Hello Delia, no but there are many banks/lenders that have their own guidelines and may require tougher qualification higher scores.
Some lenders that are brokers have many banks to choose from to fit your financial scenario. You may consider FHA 3.5% down from a minimum 580 fico score and 3% down conventional from a minimum 620 fico score. If you have low fico scores between 500-579 you may consider 10% down FHA.
Your credit scores can be raised within 3-4 days in most cases to qualify for programs, rates and terms as necessary. If you provide the required documentation you can get a pre-approval letter usually within 24 hours. Check out the web reference link below...