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ICS002AI41L датащи(PDF) 15 Page - Integrated Device Technology |
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ICS002AI41L датащи(HTML) 15 Page - Integrated Device Technology |
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15 / 23 page ![]() ICS843002I-41 700MHZ, FEMTOCLOCKS™ VCXO BASED SONET/SDH JITTER ATTENUATOR IDT™ / ICS™ VCXO BASED SONET/SDH JITTER ATTENUATOR 15 ICS843002AKI-41 REV. A OCTOBER 25, 2007 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 V CCO – 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 VCC = 2.5V 2.5V 2.5V 50 Ω 50 Ω R1 250 R3 250 R2 62.5 R4 62.5 + – 2.5V LVPECL Driver VCC = 2.5V 2.5V 50 Ω 50 Ω R1 50 R2 50 + – 2.5V LVPECL Driver VCC = 2.5V 2.5V 50 Ω 50 Ω R1 50 R2 50 R3 18 + – |
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