February 28, 2020
BF862 - low-noise N-Channel JFET : real vs fake : weekend die-shot
Designed for AM radio preamps, but found much wider use in low-noise amplifiers.Genuine part first, from reliable EU supplier. SMD marking 2AW 6o. Die size 358x358 µm. Die crack is on me.
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February 22, 2020
Guangdong Hottech BC848C - Genuine Chinese BJT : weekend die-shot
Guangdong Hottech BC848C - general purpose BJT, made in China, and sold as a genuine Chinese product by lcsc.com. Layout is typical, metalization lithography is somewhat rough, not sure if it affects performance. Die size 284x284 µm.
February 19, 2020
K544UD1A - Russian JFET opamp : weekend die-shot
Manufactured in 2016, similar to µA740C. Die size 1853x1552 µm.
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January 31, 2020
140UD9 - general purpose Soviet opamp (1989) : weekend die-shot
Like some of the K140UD2B this one has polymer overcoat, which causes interference pattern across the area due to thickness non-uniformity. 140UD9 is similar to CA3047 with differences in the final amplification stage.Die size 1780x1780 µm.
January 1, 2020
1977 Unisonic Blackjack - Rockwell A4821 PMOS uC : weekend die-shot
You can read about reverse engineering of this chip here (+following parts) and here, some information about the game is here.
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December 26, 2019
December 9, 2019
Infineon BFP540FESD - 30Ghz fT NPN BJT : weekend die-shot
Not often we see multiple metal layers in BJT's. Die size 246x223 µm.