STM32F051R4Y7 查看數據表（PDF） - STMicroelectronics

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STM32F051R4Y7

ARM®-based 32-bit MCU, 16 to 64 KB Flash, 11 timers, ADC, DAC and communication interfaces, 2.0-3.6 V

STMicroelectronics 

Package information

STM32F051x4 STM32F051x6 STM32F051x8

Symbol

Table 70. WLCSP36 package mechanical data (continued)

millimeters

inches(1)

Min

Typ

Max

Min

Typ

F

-

0.3025

-

-

0.0119

G

-

0.3515

-

-

0.0138

aaa

-

-

0.100

-

-

bbb

-

-

0.100

-

-

ccc

-

-

0.100

-

-

ddd

-

-

0.050

-

-

eee

-

-

0.050

-

-

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

2. Back side coating.

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

Max

-

-

0.0039

0.0039

0.0039

0.0020

0.0020

Figure 47. Recommended pad footprint for WLCSP36 package

'SDG

'VP

069

Table 71. 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

104/122

DocID022265 Rev 7

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