Hello Asdil,

               With overall rank of 7645 in BCM category, you can get ECE in GCT(Coimbatore), but the cutoff for ECE in CIT was 5519- 7243 in BCM category, so you have less chances of getting ECE in CIT. Also, according to previous year's cutoffs, you can get Chemical (ss) engineering, Civil(ss) engineering, and with overall rakn of 7645 in BCM category, you can get CSE(ss), EEE,IT(ss). You can predict which colleges you can get through TNEA with your rank from this link:

https://engineering.careers360.com/tnea-college-predictor

For last year's cutoffs for TNEA seat alloment, go to this link:

https://images.careers360.mobi/sites/default/files/TNEA-2018-ROUND-1-Opening-Closing-Ranks.pdf

Hope it helps!

Best Wishes.