Hello

The cutoff required for admission varies every year from college to college depending on various factors such as difficulty level of the exam, number of seats, etc.  Cutoff also varies category wise, region wise.
You can go through the link below and check  the previous year TS ECET Allotment list for reference and to have an idea about the cutoff required for admission:

https://tsecet.nic.in/college_allotment.aspx

Good Luck!