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Capacitors pin 10 and 13, UC2903

Hi,

 

I have some questions about UC2903.

 

1: Should the capacitors at pin 10 and 13 be ceramic /unpolorized ? Or can they be polorized tantal ?

2: What happens if both capacitors are connected to gnd ?

3: Is there any difference if the capacitor to pin 13 is connected to Vref (2.5V) or supply (11.0V)

 

  • Hi Tomas,

    I am assuming you are the talking about either the DIL-18 or SOIC-18 package (different packages have different pin numbers)

    1: Should the capacitors at pin 10 and 13 be ceramic /unpolorized ? or can they be polorized tantal ?
    The can be either polarized or or not, so ceramic or tantalum capacitors are OK.

    2: What happens if both capacitors are connected to gnd ?
    This part is intended to have the capacitor VREF and pin 13, connecting it to GND instead of VREF would affect your timing.

    3: Is there any difference if the capacitor to pin 13 is connected to Vref (2.5V) or supply (11.0V).
    Similarly to last question, connecting it to a 11 V supply instead of VREF would affect your timing.

    Regards,
    Victor