October 26, 2015
October 26, 2015
CHANGJIANG MMBT2222A - npn BJT transistor : weekend die-shot
Unlike OnSemi MMBT2222A CHANGJIANG MMBT2222A has both smaller die size and simpler layout (BC847-like) - which should cause significantly lower hFE on high collector currents.Die size 234x234 µm.
October 19, 2015
Linear LT1021-5 ±0.05% precision reference : weekend die-shot
Expected heavy duty digital correction? Nope. Just 15 fuses and buried Zener - truly a work of art.Die size 2354x1364 µm.
October 19, 2015
October 11, 2015
ST UA741 - the opamp : weekend die-shot
µA741 was the first "usable", widespread solid state opamp, mainly due to integrated capacitor for frequency correction (which we now take for granted in general-purpose opamps). This chip was reimplemented numerous times since 1968, like this ST UA741 in 2001. You can also take a look at historic schematic of µA741 here.Die size 1073x993 µm.
September 26, 2015
Diodes BC847BS - matched BJT pair : weekend die-shot
Diodes Incorporated BC847BS - pair of npn transistors with matched hFE. Internally it has 2 separate dies.Die size 306x306 µm.
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September 24, 2015
TL431 - adjustable shunt regulator : weekend die-shot
TL431 is another adjustable shunt regulator often used in linear supplies with external power transistor.Die size 592x549 µm.
