Uncapped: The Apple U1 Ultra-Wideband Chip in the AirTag #Dieshot #ReverseEngineering @Apple
The new Apple‑designed U1 chip uses Ultra Wideband technology for spatial awareness—allowing iPhone 11, iPhone 11 Pro, and iPhone 11 Pro Max or later iPhone models and the new Apple AirTag to precisely locate other U1‑equipped Apple devices.
The Silicon Archive had taken an AirTag and removed the U1. Taking the cover off shows the components inside:
U1 chip removed from Apple Airtag using hot air.
U1 Markings: 1HJV
And getting to the silicon die of the main chip:
Immersed in HNO3 to remove encapsulant to reveal package components. Then boiled in H2SO4 to remove from
package substrate. Markings: 338S00539 P04RV4.L2 99KBB686AL 1946
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