Hardware development notes (VII): basic process of hardware development, making a USB to RS232 module (VI): creating 0603 package and associating principle graphic devices

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Hardware related development

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Preface

   With the schematic diagram , Can design hardware PCB, In the design PCB There is also a coordinated priority action , Mapping encapsulation , The components of the schematic library are designed by us . In order to better describe the packaging design process , This paper describes the chip resistor capacitor 0603 Chip packaging , Create PATCH PADS , Connect the components of the schematic diagram to the pin package .

Schematic packaging analysis

  

• Serial number 1：USB Port packaging , see datasheet establish
• Serial number 2：CON encapsulation , Use dip2.54,2dip
• Serial number 3：ASM1117-3.3V encapsulation , see datasheet establish
• Serial number 4：CON encapsulation , Use dip2.54,3dip
• Serial number 5： Capacitor package , choose 0603 establish
• Serial number 6：CH340G encapsulation , see datashee establish
• Serial number 7： Crystal oscillator package , see datasheet establish
• Serial number 8：MAX232 Component packaging , see datasheet establish
• Serial number 9：CON encapsulation , Use dip2.54,5dip

   above , Actually com There is a universal ,0603 These are also general standard packages .

establish 0603 encapsulation

  0603 Mainly capacitance , Common packaging for basic sensors such as resistors .
   The same resistance has different power ,0805 The power is 1/8W,0603 The power is 1/10W, So the power of the two is different .
   The capacitance is generally different from the withstand voltage ,0805 The maximum operating voltage and the maximum load voltage are 400V and 800V,0603 The maximum operating voltage and the maximum load voltage are 200V and 400V, So the withstand voltage of the two is different .

0603 Package dimension drawing of

  

Other similar package dimension drawings （ Indicative only ）

  
  
  

establish Pad Pad （ Rectangle ,SMT Patch pad ）

  
  
  
  
  
  
   see ：
  

establish 0603 Component packaging

  
  
  
  
  
  
  
  
  
  
   Delete the superfluous C, The reservation is top Of ：
  
   Delete pin serial number ：
  

Schematic Association encapsulation

Step one ： Open the schematic project

  
  

Step two ： Double click the component to add the package

  
  

Last one ：《 Hardware development notes （ 6、 ... and ）: Basic process of hardware development , To make a USB turn RS232 Module （ 5、 ... and ）： establish USB Package library and associate principle element devices 》
Next ： Coming soon …

If the article is original , Reprint please indicate the source of the original
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