Datasheet

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STM32F412xE/G Package information

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Figure 61. WLCSP64 - 64-pin, 3.658 x 3.686 mm, 0.4 mm pitch wafer level chip scale

recommended footprint

Table 98. WLCSP64 - 64-pin, 3.658 x 3.686 mm, 0.4 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 0.525 0.555 0.585 0.0207 0.0219 0.0230

A1 - 0.170 - - 0.0067 -

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.

0.220 0.250 0.280 0.0087 0.0098 0.0110

D 3.588 3.623 3.658 0.1413 0.1426 0.1440

E 3.616 3.651 3.686 0.1424 0.1437 0.1451

e - 0.400 - - 0.0157 -

e1 - 2.800 - - 0.1102 -

e2 - 2.800 - - 0.1102 -

F - 0.4115 - - 0.0162 -

G - 0.4255 - - 0.0168 -

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

Table 99. WLCSP64 recommended PCB design rules (0.4 mm pitch)

Dimension Recommended values

Pitch 0.4 mm

Dpad 0.225 mm

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