Resources for electronic reverse engineering.
Marking Code References
SOT23 Marking Code
Check out the SOT23 Marking Code here.
Footprint similar to SOT23-3 (pitch 1.9mm) but smaller in size are
SC-70-3 (1.3mm), SOT323 (1.3mm), SOT416 (1mm)
Diode Marking Code
Check out the Diode Marking Code here.
National Semiconductor IC chip marking convention
Active SMD Components
Marking Codes, Marking Style, Characteristics Pinout
Reference Designator on PCB board