tda8034at NXP Semiconductors, tda8034at Datasheet - Page 22
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tda8034at
Manufacturer Part Number
tda8034at
Description
Smart Card Interface
Manufacturer
NXP Semiconductors
Datasheet
1.TDA8034AT.pdf
(29 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
tda8034at/C1
Manufacturer:
NXP/恩智浦
Quantity:
20 000
NXP Semiconductors
TDA8034T_TDA8034AT_1
Product data sheet
14.4 Reflow soldering
Key characteristics in reflow soldering are:
Table 10.
Table 11.
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
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 10
SnPb eutectic process (from J-STD-020C)
Lead-free process (from J-STD-020C)
and
Figure
11
16.
Rev. 01 — 5 February 2010
Package reflow temperature ( C)
Volume (mm
< 350
235
220
Package reflow temperature ( C)
Volume (mm
< 350
260
260
250
3
3
TDA8034T; TDA8034AT
)
)
Figure
350 to 2000
260
250
245
16) than a SnPb process, thus
220
220
350
Smart card interface
> 2000
260
245
245
© NXP B.V. 2010. All rights reserved.
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