Datasheet

STM32F050xx Package characteristics
Doc ID 023683 Rev 1 89/97
Figure 36. UFQFPN28 - 4 x 4 mm, 28-lead ultra thin fine pitch quad flat no-lead package outline
1. Drawing is not to scale.
2. Dimensions are in millimeters.
3. All leads/pads should also be soldered to the PCB to improve the lead/pad solder joint life.
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Table 63. UFQFPN28 – 4 x 4 mm, 28-lead ultra thin fine pitch quad flat no-lead package
mechanical data
Symbol
millimeters inches
(1)
Min Typ Max Min Typ Max
A 0.5 0.55 0.6 0.0197 0.0217 0.0236
A1 -0.05 0 0.05 -0.002 0 0.002
D 3.9 4 4.1 0.1535 0.1575 0.1614
D1 2.9 3 3.1 0.1142 0.1181 0.122
E 3.9 4 4.1 0.1535 0.1575 0.1614
E1 2.9 3 3.1 0.1142 0.1181 0.122
L 0.3 0.4 0.5 0.0118 0.0157 0.0197
L1 0.25 0.35 0.45 0.0098 0.0138 0.0177
T 0.152 0.006
b 0.2 0.25 0.3 0.0079 0.0098 0.0118
e 0.5 0.0197
1. Values in inches are converted from mm and rounded to 4 decimal digits.