Datasheet

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Package information STM32L052x6 STM32L052x8

124/143 DocID025936 Rev 8

Figure 48. Standard WLCSP36 - 2.61 x 2.88 mm, 0.4 mm pitch wafer level chip scale

recommended footprint

F-0.305

(3)

- - 0.012 -

G-0.440

(3)

- - 0.017 -

aaa - - 0.100 - - 0.004

bbb - - 0.100 - - 0.004

ccc - - 0.100 - - 0.004

ddd - - 0.050 - - 0.002

eee - - 0.050 - - 0.002

1. Values in inches are converted from mm and rounded to the 3rd decimal place.

2. Nominal dimension rounded to the 3rd decimal place results from process capability.

3. Calculated dimensions are rounded to the 3rd decimal place.

Table 85. Standard WLCSP36 recommended PCB design rules

Dimension Recommended values

Pitch 0.4 mm

Dpad

260 µm max. (circular)

220 µm recommended

Dsm 300 µm min. (for 260 µm diameter pad)

PCB pad design Non-solder mask defined via underbump allowed

Table 84. Standard WLCSP36 - 2.61 x 2.88 mm, 0.4 mm pitch wafer level chip scale

mechanical data (continued)

Symbol

millimeters inches

(1)

Min Typ Max Min Typ Max

069

'VP

'SDG

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