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STM32F405xx, STM32F407xx Package information

Figure 76. WLCSP90 - 4.223 x 3.969 mm, 0.400 mm pitch wafer level chip scale

recommended footprint

Table 90. WLCSP90 - 4.223 x 3.969 mm, 0.400 mm pitch wafer level chip scale

package mechanical data

Symbol

millimeters inches

(1)

1. Values in inches are converted from mm and rounded to 4 decimal digits.

Min Typ Max Min Typ Max

A 0.540 0.570 0.600 0.0213 0.0224 0.0236

A1 - 0.190 - - 0.0075 -

A2 - 0.380 - - 0.0150 -

(2)

2. Back side coating.

- 0.025 - - 0.0010 -

(3)

3. Dimension is measured at the maximum bump diameter parallel to primary datum Z.

0.240 0.270 0.300 0.0094 0.0106 0.0118

D 4.188 4.223 4.258 0.1649 0.1663 0.1676

E 3.934 3.969 4.004 0.1549 0.1563 0.1576

e - 0.400 - - 0.0157 -

e1 - 3.600 - - 0.1417 -

e2 - 3.200 - - 0.1260 -

F - 0.3115 - - 0.0123 -

G - 0.3845 - - 0.0151 -

aaa - 0.100 - - 0.0039 -

bbb - 0.100 - - 0.0039 -

ccc - 0.100 - - 0.0039 -

ddd - 0.050 - - 0.0020 -

eee - 0.050 - - 0.0020 -

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