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  • TI Thinks Resolved

MAX3232: Driving capability of MAX3232

Intellectual 710 points

Replies: 4

Views: 59

Part Number: MAX3232

HI Team,

 

Which spec in the datasheet is related to the driving capability of MAX3232?

 I didn't find the spec such as: maximum output current, maximum drive current and so on in the datasheet of MAX3232.

Best regards

Zhihong Huangs

  • HI Zhihong,

    This is best specified by the minimum VOH/VOL specifications, which are given in Section 6.6 for a worst-case RS-232 load condition of 3 kOhm.  You can see how these voltages vary with load current for a typical device by referencing Figures 1 and 2.  Please let me know if this is unclear or if you have further questions.

    Regards,
    Max

  • In reply to Max Robertson:

    HI Max,

     

    Thanks for your reply.

       1. Why does the output current change with the VOH?  how does the output of the driver in MAX3232 work when the VOH changes ?  

    Best regards

    Zhihong Huangs

  • In reply to Wesley Huang:

    Hello,

    You could actually think of it the other way - i.e., the voltage reduces as the load current increases.  This is due to the non-zero output impedance of the driver circuit.

    Max

  • In reply to Max Robertson:

    HI Max,

     

    Get this.

    Thanks for your reply.

    Best regards

    Zhihong Huangs

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