If you do not have the HOME STATE QUOTA advantage then your JEE MAIN AIR should be less than 650.

Getting within the Top 600 Ranks would be ‘safe’ you n order to get good admissions in the college. You can get good colleges only if your rank is equally likely falling into the mentioned category.

You should get above 99.3 (outer state category) percentile to get CSE at NIT trichy if you belong to general category and 99.5 percentile for home state. I hope it helps