LSF0108: LSF0108 slew rate too slow

The application report Voltage-Level Translation With the LSF Family (SLVA675) says:

5.4 What is the frequency range of the LSF?

The LSF family can translate up at 100 MHz and down at 200 MHz with reasonably good signal integrity. Signal integrity for translation depends on many factors, including line capacitance, output load, and pullup resistor sizes. Generally, smaller pullup resistors allow faster translation, but at the expense of power.

Those 10 kΩ resistors are certainly too large. Depending on the frequency, you might also want to reduce the pull-ups on the B side.

Hi Anne,

As per the datasheet, the VrefB and EN are connected together using the 200k biasing resistors.
Here, you have another input connected to the EN pin, and connected to the VrefB pin. Please confirm the connection.
Also notice that the 2 resistors on the B side are unpopulated even though they are designated as the output. Please let me know if you have any other concerns.

Hi Anne,

There is no max as such for this device as compared to TXB/TXS.

The Cload is referencing to the output and with smaller loading, higher Rpullup can be used or theoretically can achieve higher speeds at the expense of power consumption.