TQFP ( eng. Thin Quad Flat Pack ) - the type of case of the chip . It has the same advantages as QFP , but is less thick (1 millimeter) and has a standard lead size (2 millimeters). The possible number of conclusions from 32 to 176 with the size of one side of the body from 5 to 20 millimeters. Copper terminals are used in increments of 0.4, 0.5, 0.65, 0.8, and 1 millimeter.
TQFP allows you to solve problems such as increasing the density of components on printed circuit boards , reducing the size of the substrate, reducing the thickness of the device.