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參數(shù)資料
| 型號： | FBGA |
| 英文描述： | FBGA - FBGA User＇s Guide. Version 4.2 |
| 中文描述： | FBGA封裝- FBGA封裝用戶指南。版本4.2 |
| 文件頁數(shù)： | 87/97頁 |
| 文件大?。?/td> | 2624K |
| 代理商： | FBGA |
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Publication#
22142
Issue Date:
April 15, 2002
Rev:
A
Amendment/
+2
Daisy Chain Samples
Application Note
Daisy Chain samples are non-functional parts with a
pattern of inter-connected balls. These samples are
typically assembled onto a printed circuit board (PCB)
with matching patterns. Once assembled on the match-
ing PCB, all balls are connected creating a continuous
network. Refer to Figure 1.
Notes:
1. “_____” Solid traces are Daisy Chain patterns on the FBGA package.
2. “- - - - -” Dash traces are Daisy Chain patterns on the PCB.
3. ‘a(chǎn)’, ‘b’ are the input and output of the network for the device.
4. ‘c’, ‘d’ are the input and output of a separate network for the support balls.
Figure 1.
FBGA 32 Mb and 64 Mb Silicon Daisy Chain with Matching PCB Schematic (Top View)
Daisy Chain samples are primarily requested by OEMs
to perform assembly evaluations. Prior to production,
an OEM will generally solder daisy chain samples on to
a daisy chain PCB and perform Open/Short testing to
check for misalignments. This test will help an OEM
characterize its assembly process and equipment prior
to full production.
Daisy Chains are also used in Second Level Solder-
Joint Board Reliability studies. The daisy chain sam-
ples are assembled onto the matching PCB and sub-
jected to temperature cycling in an oven. Board Level
Reliability tests are tools to help predict and measure
the expected life of packages. For more in depth infor-
mation on Second Level Solder-Joint Board Reliability,
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| FBGC-2.75G | 制造商:MERRIMAC 制造商全稱:MERRIMAC 功能描述:FILTER |
| FBGC-3-1.4G | 制造商:MERRIMAC 制造商全稱:MERRIMAC 功能描述:FILTER |
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