C8051F321-GMR Datasheet, PDF (37/250 Pages) Silicon Laboratories – Full Speed USB, 16 k ISP FLASH MCU Family

C8051F320/1
Figure 4.5. QFN-28 Package Drawing
Table 4.4. QFN-28 Package Dimensions
Dimension Min
Typ
Max
Dimension Min
Typ
Max
A
0.80
0.90
1.00
A1
0.00
0.02
0.05
L
0.35
0.55
0.65
L1
0.00
—
0.15
A3
0.25 REF
aaa
0.15
b
0.18
0.23
0.30
bbb
0.10
D
5.00 BSC.
ddd
0.05
D2
2.90
3.15
3.35
eee
0.08
e
0.50 BSC.
Z
0.44
E
5.00 BSC.
Y
0.18
E2
2.90
3.15
3.35
Notes:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing per ANSI Y14.5M-1994.
3. This drawing conforms to the JEDEC Solid State Outline MO-220, variation VHHD except for
custom features D2, E2, Z, Y, and L which are toleranced per supplier designation.
4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body
Components.
Rev. 1.4
37