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85352AYILF датащи(PDF) 10 Page - Renesas Technology Corp |
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85352AYILF датащи(HTML) 10 Page - Renesas Technology Corp |
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10 / 21 page ![]() 10 ©2015 Integrated Device Technology, Inc. Revision C, December 1, 2015 85352 Datasheet 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 VPP and V CMR input requirements. Figures 3A to 3F show interface examples for the CLK/nCLK input driven by the most common driver types. The input interfaces suggested here are examples only. Please consult with the vendor of the driver component to confirm the driver termination requirements. For example in Figure 3A, the input termination applies for IDT LVHSTL drivers. If you are using an LVHSTL driver from another vendor, use their termination recommendation. Figure 3A. CLK/nCLK Input Driven by an IDT LVHSTL Driver Figure 3C. CLK/nCLK Input Driven by a 3.3V LVPECL Driver Figure 3E. CLK/nCLK Input Driven by a 3.3V HCSL Driver Figure 3B. CLK/nCLK Input Driven by a 3.3V LVPECL Driver Figure 3D. CLK/nCLK Input Driven by a 3.3V LVDS Driver Figure 3F. CLK/nCLK Input Driven by a 2.5V SSTL Driver R1 50 Ω R2 50 Ω 1.8V Zo = 50 Ω Zo = 50 Ω CLK nCLK 3.3V LVHSTL IDT LVHSTL Driver Differential Input HCSL *R3 *R4 CLK nCLK 3.3V 3.3V Differential Input CLK nCLK Differential Input SSTL 2.5V Zo = 60 Ω Zo = 60 Ω 2.5V 3.3V R1 120 Ω R2 120 Ω R3 120 Ω R4 120 Ω |
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