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  • Harshad Italiya

    @harshad-ukH5ww • Apr 3, 2013

    Its because of internal circuitry of MAX232 which boosts up voltage upto +15 volt which is RS232 Low logic and -15 volt which is RS232 High logic.

  • arunchary

    @arunchary-VtqB3c • Apr 15, 2013

    Thank you sir.............