The mechanical specifications for the package shows the dimensions in millimeters.

WLCSP 2.075x2.075 mm package

Dimensions in millimeters for the WLCSP 2.075x2.075 mm package.

Figure 1. WLCSP 2.075x2.075 mm package
WLCSP 2.075x2.075 mm package
Table 1. WLCSP dimensions in millimeters
A A1 A2 b D E D2 E2 d e K L
Min. 0.406 0.14 0.266 0.195
Nom. 0.464 0.294 2.075 2.075 1.6 1.6 0.4 0.4
Max. 0.522 0.2 0.322 0.255

QFN 4.0x4.0 mm package

Dimensions in millimeters for the QFN 4.0x4.0 mm package.

Figure 2. QFN 4.0x4.0 mm package
QFN 4.0x4.0 mm package
Table 2. QFN dimensions in millimeters
A A1 A2 b D E D2 E2 e K L
Min. 0.80 0.00 0.20 2.60 2.60 0.35
Nom. 0.85 0.035 0.65 0.25 4.0 4.0 2.70 2.70 0.50 0.25 0.40
Max. 0.90 0.05 0.30 2.80 2.80 0.45