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input and output MAX232

Other Parts Discussed in Thread: MAX232

I work an existing schema, the MAX232 is connected :

the inputs (10 and 11) were connected together to the same pin of the Controllers.

the outputs (7 and 14) were connected together to the same pin of the receiver.

my question is :

  1. The RS232 output working properly?
  2. What is the role of connected the 2 output together ?

cordially

 

  • Mahfoud,

    The inputs and outputs can be connected together, but it is not required nor recommended. The outputs may have a little timing skew but I do not foresee this being an issue. Two channels in parallel will increase the output signal under load.

    For one channel operation it is best to connect the unused TIN input to VCC through a resistor. This will use less power.