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

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

2.5V

2.5V

50

Ω

50

Ω

R1

250

R3

250

R2

62.5

R4

62.5

+

–

2.5V LVPECL Driver

2.5V

50

Ω

50

Ω

R1

50

R2

50

+

–

2.5V LVPECL Driver

2.5V

50

Ω

50

Ω

R1

50

R2

50

R3

18

+

–