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.
we are using 1.8 logic level and 3V3 logic level between two system and interface over RGMII interface. And need to support 800Mbps data rate at least.
Question are;
I think we have to use level shift for Tx/Rx Clock and Tx/Rx En but the others are all differential so I don’t think we have to use eight Rx/Tx differential data line. Is it correct?
If we have to use level shifter for eight data transmission line, please let me know why? And what issue happen w/o level shifter.
Hi Jaroon,
I have known the RGMII to be at 125Mhz or 250Mbps data rate but not at 800Mbps.
SN74AXC8T245 cant support 800Mbps data rate for the 1.8 <>3.3V translation. We also do not have devices which can support differential signaling( +/ - ).
considering Interface portfolio on different interfaces including differential signaling.
The devices might not work without level shifter unless the threshold of the 3.3V devices are above 1.8V.