January 2, 2022

Infineon BFP450 - highly linear low noise BJT, 24Ghz fT : weekend die-shot

I like that it is complex for a BJT, yet one can see everything without de-layering. You can compare it to BC858C (fT 250 MHz), BFP540 (fT 30 GHz) and BFR740 (fT 42 GHz). Apparently complexity explodes beyond 24Ghz.

Die size 526x456 µm.

January 1, 2022
November 1, 2021

Ti TMS0119 - single-chip calculator (1971) : weekend die-shot

Texas Instruments TMS0119 is part of TMS100-series of integrated single-chip calculators. Ti was first in the world (1971) to achieve this level of integration. Originally used in TI-2500 calculator. It is made using 10 um metal gate PMOS process (metal width = 10 um, metal spacing = 10 um, diffusion width = 10 um, diffusion spacing = 10 um).

You can read much more about Texas Instruments calculators & their microchips at http://www.datamath.org/, which is a result of countless years of Joerg Woerner's dedication.

Die size 5874x5800 µm.

October 11, 2021

Toshiba TC74HC181P - 4-bit ALU : weekend die-shot

Together with 74*182, Toshiba TC74HC181P could be used to build custom discrete CPU.
Die size 2730x2722 µm. Datecode 8813H.

August 2, 2021

AMD LF356H - JFET opamp : weekend die-shot

Surprised to see analog part from AMD? Me too. It's from the era when AMD was not yet crushing desktop CPU world like a hydraulic press.
Package photo below. Die size 1877x1120 µm. Datecode 8035YP.

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