ICS843156 datasheet(12/21 Pages) RENESAS

Part #	ICS843156

Description	Crystal-to-LVPECL Clock Synthesizer

PDF	21 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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12 / 21 page

ICS843156AK REVISION B May 26, 2016

ICS843156 Data Sheet

CRYSTAL-TO-LVPECL CLOCK SYNTHESIZER

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



to VCCO – 2V. For VCCO = 2.5V, the VCCO – 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

VCCO = 2.5V

2.5V



250

62.5

–

2.5V LVPECL Driver

VCCO = 2.5V

2.5V



–

2.5V LVPECL Driver

VCCO = 2.5V

2.5V



–

ICS843156 Datasheet(PDF) 12 Page - Renesas Technology Corp