What is the easiest way to communicate with a device that the bus voltage is 1V, and the clock frequency is 30 Mhz?
TI has a dual PECL differential line driver/receiver. Needs +5v, which is not what you want.
But turn that upside down, and use PNPs (diffpairs/tailcurrents) and a few hundred millivolt swings into 50Ohms to ground, and you have a very viable link.