Apple A4

system on a chip (SoC) designed by Apple Inc.

The Apple A4 is a microprocessor designed by Apple and manufactured by Samsung[1] and first used in the iPad tablet computer,[2] then in the iPhone 4 smartphone.[3] It was also used in the iPod Touch (4th generation).

Apple A4
ProducedMarch 2010
Designed byApple Inc.
Max. CPU clock rate1 GHz (iPad) 
Instruction setARM v7
Number of cores1
L1 cache64 KB
L2 cache640 KB



Apple announced the A4 on January 27, 2010, during their "Latest Creation" event.[2]

On June 7, 2010, Steve Jobs publicly confirmed that the iPhone 4 would contain the A4 Processor, which is underclocked from 1.0 GHz to 800 MHz..[3]

Timeline of Apple silicon

Apple U1Apple H1Apple W3Apple W2Apple W1Apple T2Apple T1Apple S7Apple S6Apple S5Apple S4Apple S3Apple S2Apple S1PApple S1Apple M1 UltraApple M1 MaxApple M1 ProApple M1Apple A15Apple A14Apple A13Apple A12ZApple A12XApple A12Apple A11Apple A10XApple A10Apple A9XApple A9Apple A8XApple A8Apple A7Apple A6XApple A6XApple A6Apple A5XApple A5Apple A4
Sources: Apple press release library,[4] Mactracker Apple Inc. model database[5]


  1. Clark, Don (2010-04-05). "Apple iPad Taps Familiar Component Suppliers -". Retrieved 2010-04-15.
  2. 2.0 2.1 "Apple Launches iPad" (Press release). Apple. 2010-01-27. Retrieved 2010-01-28.
  3. 3.0 3.1 "iPhone 4 design". Apple. 2010-07-06.
  4. Apple Inc., Apple press release library, Retrieved September 19, 2007.
  5. Mactracker (, Apple Inc. model database, version as of July 26, 2007.

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