This is our QFN package roadmap. We offer five different devices in QFN packages. The MAX3222E and the MAX3223E are offered in a 24-pin QFN packaging. The MAX3243E, the MAX3238E, and the MAX3237E are offered in 32-pin QFN packaging. Please note that there are some no connect pins in the QFN packages. These can be left floating or can be connected to the ground in your applications.