June 1, 2021
May 16, 2021

1NT591A - array of 2 npn BJT transistors : weekend die-shot

Designed for input stages of differential amplifiers. Datecode 0675.
Die size 1241x748 µm.

May 1, 2021

Motorola MC1553G - video amplifier : weekend die-shot

Not an opamp. 35Mhz bandwidth, 52dB gain. Datecode 736. Schematics below.
Die size 1062x1062 µm.

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April 27, 2021

Analog AD570 - 8-bit SAR ADC : weekend die-shot

Everything is laser trimmed. Die photo matches datasheet. Datecode 8302. Thanks to Florian for saving this chip!
Die size 3786x3006 µm.

April 1, 2021

1KT901 - 5 channel analog MOSFET commutator : weekend die-shot

1KT901 is a 5-channel analog MOSFET commutator. <300 Ohm channel resistance in open state for -20V on the gate. Datecode 0575.
Some information and references to internal schematics could be found in 701mk12 documentation.

March 15, 2021

Motorola MC358G - ECL J-K Flip-Flop (1964) : weekend die-shot

Motorola MC358G is not an opamp. According to scarce information we've found (it is so far pre-internet - no scanned datasheet, made in 1964) it's a ECL J-K flip-flop. Die photo matches image from The National Museum of American History at Smithsonian. This chip is 57 years old, oldest among Zeptobars specimens. Motorola gets bonus points for pad in the middle of the die.

Die size 2016x1517 µm. Bond-wires feel more fragile than usual. Need to run EDS on them...

March 7, 2021

Philips NE567D - tone-decoder/PLL : weekend die-shot

Die size 787x756 µm. Surprisingly, schematics are included in the datasheet (see below).

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