Apple S2
General information
LaunchedSeptember, 2016
DiscontinuedSeptember, 2017
Designed byApple Inc.
Max. CPU clock rate520 MHz[1] 
Architecture and classification
ApplicationApple Watch Series 2
Technology node16 nm
Instruction setARM – ARMv7-A
Physical specifications
Products, models, variants
Predecessor(s)Apple S1
Successor(s)Apple S3

The Apple S2 is the integrated computer in the Apple Watch Series 2, and it is described as a "System in Package" (SiP) by Apple Inc. It was revealed on September 7, 2016, with very little info about specifications.[2] Apple says its two cores deliver 50% higher performance and the GPU delivers twice as much as the predecessor, the Apple S1.[3] The S1P SiP shipped in the Apple Watch Series 1 is a stripped down version of the S2 that lacks the GPS functionality, it is otherwise identical.[4]

System-in-Package design

It uses a customized application processor that together with 512 MB memory,[1] 8 GB storage[1] and support processors for wireless connectivity, GPS, sensors and I/O constitute a complete computer in a single package. This package is filled with resin for durability.


The device integrates discrete components like Wi-Fi, Bluetooth, GPS, NFC, touch controller, accelerometers, barometric sensor[5] and RAM. In total, there are 42 individual silicon dies[6] integrated into the single S2 component.


See also


  1. ^ a b c d Chester, Brandon (December 20, 2016). "The Apple Watch Series 2 Review: Building Towards Maturity". AnandTech. Archived from the original on October 22, 2017. Retrieved October 12, 2017.
  2. ^ Merritt, Rick (September 7, 2016). "Apple Debuts Three Custom Chips". EE Times. Archived from the original on September 13, 2016. Retrieved October 25, 2017.
  3. ^ "Apple introduces Apple Watch Series 2, the ultimate device for a healthy life" (Press release). Apple. September 7, 2016. Archived from the original on November 16, 2017. Retrieved October 25, 2017.
  4. ^ Benjamin, Jeff (October 4, 2016). "PSA: The Apple Watch Series 1 is just as fast as Series 2". Archived from the original on November 8, 2021. Retrieved October 22, 2017.
  5. ^ "Apple Wartch Series 2 Teardown". iFixit. September 15, 2016. Archived from the original on October 7, 2020. Retrieved October 22, 2017.
  6. ^ Gingerich, Mandi; Morrison, Jim (September 28, 2017). "Apple Watch Series 2 Teardown". TechInsights. Archived from the original on April 19, 2017. Retrieved October 22, 2017.