Toon were hot on the heels of the Lille full-back throughout the summer, but were unable to strike a deal.
However, the Magpies have pressed ahead with a fresh move ahead of the January transfer window which opens in two days.
Debuchy will cost around £5.5million and must now agree personal terms with Alan Pardew’s men.
The 27-year-old, who has 12 caps for France, is good mates with Newcastle ace Yohan Cabaye.
His signature is likely to spell the end for Danny Simpson on Tyneside, whose contract is up at the end of the season.
The Sun
