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

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

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

+

–