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ICS853S031I датащи(PDF) 13 Page - Renesas Technology Corp |
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ICS853S031I датащи(HTML) 13 Page - Renesas Technology Corp |
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13 / 23 page ![]() ICS853S031I Data Sheet LOW SKEW, 1-TO-9, DIFFERENTIAL-TO-2.5V, 3.3V LVPECL/ECL FANOUT BUFFER ICS853S031BYI REVISION A AUGUST 17, 2011 13 ©2011 Integrated Device Technology, Inc. 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 Ω to VCCO – 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 Ω 50 Ω R1 250 R3 250 R2 62.5 R4 62.5 + – 2.5V LVPECL Driver VCCO = 2.5V 2.5V 50 Ω 50 Ω R1 50 R2 50 + – 2.5V LVPECL Driver VCCO = 2.5V 2.5V 50 Ω 50 Ω R1 50 R2 50 R3 18 + – |
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