ISP1183BS STEricsson, ISP1183BS Datasheet - Page 58

• Manufacturer Part Number: ISP1183BS
• Manufacturer: STEricsson

Specifications of ISP1183BS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ISP1183_3
Product data sheet
20.4 Reflow soldering
Key characteristics in reflow soldering are:
Table 59.
Table 60.
Moisture sensitivity precautions, as indicated on the packing, must be respected at all
times.
Studies have shown that small packages reach higher temperatures during reflow
soldering, see
Package thickness (mm)
< 2.5
≥ 2.5
Package thickness (mm)
< 1.6
1.6 to 2.5
> 2.5
•
•
•
Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to
higher minimum peak temperatures (see
reducing the process window
Solder paste printing issues including smearing, release, and adjusting the process
window for a mix of large and small components on one board
Reflow temperature profile; this profile includes preheat, reflow (in which the board is
heated to the peak temperature) and cooling down. It is imperative that the peak
temperature is high enough for the solder to make reliable solder joints (a solder paste
characteristic). In addition, the peak temperature must be low enough that the
packages and/or boards are not damaged. The peak temperature of the package
depends on package thickness and volume and is classified in accordance with
Table 59
SnPb eutectic process (from J-STD-020C)
Lead-free process (from J-STD-020C)
and
Figure
60
29.
Rev. 03 — 20 January 2009
Package reflow temperature (°C)
Volume (mm
< 350
235
220
Package reflow temperature (°C)
Volume (mm
< 350
260
260
250
Low-power USB Peripheral Controller with DMA
3
3
)
)
Figure
350 to 2000
260
250
245
29) than a SnPb process, thus
≥ 350
220
220
© ST-NXP Wireless 2009. All rights reserved.
> 2000
260
245
245
ISP1183
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