• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 32 subscribers
  • Views 177 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TRS3232: Allowable input voltage specification for output pin

JH Shin
Mastermind 7145 points
Part Number: TRS3232

Hello,

Is there an allowable input voltage specification for the TRS3232 DOUT pin (PIN # 14) ? (Both positive and negative volts)
How many volts does the device get damaged when voltage is supplied to the DOUT pin ?
Regards,
JH
  • 0
    TI__Guru 62910 points

    Hi JH,

    Yes, the "Absolute Maximum" supported voltage range for the driver outputs is-13.2 V to +13.2 V.  This is found in Table 6.1 of the datasheet.  Please let us know if you have any further questions.

    Regards,
    Max

  • 0 in reply to Max Robertson
    Mastermind 7145 points

    Hi Max,

    Thank you for your reply.

    I want to know the voltage level that the output port can withstand when an externally unwanted voltage is accidentally input to the DOUT pin.
    Is this voltage level the same as the output drive voltage level ?

    Regards,

    JH

  • 0 in reply to JH Shin
    TI__Guru 62910 points

    The voltage range that can be withstood from an external source is +/- 13.2 V.  The device's own output level from the driver will be lower than this.

    Max

  • 0 in reply to Max Robertson
    Mastermind 7145 points

    Hi Max,

    It's my understanding that the voltage level of RS232 standard is up to ±15V.

    So, I think the DOUT pin should be able to withstand from an external source up to ±15V.

    I wonder why the DOUT of the TRS3232 is up to ±13.2V.

    Thanks in advance.

    JH

  • 0 in reply to JH Shin
    TI__Guru 62910 points

    Hi JH,

    An RS-232 transmitter is allowed to have an output voltage as high as +/- 15 V when connected to a standard receiver load.  So, receiver ports need to tolerate this voltage.  (Actually, they are required to tolerate the maximum open-circuit generator voltage of +/- 25 V).  The generator output just needs to be able to withstand open circuits or short circuit faults between it and any other conductor in the cable, though.  To my knowledge it is not required for it to withstand +/- 15 V.

    Max