- 您現在的位置：買賣IC網 > PDF目錄360998 > ISP1123BD (NXP SEMICONDUCTORS) CAP .068UF 100V PPS FILM ECH-S PDF資料下載
參數資料
| 型號： | ISP1123BD |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線控制器 |
| 英文描述： | CAP .068UF 100V PPS FILM ECH-S |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP32 |
| 封裝： | 7 X 7 X 1.40 MM, PLASTIC, LQFP-32 |
| 文件頁數： | 43/49頁 |
| 文件大小： | 1155K |
| 代理商： | ISP1123BD |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁當前第43頁第44頁第45頁第46頁第47頁第48頁第49頁
Philips Semiconductors
ISP1123
USB compound hub
Preliminary specification
Rev. 01 — 5 October 1999
43 of 49
9397 750 06325
Philips Electronics N.V. 1999. All rights reserved.
19. Soldering
19.1 Introduction
This text gives a very brief insight to a complex technology. A more in-depth account
of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit
Packages(document order number 9398 652 90011).
There is no soldering method that is ideal for all IC packages. Wave soldering is often
preferred when through-hole and surface mount components are mixed on one
printed-circuit board. However, wave soldering is not always suitable for surface
mount ICs, or for printed-circuit boards with high population densities. In these
situations reflow soldering is often used.
19.2 Surface mount packages
19.2.1
Reflow soldering
Reflow soldering requires solder paste (a suspension of fine solder particles, flux and
binding agent) to be applied to the printed-circuit board by screen printing, stencilling
or pressure-syringe dispensing before package placement.
Several methods exist for reflowing; for example, infrared/convection heating in a
conveyor type oven. Throughput times (preheating, soldering and cooling) vary
between 100 and 200 seconds depending on heating method.
Typical reflow peak temperatures range from 215 to 250
°
C. The top-surface
temperature of the packages should preferable be kept below 230
°
C.
19.2.2
Wave soldering
Conventional single wave soldering is not recommended for surface mount devices
(SMDs) or printed-circuit boards with a high component density, as solder bridging
and non-wetting can present major problems.
To overcome these problems the double-wave soldering method was specifically
developed.
If wave soldering is used the following conditions must be observed for optimal
results:
Use a double-wave soldering method comprising a turbulent wave with high
upward pressure followed by a smooth laminar wave.
For packages with leads on two sides and a pitch (e):
–
larger than or equal to 1.27 mm, the footprint longitudinal axis is
preferred
to be
parallel to the transport direction of the printed-circuit board;
–
smaller than 1.27 mm, the footprint longitudinal axis
must
be parallel to the
transport direction of the printed-circuit board.
The footprint must incorporate solder thieves at the downstream end.
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.
相關PDF資料 |
PDF描述 |
|---|---|
| ISP1123 | Universal Serial Bus compound hub |
| ISP1123D | Universal Serial Bus compound hub |
| ISP1123NB | Universal Serial Bus compound hub |
| ISP1130 | Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130DL | Universal Serial Bus compound hub with integrated keyboard controller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ISP1123D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
| ISP1123NB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub |
| ISP1130 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130DL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130N | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
發布緊急采購，3分鐘左右您將得到回復。