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Unknown 16-pin bare die found in my lab while imaging backlog. No idea of function, vendor, or original markings.
Preliminary analysis:
1-metal 1-poly CMOS process
Large “herringbone” structures are pad drivers
Pad with trimmed corners is #1
Pad above it is #16, Vdd
Pad second from bottom on right is #8, Vss
Inner ring is Vss
Outer ring is Vdd
Some kind of 4-bit counter?