Other Parts Discussed in Thread: TXB0104,
Tool/software:
Hello,
There are lot of confusions regarding the pull up resistor limitations of both LSF0204 & TXB0104 bidirectional bus switch & level translator respectively.
Comparatively it seems TI recommending TXB series over LSF series.Please give feedback on the below queries
1. It is recommended to not to use any pull up resistors for TXB series. How can I connect QSPI chip select without pull up?. In an on going design, I have added 4.7k ohm pull up for chip select alone. Will there be an issue?
2. I will use LSF series for just level translation b/w master QSPI chip to a QSPI Flash with shorter distance. Sink currents of both devices will be of few 10's of uA. Can I proceed with suitable pull ups on both sides of LSF chip?
3. In most of the forum queries I have seen, if some one clarifies about using LSF series, the feedback is found to be 50-50 assurance of using this chip. If this LSF series is having this much limitation, why can't TI just obselete the part? Or can it be declared as only can be used with open drain IO's? Checked multiple forum feedback and still not confident enough to use this series with push pull devices on both sides.
4. Is there any bidirectional level translator part without these pull up limitations that can be confidently used for SPI, QSPI, JTAG etc ?
Regards
Hafiz Haja
