EFM8UB1 Datasheet, PDF (44/59 Pages) Silicon Laboratories – The EFM8UB1 highlighted features are listed below

7. QFN28 Package Specifications
7.1 QFN28 Package Dimensions
EFM8UB1 Data Sheet
QFN28 Package Specifications
Figure 7.1. QFN28 Package Drawing
Table 7.1. QFN28 Package Dimensions
Dimension
Min
A
0.70
A1
0.00
A3
b
0.20
D
4.90
D2
3.15
e
E
4.90
E2
3.15
L
0.45
aaa
bbb
ddd
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Typ
0.75
—
0.20 REF
0.25
5.00
3.25
0.50 BSC
5.00
3.25
0.55
0.15
0.10
0.05
Max
0.80
0.05
0.30
5.10
3.35
5.10
3.35
0.65
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