• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 21 subscribers
  • Views 639 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

LSF0204: Standard Logic Levels

Muhammed Mufeed
Prodigy 40 points

Part Number: LSF0204

Hi TI Team,

We are using LSF0204RU in one of our project. Can you help me to find DC logic levels (Voh, Vol, Vih and Vil) levels of the same. For open drain case we can consider pullup values, but in push-pull case how to calculate these values. As per my understanding for push pull application pullups not needed. I am using this part to translate 3.3V to 1.8V and 3.3V to 1.2V in push pull application.
  • 0
    Guru 326880 points

    This device does have digital inputs or outputs. When any I/O is lower than Vref_A, the MOSFET switches on and connects the A and B pins.

    So VIL is Vref_A; VIH is Vref_A plus the threshold voltage (about 0.8 V). VOL is the input voltage plus the voltage drop over the transistor, which is the current though the device times the on resistance. VOH is determined by the pull-up resistor on the output side. (The output side always needs a pull-up resistor, except when downtranslating B-to-A with very slow signals, in which case the output is clamped to about Vref_A.)