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?
thanks
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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.
Regards,
Alan
TXB0104
yes, i already communicated with customer and suggest them to pull up to 3.3V. , they will consider it.