| The universal formula for electronic procurement |
| Brand |
| Category |
| Package |
| Packaging form |
| Simple naming rules |
| Batch code |
- Original content, please do not reprint.
Have you ever experienced the embarrassment of buying wrong materials, remembering wrong packaging and the after-sales supplier refusing to return the goods? Have you often made mistakes
due to electronic materials? Today we share some electronic knowledge that needs to be mastered in the purchase of electronic materials, hoping to help you,
The universal formula for electronic procurement
For the novice electronic component buyer, the quickest way is to use this universal formula for purchasing, according to which you can basically start your work.
The first is the brand, and then the model packaging, followed by the batch, which is the year of the product, and the minimum packaging of the components. Can it be invoiced? Payment? Is
the product quality original and genuine?
As for electronic material procurement, to purchase the right electronic components, it is basically based on the above universal formula,So let's go through it one by one. If you can't remember
a video, we'll have a detailed table in the video.
Brand
The first is brand,You should know at least the brand of materials you purchase is European and American, Japanese and Korean, Taiwan or Chinese,For the buyer of electronic materials, it is
impossible to escape 10-20 brands of materials in a BOM sheet,It can be said that most of the mainstream brands of electronic components are indispensable.
The following table is the common electronic components brands, if you need friends can save screenshots.
(tu)
Category
There are many kinds of electronic devices. If you encounter a non-electronic professional to engage in electronic material procurement, although it is impossible to deeply understand the working
principle of each type of electronic device, at least the following types are known. Common types of components are as follows:
1、IC：IC is an integrated circuit. Basically, IC has MCU, single chip microcomputer, FPGA, memory, various simulators, amplifiers, analog-to-digital converters and power ICs. Most of the factory ICs
are used in these types.
2、Diode：There are many kinds of diodes, such as rectifier diode, voltage regulator diode, Schottky and so on. These types only need to be roughly understood. For purchasers, the most important
thing is to check the model and packaging clearly.
There are many kinds of diodes, which can be divided into rectifier diode, voltage regulator diode, Schottky diode, switching diode, fast recovery diode, light-emitting diode (LED), photoelectric
diode, varicap diode, TVS diode and other main types according to function, material and structure.
3、Transistor：TheTransistor is mainly divided into two basic types, NPN type and PNP type, and then there are field effect transistors and bipolar transistors,The next category is resistance and
capacitance. Here, we also provide a universal formula for friends to purchase. According to this formula, you will not buy the wrong material.
4、Resistance、capacitance：
Resistance：Resistance is brand resistance value packaging accuracy here, one parameter can not be missing, less may purchase the wrong material.
Capacitance：Capacitance is also a parameter that cannot be omitted.
Package
For a buyer who is responsible for purchasing hundreds of categories at a time, it is very difficult to remember the packaging of each electronic component.
Here we provide a package table of an electronic component, you can take a screenshot and save it, in the usual purchasing work can check your own package.
The main points to pay attention to here are the conventional foot, the secret foot, the conventional body, the ultra-thin body, the medium body, the wide body, and the narrow body between
encapsulation and encapsulation. The literal forms of these packages are similar, but they cannot be used interchangeably, which is very important.
Packaging form
The other is the packaging form,Common electronic component packaging has disc tape loading, tray loading, tube loading and so on. The main thing is to see what your component is
encapsulated, different packaging models are different.
Simple naming rules
Many purchasing components will be purchased incorrectly, because of the lack of understanding of the naming rules. The naming rules of different brands are different. Here, in order to
facilitate and save time, we provide a universal naming rules table, which is used for most electronic components.
The chip model is usually composed of three modules, the brand series and one parameter, as well as temperature, speed, and packaging information. Here, the lead-free packaging form is
collectively referred to as packaging information, and the three modules form a formula that can parse most chip names.
Batch code
The component batch code is very simple,Basically, the first two are its years, and the last two are its production cycle.For example, if the year is 2129, then it is the 29th week of 2021.twenty-nine
divided by four (four weeks in a month) is the material for July.
