Hello,
My customer uses the DS90CR286A.
When he shutdown a transmitter and differential input pins of the DS90CR286A are high-Z.
Then there is a glitch at the DS90CR286A output.
He wants to disappear this glitch.
Could you give me any ideas?
Regards,
Naoki Aoyama
Hi Naoki-san,
In the event that the transmitter outputs are shut down, the DS90CR286A receiver has fail-safe bias circuitry at the input that should pull the receiver outputs to a stable HIGH if an input clock signal is present. If the input clock signal is either terminated or floating, the output will remain in its last valid state. Given your description, the DS90CR286A output should remain in its last known valid state. Is this what your customer is seeing when he reports a "glitch"? (See datasheet reference below)
If you would like to force the outputs to a certain state if the receiver inputs are Hi-Z, I recommend using external pull-ups or pull-downs at the DS90CR286A output.
Thanks,
Michael
