Article ID: 000074485 Content Type: Troubleshooting Last Reviewed: 09/11/2012

Can I directly connect (DC couple) a 1.8V LVDS buffer to a 2.5V LVDS buffer?

Environment

BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

Yes, when working with the LVDS I/O standard, the LVDS signaling properties of the buffer should be your focus, not the power source of the buffer.   As long as the common mode range and the differential voltage swing is compatible between the two devices there will be no problem and you can DC couple the interface.  It is important to power the buffer by the recommended voltage level for that device to ensure the buffer functions as specified.

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Intel® Programmable Devices