 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
EM357-RTR 数据表(PDF) 223 Page - Silicon Laboratories |
|
|
|||||||||||||||||||||||||||||
EM357-RTR 数据表(HTML) 223 Page - Silicon Laboratories |
|
|
223 / 241 page  Rev 1.3 223 20. Package The EM35x package is a plastic 48-pin QFN that is 7 mm x 7 mm. Figure 20.1 illustrates the package drawing. Figure 20.1. Package Drawing 20.1. QFN48 Footprint Recommendations Figure 20.2 demonstrates the IPC-7351 recommended PCB Footprint for the EM35x (QFN50P700X700X90-49N). A ground pad in the bottom center of the package forms a 49th pin. A 3 x 3 array of non-thermal vias should connect the EM35x decal center shown in Figure 20.2 to the PCB ground plane through the ground pad. To properly solder the EM35x to the footprint, the Paste Mask layer should have a 3 x 3 array of circular openings at 1.015 mm diameter spaced approximately 1.625 mm (center to center) apart, as shown in Figure 20.3. This will cause an evenly distributed solder flow and coplanar attachment to the PCB. The solder mask layer (illustrated in Figure 20.4) should be the same as the copper layer for the EM35x footprint. For more information on the package footprint, please refer to the appropriate EM35x Reference Design. |
|
链接网址 |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 数据表链接 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
