ICS854110AKI REVISION B JANUARY 27, 2011

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©2011 Integrated Device Technology, Inc.

ICS854110I Data Sheet

2.5V DIFFERENTIAL LVDS CLOCK BUFFER

LVDS Driver Termination

A general LVDS interface is shown in Figure 4. Standard termination

for LVDS type output structure requires both a 100

Ω parallel resistor

at the receiver and a 100

Ω differential transmission line environment.

In order to avoid any transmission line reflection issues, the 100

Ω

resistor must be placed as close to the receiver as possible. IDT

offers a full line of LVDS compliant devices with two types of output

structures: current source and voltage source. The standard

termination schematic as shown in Figure 4 can be used with either

type of output structure. If using a non-standard termination, it is

recommended to contact IDT and confirm if the output is a current

source or a voltage source type structure. In addition, since these

outputs are LVDS compatible, the amplitude and common mode

input range of the input receivers should be verified for compatibility

with the output.

Figure 4. Typical LVDS Driver Termination

100

Ω

–

+

100

Ω Differential Transmission Line

LVDS Driver

LVDS

Receiver