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ICS843034 Fiches technique(PDF) 21 Page - Renesas Technology Corp |
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ICS843034 Fiches technique(HTML) 21 Page - Renesas Technology Corp |
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21 / 31 page ![]() 21 © Integrated Device Technology, Inc December 2, 2015 843034 DATA SHEET Termination for 2.5V LVPECL Outputs Figure 6A and Figure 6B show examples of termination for 2.5V LVPECL driver. These terminations are equivalent to terminating 50 to VCC O – 2V. For VCCO = 2.5V, the VCCO – 2V is very close to ground level. The R3 in Figure 6B can be eliminated and the termination is shown in Figure 6C. Figure 6A. 2.5V LVPECL Driver Termination Example Figure 6C. 2.5V LVPECL Driver Termination Example Figure 6B. 2.5V LVPECL Driver Termination Example 2.5V LVPECL Driver VCCO = 2.5V 2.5V 2.5V 50 50 R1 250 R3 250 R2 62.5 R4 62.5 + – 2.5V LVPECL Driver VCCO = 2.5V 2.5V 50 50 R1 50 R2 50 + – 2.5V LVPECL Driver VCCO = 2.5V 2.5V 50 50 R1 50 R2 50 R3 18 + – |
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