參數(shù)資料
型號: LMX9830
廠商: National Semiconductor Corporation
英文描述: BluetoothTM Serial Port Module
中文描述: 藍(lán)牙串口模塊
文件頁數(shù): 43/46頁
文件大小: 664K
代理商: LMX9830
43
www.national.com
L
15.0 Soldering
The LMX9830 bumps are designed to melt as part of the
Surface Mount Assembly (SMA) process. In order to
ensure reflow of all solder bumps and maximum solder
joint reliability while minimizing damage to the package,
recommended reflow profiles should be used.
Table 40, Table 41 and Figure 27 on page 44 provide the
soldering details required to properly solder the LMX9830 to
standard PCBs. The illustration serves only as a guide and
National is not liable if a selected profile does not work.
See IPC/JEDEC J-STD-020C, July 2004 for more informa-
tion.
Table 40. Soldering Details
Parameter
Value
PCB Land Pad Diameter
13 mil
PCB Solder Mask Opening
19 mil
PCB Finish (HASL details)
Defined by customer or manufacturing facility
Stencil Aperture
17 mil
Stencil Thickness
5 mil
Solder Paste Used
Defined by customer or manufacturing facility
Flux Cleaning Process
Defined by customer or manufacturing facility
Reflow Profiles
See Figure 27 on page 44
Table 41. Classification Reflow Profiles
1,2
Profile Feature
NOPB Assembly
Average Ramp-Up Rate (Ts
MAX
to Tp)
3°C/second maximum
Preheat
:
Temperature Min (Ts
MIN
)
Temperature Max (Ts
MAX
)
Time (ts
MIN
to ts
MAX
)
150°C
200°C
60–180 seconds
Time maintained above:
Temperature (T
L
)
Time (t
L
)
217°C
60–150 seconds
Peak/Classification Temperature (Tp)
260 + 0°C
Time within 5°C of actual Peak Temperature (tp)
20–40 seconds
Ramp-Down Rate
6°C/second maximum
Time 25 °C to Peak Temperature
8 minutes maximum
Reflow Profiles
See Figure 27
1.
2.
See IPC/JEDEC J-STD-020C, July 2004.
All temperatures refer to the top side of the package, measured on the package body surface.
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