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What is this device? "MCL 0 322", followed by "ADT 1-1W"?


Frank, Frank

Jan 1, 1970
It has 6 legs, corn yellow, approximately 0.8mm X 0.5mm X 0.3mm,
the two rows of text are
"MCL 0 322"
"ADT 1-1W"

Third row has a dot. I found two of this device on my 105MS ADC board,
while on another piece of board, somebody took off this chip. This makes me
wonder what the purpose of this chip is.

Hope you could help.