"This product is a MCM and contains:1 die on the 0.5um CMOS1 die on the 0.6um CMOS 1 die on the Micromachines"
mean in the link http://www.analog.com/en/quality-and-reliability/reliability-data/content/wafer-fabrication-data/fca.html
You can take two integrated circuits and put them on a pc board to accomplish a function.
We do the same thing: we take two different die and put them on a substrate and encapsulate them.
This is called a MultiChip Module (MCM).
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