首页 技术 正文
技术 2022年11月23日
0 收藏 545 点赞 5,073 浏览 1253 个字

来源:https://www.raviyp.com/embedded/150-identifying-pin-no-1-on-an-ic

Identifying pin no 1 on an IC

Ravi Pujar
31 October 2014

I did write to ST microelectronics support engineers, but for no avail. I did not receive any reply from them. We had ordered the part from Digikey. The datasheet showed that the pin no 1 for the SO-8 package will be identified by half circle notch but, the part i had ordered didn’t have any kind of marking(notch,dot,line,bevel) except the name of the IC. Strange..!. After a lot of googling i found a discussion on a same kind of IC which didnt have pin no 1 marking on it. There they had mentioned that the pin no 1 for such parts is identified as follows,

 

.reponsive-top { width: 300px; height: 250px }
@media (min-width: 500px) { .reponsive-top { width: 336px; height: 280px } }
@media (min-width: 1100px) { .reponsive-top { width: 800px; height: 250px } }

“If the IC/Chip has got no markings then hold it horizontally so that the writing is from left to right and now the pin no 1 is the one on the bottom left.”

Its 100% correct..! The IC worked after soldering this way..!

Here are a few images which might help you in identifying the pin no 1 in a chip/integrated circuit.

The image shown below is applicable for two sided chips like DIP,SIP,SO,SOIC

The images shown below are for SIP packages..

Normally you should not have any problem finding the pin no 1 on any IC as it’s datasheet should have the information about how the pin no 1 is marked. So, first refer your datasheet. 🙂

相关推荐
python开发_常用的python模块及安装方法
adodb:我们领导推荐的数据库连接组件bsddb3:BerkeleyDB的连接组件Cheetah-1.0:我比较喜欢这个版本的cheeta…
日期:2022-11-24 点赞:878 阅读:8,723
Educational Codeforces Round 11 C. Hard Process 二分
C. Hard Process题目连接:http://www.codeforces.com/contest/660/problem/CDes…
日期:2022-11-24 点赞:807 阅读:5,328
下载Ubuntn 17.04 内核源代码
zengkefu@server1:/usr/src$ uname -aLinux server1 4.10.0-19-generic #21…
日期:2022-11-24 点赞:569 阅读:6,155
可用Active Desktop Calendar V7.86 注册码序列号
可用Active Desktop Calendar V7.86 注册码序列号Name: www.greendown.cn Code: &nb…
日期:2022-11-24 点赞:733 阅读:5,974
Android调用系统相机、自定义相机、处理大图片
Android调用系统相机和自定义相机实例本博文主要是介绍了android上使用相机进行拍照并显示的两种方式,并且由于涉及到要把拍到的照片显…
日期:2022-11-24 点赞:512 阅读:7,619
Struts的使用
一、Struts2的获取  Struts的官方网站为:http://struts.apache.org/  下载完Struts2的jar包,…
日期:2022-11-24 点赞:671 阅读:4,637