If it is your 2nd or more it is required by law. Additionally, some judges put them on EVERY DWI in their court. Others, order it on a case by case basis.
It depends on your alleged blood alcohol concentration at the time of the event. Contact a local attorney, and bring all documentation you have regarding the incident; you only have 15 days from the arrest date to request a hearing on the suspension of your driver's license. Good luck.