Datasheet

ManualsBrandsST ManualsEmbedded Processors & ControllersMicrocontroller 32bit 128KB LQFP

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DocID027100 Rev 4 135/149

STM32L072xx Package information

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Figure 54. WLCSP49 - 49-pin, 3.294 x 3.258 mm, 0.4 mm pitch wafer level chip scale

recommended footprint

Table 89. WLCSP49 - 49-pin, 3.294 x 3.258 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 - 0.175 - - 0.0069 -

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 3.259 3.294 3.329 0.1283 0.1297 0.1311

E 3.223 3.258 3.293 0.1269 0.1283 0.1296

e - 0.400 - - 0.0157 -

e1 - 2.400 - - 0.0945 -

e2 - 2.400 - - 0.0945 -

F - 0.447 - - 0.0176 -

G - 0.429 - - 0.0169 -

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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