NASA Office of Logic Design

A scientific study of the problems of digital engineering for space flight systems,
with a view to their practical solution.

xapp080.pdf	"Supply-Voltage Migration, 5V to 3.3V." Covers background on processing technologies with implications for supply voltages, distributing multiple supply voltages on a PCB, interfacing between devices operated at different supply voltages, supply voltage sequencing considerations, and migrating designs. Xilinx Corp. (.pdf 47 kbytes)
FPGA-FAQ They moved the page to "agere systems" and I can't find it there.	5V "Tolerant" Parts Driving 5 Volt Logic. Lucent Technologies (.htm)