參數(shù)資料
型號(hào)： SAA7893HL
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： Super audio media player
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP128
封裝： 14 X 20 MM, 1.40 MM HEIGTH, PLASTIC, SOT-425-1, LQFP-128
文件頁(yè)數(shù)： 63/66頁(yè)
文件大?。?/td> 1036K
代理商： SAA7893HL
Philips Semiconductors
SAA7893HL
Super audio media player
Product data
Rev. 02 — 26 February 2003
63 of 66
9397 750 10925
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
For packages with leads on four sides, the footprint must be placed at a 45
°
angle
to the transport direction of the printed-circuit board. The footprint must
incorporate solder thieves downstream and at the side corners.
During placement and before soldering, the package must be fixed with a droplet of
adhesive. The adhesive can be applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the adhesive is cured.
Typical dwell time is 4 seconds at 250
°
C. A mildly-activated flux will eliminate the
need for removal of corrosive residues in most applications.
18.4 Manual soldering
Fix the component by first soldering two diagonally-opposite end leads. Use a low
voltage (24 V or less) soldering iron applied to the flat part of the lead. Contact time
must be limited to 10 seconds at up to 300
°
C.
When using a dedicated tool, all other leads can be soldered in one operation within
2 to 5 seconds between 270 and 320
°
C.
18.5 Package related soldering information
[1]
For more detailed information on the BGA packages refer to the (LF)BGA Application Note
(AN01026); order a copy from your Philips Semiconductors sales office.
All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the
maximum temperature (with respect to time) and body size of the package, there is a risk that internal
or external package cracks may occur due to vaporization of the moisture in them (the so called
popcorn effect). For details, refer to the Drypack information in the Data Handbook IC26; Integrated
Circuit Packages; Section: Packing Methods
These packages are not suitable for wave soldering. On versions with the heatsink on the bottom
side, the solder cannot penetrate between the printed-circuit board and the heatsink. On versions with
the heatsink on the top side, the solder might be deposited on the heatsink surface.
If wave soldering is considered, then the package must be placed at a 45
°
angle to the solder wave
direction. The package footprint must incorporate solder thieves downstream and at the side corners.
Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it
is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.
Wave soldering is suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than
0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm.
[2]
[3]
[4]
[5]
[6]
Table 41:
Suitability of surface mount IC packages for wave and reflow soldering
methods
Soldering method
Wave
BGA, LBGA, LFBGA, SQFP, TFBGA, VFBGA
DHVQFN, HBCC, HBGA, HLQFP, HSQFP,
HSOP, HTQFP, HTSSOP, HVQFN, HVSON,
SMS
PLCC
[4]
, SO, SOJ
LQFP, QFP, TQFP
SSOP, TSSOP, VSO, VSSOP
Package
[1]
Reflow
[2]
suitable
suitable
not suitable
not suitable
[3]
suitable
not recommended
[4][5]
not recommended
[6]
suitable
suitable
suitable
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