March 16, 2014

Ti TS5A3159 - 1Ω analog switch : weekend die-shot

Ti TS5A3159 is an 1.65-5V 2:1 analog switch with ~1Ω matched channel resistance and "break-before-make" feature.
Die size 1017x631 µm, 1µm technology.

February 17, 2014

FTDI FT232RL: real vs fake

For quite some time when you buy FTDI FT232RL chips from shady suppliers you have a good chance of getting mysteriously buggy chip which only works with drivers 2.08.14 or earlier. We've got a pair of such FTDI FT232RL chips - one genuine and one fake and decided to check if there is an internal difference between them. On the following photo - left one is genuine, right one is fake. One can notice difference in marking - on genuine chip it's laser engraved while on buggy it is printed (although this is not a universal distinguishing factor for other chips).

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January 17, 2014

ST 34C02 - 2048-bit EEPROM : weekend die-shot

STMicroelectronics 34C02 is an 2048-bit EEPROM with hardwire write-protect and I2C interface, typically used as SPD chip in DIMM memory modules.
Die size 1542x1422 µm, 1.2µm half-pitch.

January 12, 2014

Microchip 24LCS52 : weekend die-shot

Microchip 24LCS52 is an 2048-bit EEPROM with I2C interface.
Die size 1880x1880 µm, 2µm half-pitch.

Closer look at charge-pump:

December 29, 2013

Invensense MPU6050 6-axis MEMS IMU : weekend die-shot

MEMS is probably the most requested thing we are asked about. Year ago we unsucesfully tried to take a photo of MPU6050. Now it's time for revenge!

Invensense MPU6050 is an integrated gyroscope and accelerometer with 16-bit readings. It contains 2 dies, soldered/welded face-to-face in multiple places (that's what was causing us troubles last time, required temperature for separation exceeded 600C).

On the overview photo you can see how not-flat they are. On a bigger die MEMS part is 28µm above surface, on smaller die - 100 µm above. Also, there is logic right under MEMS on the bigger die.

Size of big die is 2782x2718 µm, small die - 2778x2195 µm.

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December 23, 2013

1645RT2U - Milandr radhard antifuse ROM : weekend die-shot

1645RT2U - radhard 32k*8 antifuse ROM, designed by Milandr. Die size - 8232x8973 µm.
Minimal observed half-pitch - 680nm.

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November 4, 2013

LM2940L 1A LDO regulator : weekend die-shot

UTC LM2940L-5.0 - 1A low-dropout linear regulator.
Apparently 5 contacts at the bottom-right were used to fine-tune output voltage by burning fuses between them.