February 27, 2018

Diodes (?) AH284 - brushless fan controller with integrated hall sensor : weekend die-shot

We've found this chip inside ThermalRight X-silent 120 fan. Chip has markings 284 9511 which probably means it is Diodes AH284 (or compatible). On the chip there are 2 power FETs and hall-effect sensor.
Die size 1360x1118 µm.

December 10, 2017

MOC3061 - Zero-cross optoisolated triac driver : weekend die-shot

MOC3061 contains infrared LED and small zero-cross phototriac to drive large external power triac. Photosensitive area is part of the triac itself.
Die size 1378x1309 µm.

November 27, 2017

Noname LED blinker : weekend die-shot

This is the chip found in simplest possible device one could sell - blinking warning light made somewhere in China, which flashes 2 red LEDs sequentially. Chip was bonded directly to PCB.

Chip internals are more complicated than one would imagine - there are 5 LED channels, only 2 of which are used here. Layout resembles other blinkers we've seen in the past (flicker, RGB). It's fascinating that there is a company somewhere specialized in making LED blinkers of various kind and doing just fine.

Die size 587x479 µm.

October 31, 2017

UMC UA6538 - Dendy (NES compatible) PPU : weekend die-shot

UMC UA6538 was a "GPU" (called PPU - "picture processing unit" at the time) of a Dendy, NES-compatible console which was very popular in Russia until late 90's. Decap was done for reverse engineering of differences vs original NES at nesdev.com.

Die size 4578x4069 µm.

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October 3, 2017

Philips NE5532A : weekend die-shot

Another genuine NE5532A from Philips. You can see it is much more similar to genuine Ti NE5532 than to fake.

October 3, 2017

Ti NE5532 - real vs fake : weekend die-shot

We have spotted yet another real/fake pair of very common microchip. This time it is Ti NE5532. NE5532 is a very fine opamp which will do just fine in 99% of audio applications. I afraid it got at bit of bad fame due to fakes which have quantitatively slower slew rate and sound objectively worse.

Genuine Ti NE5532 has die size of 2103x2154µm.

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September 17, 2017

ST TSC1031IDT 70V high-side current sense amplifier : weekend die-shot

STMicroelectronics TSC1031 allows to amplify differential signal with high common-mode voltage (up to 70V) while having low VCC (2.7 to 5.5V) which is very useful for high-side current sensing.

Die size 422x437 µm.