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ICS853S024 Scheda tecnica(PDF) 9 Page - Integrated Device Technology |
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ICS853S024 Scheda tecnica(HTML) 9 Page - Integrated Device Technology |
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9 / 16 page ![]() ICS853S024 LOW SKEW, 1-TO-24 DIFFERENTIAL-TO-3.3V, 2.5V LVPECL FANOUT BUFFER PRELIMINARY LOW SKEW LVPECL FANOUT BUFFER 9 ICS853S024AY REV. A APRIL 30, 2008 Termination for 2.5V LVPECL Outputs Figure 4A and Figure 4B show examples of termination for 2.5V LVPECL driver. These terminations are equivalent to terminating 50 Ω to V CC – 2V. For VCC = 2.5V, the VCC – 2V is very close to ground level. The R3 in Figure 4B can be eliminated and the termination is shown in Figure 4C. Figure 4A. 2.5V LVPECL Driver Termination Example Figure 4C. 2.5V LVPECL Driver Termination Example Figure 4B. 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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