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06/30/10 15:15
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 		 #177004 - Vcc decoupling can be critical...
Responding to: ???'s previous message
...with this large DIP, especially if the GND and VCC pins are located at the corners of package.

Some of such chips already have some decoupling right on the die and can live with longer traces, though.

Microchip also sells micros in the DIP40 package, but they have the GND and VCC pins centered in the middle of the package. So, they can provide rather short distances for the decoupling currents.

Kai Klaas

List of 40 messages in thread
TopicAuthorDate
8051 core mc with adc            01/01/70 00:00      
   8051 in PDIP            01/01/70 00:00      
   it's time to give up            01/01/70 00:00      
   AT89LP6440            01/01/70 00:00      
      Only hunt DIL if this is a one-off hobby project            01/01/70 00:00      
      AT89LP6440            01/01/70 00:00      
         if you are worried about the cost ...            01/01/70 00:00      
            why not DIP?            01/01/70 00:00      
               Vcc decoupling can be critical...            01/01/70 00:00      
               SMD is far better than a DIP            01/01/70 00:00      
               oh yes, there is            01/01/70 00:00      
                  dip package            01/01/70 00:00      
                     Most SMD are manually solderable            01/01/70 00:00      
                        agree with Per            01/01/70 00:00      
               One & only advantage of DIP?            01/01/70 00:00      
                  DIP not bad - but not economical or future proof            01/01/70 00:00      
               only in relation to ...            01/01/70 00:00      
         Use ISP programming...            01/01/70 00:00      
            original isp cable            01/01/70 00:00      
               With a simple piece of code...            01/01/70 00:00      
                  onchip debug features            01/01/70 00:00      
                     rather            01/01/70 00:00      
                        AT89LP6440            01/01/70 00:00      
                           You don't *need* to change much            01/01/70 00:00      
                              OCD            01/01/70 00:00      
                                 OCD is (almost) an on-chip ICE            01/01/70 00:00      
                                    OCD            01/01/70 00:00      
                                       That's about it            01/01/70 00:00      
                                          keil            01/01/70 00:00      
                                             if it is PK51            01/01/70 00:00      
                                             See Keil website            01/01/70 00:00      
                                                even if it is not there            01/01/70 00:00      
                                       not quite            01/01/70 00:00      
                                          not quite - nearly            01/01/70 00:00      
                     RE: i will have to study the data sheet            01/01/70 00:00      
            original cable            01/01/70 00:00      
               what does ISP have to do with simulation?            01/01/70 00:00      
                  Nothing - but did he mean "emulator" ?            01/01/70 00:00      
   why noy use some LPC ADC?            01/01/70 00:00      
   8051 core mc with adc            01/01/70 00:00      

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