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Altera_Forum
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14 years ago

Some question about interconnect with LVTTL and LVPECL

Hello everyone: I am using a D flip-flop chip of ON semiconductor, attached is the datasheet. All of this chip's IO are ECL type. I have to control some pins (such as reset pin) from FPG...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Level conversion from 3.3V or 2.5V FPGA IOs to LVPECL can be done with resistive voltage dividers. For LVPECL to FPGA interface, use resistors and LVDS inputs.