I know that the TX_DISABLE pin can be driven high to disable the laser driver and that driving it low will enable the driver. I have an application where they want to drive the TX_DISABLE low to enable but drive the pin high Z (or open) to disable. I see that the input impedance of the TX_DISABLE pin is listed as nominally 7.4K ohms. My question is, if I tie the TX_DISABLE input up using a 1K resistor, will the laser driver be disabled assuming no other stimulus (i.e. High Z or open) and then driving the input to a 0 level will enable the device? I believe this is how it should work. Let me know if there is an issue with my logic.
Thank you,
Michael Nycz
