As always with timbo nothing is as simple as it seems if you listen to the instrumental version you'll notice he uses like a female chorus synth as well as those punching synth chords but i mean that's as much as i can help you with that one as far as i know he probably made that synth from scratch...
Timbo doesnt always create everything from scratch.
Timbaland used 1 of the appregiator-presets from the Roland SH-201 for that synth you hear in "The Way I Are"
The sound your lookin for might come from the SH-201 as well