With only 8 pins there are 6 IO. However it’s clear there are many more bond pads on this die. We now see a die which is designed to be packaged in a variety of body styles: some with more pins, some less.
The die size is just a bit larger than the super-inexpensive PFS150. 0.403 mm2 vs 0.276 mm2.
For that die area one gets an 8 bit ADC,1 band gap (good for precision voltages) and 1x more 8 bit timer.
Below is the die annotated (the reason they are de-capping so many parts is to try to tease out what each block looks like. As features are added or removed it should have a visible effect on the design.)
See the blog post for additional details and close-ups.
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