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ICS853014BGL 数据表(PDF) 12 Page - Integrated Device Technology |
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ICS853014BGL 数据表(HTML) 12 Page - Integrated Device Technology |
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12 / 19 page ![]() ICS853014 LOW SKEW, 1-TO-5, DIFFERENTIAL-TO-2.5V, 3.3V LVPECL/ECL FANOUT BUFFER IDT™ / ICS™ 2.5V, 3.3V LVPECL/ECL FANOUT BUFFER 12 ICS853014BG REV. DNOVEMBER 12, 2007 Termination for 2.5V LVPECL Outputs Figure 5A and Figure 5B 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 5B can be eliminated and the termination is shown in Figure 5C. Figure 5A. 2.5V LVPECL Driver Termination Example Figure 5C. 2.5V LVPECL Driver Termination Example Figure 5B. 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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