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07/15/10 19:46
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 		 #177310 - re: ease of soldering
Responding to: ???'s previous message
Andy Peters said:
Jecksons Ben said:
Oliver Sedlacek said:
What makes you think such a thing exists? Mouser stock the C8051F326 for £2.28. Silabs might do a less capable chip for less money.


Thank's Oliver

The package of chip not easy to solder.


Nonsense.

a-


I emphatically disagree. The 'F326 comes in a QFN-28 package, which is a real b@$tard to solder. In one of my products, I used a SiLabs CP2201 USB-to-UART, which has the same footprint. The yield on these things was ~20%!
For a time I thought this was my own fault, until I visited a respectable board-assembly house and was told they yielded around 25% on QFN packages.

So, yes, I would say they *are* "not easy to solder".


Rob.

List of 44 messages in thread
TopicAuthorDate
USB to IIC cable            01/01/70 00:00      
   http://i2cchip.com/ ?            01/01/70 00:00      
   FTDI?            01/01/70 00:00      
   Proper test tools            01/01/70 00:00      
   clarification            01/01/70 00:00      
      no, I have no experience with what I wrote above            01/01/70 00:00      
      TotoalPhase - Aardvark            01/01/70 00:00      
         Aardvark            01/01/70 00:00      
            That should be harmless            01/01/70 00:00      
               Unless you're an ant or termite            01/01/70 00:00      
            Aardvark Today            01/01/70 00:00      
         could you explain a bit further            01/01/70 00:00      
            Re: could you explain a bit further            01/01/70 00:00      
         Aardvark....            01/01/70 00:00      
      I have used MCC            01/01/70 00:00      
         Now I used it            01/01/70 00:00      
   without IC            01/01/70 00:00      
      "easy" ?            01/01/70 00:00      
         No need IC            01/01/70 00:00      
         like this            01/01/70 00:00      
            can (peobably) be done, but            01/01/70 00:00      
            Not a great idea!            01/01/70 00:00      
               "Microcontrollers with USB and I2C are now common"            01/01/70 00:00      
                  elaborating            01/01/70 00:00      
            Bit Bang on Serial Port            01/01/70 00:00      
               my opinion expressed by editing the above            01/01/70 00:00      
               remote area..            01/01/70 00:00      
                  No USB without USB protocol            01/01/70 00:00      
                     with minimum MCU            01/01/70 00:00      
                        Forget about it - no bitbanged USB!            01/01/70 00:00      
                        Additonal Comments            01/01/70 00:00      
                           budget and stock            01/01/70 00:00      
                              Silabs C8051F326            01/01/70 00:00      
                                 the package            01/01/70 00:00      
                                    ease of soldering            01/01/70 00:00      
                                       re: ease of soldering            01/01/70 00:00      
                                          handmade            01/01/70 00:00      
                                          Good yield            01/01/70 00:00      
                                             always possible to machine solder at near 100% yield            01/01/70 00:00      
                                                Important proviso            01/01/70 00:00      
                                             Better subcontractor            01/01/70 00:00      
                           found but..            01/01/70 00:00      
                              Found what?            01/01/70 00:00      
                                 reffering            01/01/70 00:00      

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