICS HiPerClockS LVHSTL drivers. If you are using an LVHSTL driver from another vendor, use their termination recommendation. 1.8V R2 50 Input LVHSTL Driver ICS HiPerClockS R1 50 LVHSTL 3.3V Zo = 50 Ohm Zo = 50 Ohm HiPerClockS CLK nCLK FIGURE 3E. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY 3.3V LVPECL DRIVER WITH AC COUPLE Zo = 50 Ohm R3 125 HiPerClockS CLK nCLK 3.3V R5 100 - 200 3.3V R2 84 3.3V R6 100 - 200 Input R5,R6 locate near the driver pin. Zo = 50 Ohm R1 84 R4 125 C2 LVPECL C1 Zo = 50 Ohm R1 100 3.3V LVDS_Driv er Zo = 50 Ohm Receiv er CLK nCLK 3.3V |
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