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©2021 Renesas Electronics Corporation

R31DS0007EU0100 April 8, 2021

XT Datasheet

LVDS Output Termination

For a general LVDS interface, the recommended value for the termination impedance (ZT) is between 90Ω and 132Ω. The actual value

should be selected to match the differential impedance (Z0) of your transmission line. A typical point-to-point LVDS design uses a 100Ω

parallel resistor at the receiver and a 100Ω 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. Renesas 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 7 can be used with either type of output structure. Figure 8, 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 Renesas 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.

Figure 7. Standard LVDS Termination

Figure 8. Optional LVDS Termination