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ICS853013AMLF Datasheet(PDF) 9 Page - Integrated Circuit Systems |
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ICS853013AMLF Datasheet(HTML) 9 Page - Integrated Circuit Systems |
9 / 17 page 853013AM www.icst.com/products/hiperclocks.html REV. A OCTOBER 19, 2005 9 Integrated Circuit Systems, Inc. ICS853013 LOW SKEW, DUAL, 1-TO-3, DIFFERENTIAL-TO- 2.5V/3.3V/5V LVPECL/ECL FANOUT BUFFER LVPECL CLOCK INPUT INTERFACE The PCLKx /nPCLKx accepts LVPECL, CML, SSTL and other differential signals. Both V SWING and VOH must meet the VPP and V CMR input requirements. Figures 2A to 2E show inter- face examples for the HiPerClockS PCLKx/nPCLKx input driven by the most common driver types. The input interfaces suggested here are examples only. If the driver is from an- other vendor, use their termination recommendation. Please consult with the vendor of the driver component to confirm the driver termination requirements. FIGURE 2A. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN BY A CML DRIVER FIGURE 2B. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN BY AN SSTL DRIVER FIGURE 2C. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN BY A 3.3V LVPECL DRIVER FIGURE 2D. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN BY A 3.3V LVDS DRIVER HiPerClockS PCLK nPCLK PCLK/nPCLK 3.3V R2 50 R1 50 3.3V Zo = 50 Ohm CML 3.3V Zo = 50 Ohm PCLK/nPCLK 2.5V Zo = 60 Ohm SSTL HiPerClockS PCLK nPCLK R2 120 3.3V R3 120 Zo = 60 Ohm R1 120 R4 120 2.5V FIGURE 2E. HIPERCLOCKS PCLK/nPCLK INPUT DRIVEN BY A 3.3V LVPECL DRIVER WITH AC COUPLE 3.3V R5 100 - 200 3.3V 3.3V HiPerClockS PCLK nPCLK R1 125 PCLK/nPCLK R2 125 R3 84 C1 C2 Zo = 50 Ohm R4 84 Zo = 50 Ohm R6 100 - 200 3.3V LVPECL 3.3V HiPerClockS PCLK nPCLK R2 84 R3 125 Input Zo = 50 Ohm R4 125 R1 84 LVPECL 3.3V 3.3V Zo = 50 Ohm C2 R2 1K R5 100 Zo = 50 Ohm 3.3V 3.3V C1 R3 1K LVDS R4 1K HiPerClockS PCLK nPCLK R1 1K Zo = 50 Ohm 3.3V PC L K /n PC LK |
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