• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 21 subscribers
  • Views 453 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.

TXS0104E: TXS0104ERGYR

Buck Patel
Prodigy 50 points
Part Number: TXS0104E
Other Parts Discussed in Thread: TXB0104

I am using the TXS0104ERGYR BIDIRECTIONAL translator. One side Vcca = 1.8V (driven as a GPIO pin from a iMX7 processor), other side of TXS part is 3.3V for local devices.  

The Voh (min) from iMX7 is 1.44V.

The Vih (min) to TXS part is "Vcca - 0.2V" = 1.6V. I am worried this may cause a "high" from the iMX7 not be pass thru the translator. See data sheet 6.3 Recommended Operating Condition".

I am surprised that the TXS part requires Vih just 0.2V from the 1.8V rail - Is this correct? How can I correct this? I have looked at other TI parts, - I do not want to look at other voltage translation parts that require external pull-up on each I/O pins. 

Thanks

Buck Patel   

 

  • 0
    TI__Mastermind 46465 points
    Hi Buck,

    Since you are connecting our device to a push pull driver, you could use the TXB0104 in this application. The TXS0104 is better suited from open-drain drivers like you would see with I2C interfaces. The TXB0104 doesn't require you to use external pull-ups/pull-downs.

    On a side note that Voh (min) value probably has some output current condition, which I don't believe will be met if you are driving other CMOS inputs. So I wouldn't expect it to drop much from 1.8 V.