欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: CPW049-0730-07CB95L
元件分類: 插座
英文描述: BGA49, IC SOCKET
封裝: ROHS COMPLIANT
文件頁數: 6/8頁
文件大?。?/td> 1138K
代理商: CPW049-0730-07CB95L
Socket Mounting Recommendations and Reflow Profile
E-tec Interconnect Ltd, Industrial Zone C, CH-1072 Forel (Lavaux), Switzerland
Phone +41-21-781 08 10 www.e-tec.com info@e-tec.com
E-tec Socket Mounting Recommendations
PRELIMINARY
4
Verifying the Assembly
After the socket has been reflowed to the PCB, open and short testing should be partaken to
ensure proper assembly. The assembly house typically performs x-ray inspection to verify non-
shorting of pins. However, as this is only a visual inspection, we recommend using a continuity
tester or ohmmeter and simply sweeping random rows and columns of pins to ensure no shorting
of pins. No damage to the springs will occur if very slight pressure from the meter’s tips is
applied (just touch the probes to the springs). For fine pitch sockets, a microscope would be
helpful in placing the meter’s tips appropriately.
After verifying the absence of shorts, open testing should be performed. The most direct, yet
tedious, method is to use the continuity tester to directly probe each pin to a breakout or test
point on the board. Again no damage will occur if the probes are touched to the springs. If heavy
pressure is required to push the socket body towards the PCB to achieve continuity, this means a
poor solder joint. If no such test points exist, then the BGA’s via field on the backside of the
PCB should be kept solder-mask free to allow for such probing. If the via field is kept open, a
simpler open testing method can be performed. Simply use a wet sponge (or some other
conductive material) and hold it onto the via field. This shorts all the pins together on the PCB.
Insert one probe of the continuity tester into the sponge. Now sweep the pins of the socket with
the other probe and check for continuity.
If the above procedures show any shorts or opens, then it is advisable to have the assembly house
re-evaluate the assembly method used. An incorrect stencil can lead to too much or too little
solder paste, easily leading short or open conditions and a solder paste with Ag contents
(>=0.5%) may also result in solder joint failures. These are the primary reasons for socket
mounting failures.
Important Notes:
a) Screw/Twist Lock Socket
When tightening the lid of a Screw or Twist Lock socket, it is imperative to not over-tighten the
retention screws, otherwise irreparable damage may occur. Such damage is not covered by
warranty and will be solely the end user’s responsibility. The maximum allowed torque on these
retention screws is 7cN-m (10oz-in) for sockets up to 800 pins and for sockets as of 800 pins the
torque value needs to be increased but should not exceed a maximum of 10cN-m (14oz-in). E-tec
sells the torque screwdriver TOL-7CN-TORQUE which is preset to 7cN-m, but which can be
adjusted to higher torque values for the high pin count sockets.
相關PDF資料
PDF描述
CIS131-49GG PGA131, IC SOCKET
CIS179-01TT PGA179, IC SOCKET
CIS179-04TT PGA179, IC SOCKET
CIS180-49TG PGA180, IC SOCKET
CIS080-49TG PGA280, IC SOCKET
相關代理商/技術參數
參數描述
CPW05100R0FB14 功能描述:RES 100 OHM 5W 1% AXIAL 制造商:vishay dale 系列:CPW 包裝:散裝 零件狀態:有效 電阻(歐姆):100 容差:±1% 功率(W):5W 成分:繞線 特性:耐燃,脈沖耐受,安全 溫度系數:±30ppm/°C 工作溫度:-65°C ~ 275°C 封裝/外殼:軸向 供應商器件封裝:軸向 大小/尺寸:0.875" 長 x 0.375" 寬(22.22mm x 9.52mm) 高度:- 端子數:2 標準包裝:1
CPW05100R0JB14 功能描述:RES 100 OHM 5W 5% AXIAL 制造商:vishay dale 系列:CPW 包裝:散裝 零件狀態:有效 電阻(歐姆):100 容差:±5% 功率(W):5W 成分:繞線 特性:耐燃,脈沖耐受,安全 溫度系數:±30ppm/°C 工作溫度:-65°C ~ 275°C 封裝/外殼:軸向 供應商器件封裝:軸向 大小/尺寸:0.875" 長 x 0.375" 寬(22.22mm x 9.52mm) 高度:- 端子數:2 標準包裝:1
CPW05100R0JB143 功能描述:RES 100 OHM 5W 5% AXIAL 制造商:vishay dale 系列:CPW 包裝:散裝 零件狀態:有效 電阻(歐姆):100 容差:±5% 功率(W):5W 成分:繞線 特性:耐燃,脈沖耐受,安全 溫度系數:±30ppm/°C 工作溫度:-65°C ~ 275°C 封裝/外殼:軸向 供應商器件封裝:軸向 大小/尺寸:0.875" 長 x 0.375" 寬(22.22mm x 9.52mm) 高度:- 端子數:2 標準包裝:1
CPW05100R0JE14 功能描述:RES 100 OHM 5W 5% AXIAL 制造商:vishay dale 系列:CPW 包裝:散裝 零件狀態:有效 電阻(歐姆):100 容差:±5% 功率(W):5W 成分:繞線 特性:耐燃,脈沖耐受,安全 溫度系數:±30ppm/°C 工作溫度:-65°C ~ 275°C 封裝/外殼:軸向 供應商器件封裝:軸向 大小/尺寸:0.875" 長 x 0.375" 寬(22.22mm x 9.52mm) 高度:- 端子數:2 標準包裝:1
CPW05100R0KE143 功能描述:RES 100 OHM 5W 10% AXIAL 制造商:vishay dale 系列:CPW 包裝:散裝 零件狀態:有效 電阻(歐姆):100 容差:±10% 功率(W):5W 成分:繞線 特性:耐燃,脈沖耐受,安全 溫度系數:±30ppm/°C 工作溫度:-65°C ~ 275°C 封裝/外殼:軸向 供應商器件封裝:軸向 大小/尺寸:0.875" 長 x 0.375" 寬(22.22mm x 9.52mm) 高度:- 端子數:2 標準包裝:1
主站蜘蛛池模板: 全椒县| 天津市| 大邑县| 饶阳县| 吐鲁番市| 洪湖市| 泰安市| 正安县| 浙江省| 库尔勒市| 绥宁县| 五大连池市| 腾冲县| 临清市| 沙田区| 兴文县| 昌都县| 邓州市| 昌图县| 县级市| 金塔县| 凤城市| 东乡族自治县| 宁津县| 剑阁县| 綦江县| 中方县| 肃北| 宁武县| 禹州市| 淮滨县| 无棣县| 左云县| 临海市| 无锡市| 江都市| 固安县| 瓮安县| 柘城县| 曲周县| 北海市|