Does the control signal of LMH6521/22 is compatible for 1.8V control signal ? like some FPGA IO output is 1.8V, does it can connect to LMH6521?
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.
As you can see in the datasheet, page 4, it is stated that the device is compatible with 3.3 and 2.5V LVCMOS. Also, its logic high voltage is 1.8V typ., which cannot be guaranteed by an 1.8V logic output. So I would say that you cannot connect the 1.8V output to this device.
Can the FPGA IO pins be configured with open drain outputs to allow external pull up resistors to 2.5/3.3 V rail to meet the VIH levels required for LMH6521 digital Inputs?
Otherwise, TI should offer level translation devices like TXB0104 to support this function.