PCA8575BQ PHILIPS [NXP Semiconductors], PCA8575BQ Datasheet - Page 26
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PCA8575BQ
Manufacturer Part Number
PCA8575BQ
Description
Remote 16-bit I/O expander for I2C-bus with interrupt
Manufacturer
PHILIPS [NXP Semiconductors]
Datasheet
1.PCA8575BQ.pdf
(30 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PCA8575BQ
Manufacturer:
NXP/恩智浦
Quantity:
20 000
NXP Semiconductors
PCA8575_1
Objective data sheet
16.4 Reflow soldering
Key characteristics in reflow soldering are:
Table 7.
Table 8.
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
Package thickness (mm)
< 1.6
1.6 to 2.5
> 2.5
•
•
•
•
•
2.5
Process issues, such as application of adhesive and flux, clinching of leads, board
transport, the solder wave parameters, and the time during which components are
exposed to the wave
Solder bath specifications, including temperature and impurities
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 7
SnPb eutectic process (from J-STD-020C)
Lead-free process (from J-STD-020C)
and
Figure
8
Rev. 01 — 30 November 2006
28.
Package reflow temperature ( C)
Volume (mm
< 350
235
220
Package reflow temperature ( C)
Volume (mm
< 350
260
260
250
Remote 16-bit I/O expander for I
3
3
)
)
Figure
350 to 2000
260
250
245
28) than a PbSn process, thus
220
220
350
2
C-bus with interrupt
> 2000
260
245
245
PCA8575
© NXP B.V. 2006. All rights reserved.
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