• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 30 subscribers
  • Views 260 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.

TMP303: output-pin termination

Sainer Siagian
Intellectual 370 points
Part Number: TMP303

Hi,

I have a plan to useTMP303 as temperature fuse.

Is OUT-pin fixed to certain value (H or L) when the Power is ON?. I need to know whether pulldown resistor needed or not,

since I want to use it as an input to digital device. In my understanding, it is, since the temperature is already fixed to a certain value

when Power-ON. 

Thank you

Sainer 

  • 0
    TI__Guru* 91146 points

    Dear Sainer - 

    The OUT pin of the TMP303 is a push-pull, active-high output. When the measured temperature is beyond the trip point range, and the Set Output High (SOH) pin is low, the OUT pin is high. The SOH pin is an input pin with an internal pulldown resistor. When the SOH pin is forced high, the OUT pin goes high regardless of the measured temperature. The pin functions table on page 3 of the datasheet also states a pull-up is not required. This means that the OUT pin is pulled low by default. Figure 7 on page 7 also shows the pin is low on power up. Hope that helps you out. 

  • 0 in reply to Josh Wyatt
    Intellectual 370 points

    Hello Josh,

    This is very helpful.

    Thank you so much.

    Sainer