ICS844201BG-45 REVISION A OCTOBER 1, 2013

9

©2013 Integrated Device Technology, Inc.

ICS844201-45 Data Sheet

LVDS Driver Termination

For a general LVDS interface, the recommended value for the

your transmission line. A typical point-to-point LVDS design uses a

100

 parallel resistor at the receiver and a 100 differential

transmission-line environment. In order to avoid any

transmission-line reflection issues, the components should be

surface mounted and 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 3A can be used

with either type of output structure. Figure 3B, which can also be

used with both output types, is an optional termination with center tap

capacitance to help filter common mode noise. The capacitor value

should be approximately 50pF. If using a non-standard termination, it

is recommended to contact IDT and confirm if the output structure is

current source or voltage source type. In addition, since these

outputs are LVDS compatible, the input receiver’s amplitude and

common-mode input range should be verified for compatibility with

the output.

LVDS Termination

LVDS

Driver

LVDS

Driver

LVDS

Receiver

LVDS

Receiver

C

2

2

Figure 3A. Standard Termination

Figure 3B. Optional Termination