8T33FS6221 datasheet(14/23 Pages) RENESAS

Part #	8T33FS6221

Description	Low Voltage 1:20 Differential PECL/HSTL Clock Fanout Buffer

PDF	23 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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8T33FS6221 DATASHEET

LOW VOLTAGE 1:20 DIFFERENTIAL PECL/HSTL CLOCK

FANOUT BUFFER

R31DS0008EU0110 Rev.1.1 Apr 8, 2021

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 VCC – 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 5B. 2.5V LVPECL Driver Termination Example

Figure 5C. 2.5V LVPECL Driver Termination Example

2.5V LVPECL Driver

VCC = 2.5V

2.5V

250

62.5

–

2.5V LVPECL Driver

VCC = 2.5V

2.5V

–

2.5V LVPECL Driver

VCC = 2.5V

2.5V

–

8T33FS6221 Datasheet(PDF) 14 Page - Renesas Technology Corp