I am working on a project to record and playback audio (to / from) a personal computer via USB.
Power from USB will be regulated to 3.3V and be used to power:
a. audio clocks FS, 64FS, 256FS
b. USB interface
c. logic to format the audio data
In addition, there will be a separate line based 3.3V supply to power A/D, D/A, DIR, DIT. and SRC.
There is a common ground between the two power grounds.
I have placed a buffer SN74LVC2G34 in series with each clock line and data line.
Question: If USB power is good, but the line based supply fails, will this result in failures of other chips?
