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???
08/30/05 04:45
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#100261 - re: series termination
Responding to: ???'s previous message
Per Guldmann said:
Do you mean 47 ohm in series with the 74HC14 output, to isolate the chip from the kabel and the "nasty outside world", or did I get it wrong?


Yes, 47 ohms in between the chip and the cable. It's not so much to protect the driver from the outside world; rather, it's so you can match the driver impedance to the cable's impedance.

-a

List of 22 messages in thread
TopicAuthorDate
driving ribboncabel - ESD precautions            01/01/70 00:00      
   on interconnect            01/01/70 00:00      
      Alternative            01/01/70 00:00      
         comments.            01/01/70 00:00      
         Recommended scheme            01/01/70 00:00      
      74H?            01/01/70 00:00      
         nope            01/01/70 00:00      
   Don't forget series termination            01/01/70 00:00      
      series termination            01/01/70 00:00      
         re: series termination            01/01/70 00:00      
            an, in my opinion, much better way is to            01/01/70 00:00      
               Series termination is the correct method            01/01/70 00:00      
                  both?            01/01/70 00:00      
                     Series termination prevents overshot            01/01/70 00:00      
                  HUH?            01/01/70 00:00      
                     Huh Huh?            01/01/70 00:00      
                        read the original post            01/01/70 00:00      
                           Think about the newbies            01/01/70 00:00      
                              That is exacltly why I always push the u            01/01/70 00:00      
                                 RS485 is a good alternative, indeed            01/01/70 00:00      
                                    Use a relay driver and sleep well ...            01/01/70 00:00      
   ferite bead, series termination, or            01/01/70 00:00      

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