Silicon Labs Si8641 - quad channel digital isolator : weekend die-shot

Silicon Labs Si8641 uses capacitive coupling to implement digital isolation (up to 5kV, this model 2.5kV) as speeds of up to 1 Mbps.
This particular model (Si8641AB) contains 2 identical dies, apparently configured by bonding some of the pads on the sides.



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You can now support Zeptobars at Patreon and more

We are running this blog for more than 3 years with no monetization of any kind (advertisements, merchandise and such) but from time to time people kept asking on how to help us. From the other side - we've probably reached the limits of our resources to improve the quality of our lab/imaging setup, and we'll need your help to move further.

We've finally outlined a number of voluntary ways you can support our efforts to produce higher-quality microchip photographs for curiosity and education.

Basically, there are 4 ways - spread the word, send us few cool chips for future work, support us at our Patreon campaign (which would allow you to schedule small contribution for each new die shot we publish) or send us some Bitcoins (or use good old Paypal).

Either way content of this blog will remain free for everyone and it will continue to be licensed under permissive CC BY 3.0 license.

ST HCF4056 - BCD to 7 segment : weekend die-shot

ST HCF4056 is a CMOS BCD to 7 segment decoder/driver with strobed latch.

Maxim ds2401z - serial number chip : weekend die-shot

Dallas Semiconductor/Maxim DS2401 is a factory pre-programmed silicon serial number chip.
Right at the center of the die you can see 64-bit laser-trimmed ROM. Die size 1346x686 µm.

ST TL072 - dual JFET opamp : weekend die-shot

Die size 1547x1279 µm.

NXP/Philips BC857BS - dual pnp BJT : weekend die-shot

SOT-363 package contains 2 separate identical transistor dies.
Size of each die is 285x259 µm.

ST TS971 : weekend die-shot

ST TS321 is a single 12 MHz R2R opamp in SOT23-5 package with low noise and low distortion.
Die size 1079x799 µm.