Apple A4

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<div style="font: bold 2em/1.2 -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', Helvetica, Arial, sans-serif; color: var(--wiki-color);">Apple A4</div>
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! class="ios-lab" | Designer
| class="ios-val" | [[Apple]]
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! class="ios-lab" | Introduced
| class="ios-val" | January 2010 (iPad); June 2010 ([[iPhone 4]])
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! class="ios-lab" | Process
| class="ios-val" | 45 nm (Samsung)
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! class="ios-lab" | CPU
| class="ios-val" | 1 GHz Cortex-A8 (single core)
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! class="ios-lab" | GPU
| class="ios-val" | PowerVR SGX535
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! class="ios-lab" | Devices
| class="ios-val" | iPad · [[iPhone 4]] · iPod touch (4th) · Apple TV (2nd)
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! class="ios-lab" | Successor
| class="ios-val" | [[Apple A5]]
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The Apple A4 is [[Apple]]'s first self-branded system-on-chip, introduced with the original iPad in January 2010 and carried into the [[iPhone 4]] that June. Built on Samsung's 45 nm process around a licensed Cortex-A8 core (1 GHz in the iPad, ~800 MHz in the phone) with PowerVR graphics, it was less a radical design than a declaration: following the 2008 P.A. Semi acquisition, Apple would control its own silicon roadmap.

= Legacy =

The A4 began the annual Apple chip cadence and the tight chip-to-product tuning that became the program's signature. Every processor Apple ships today — through the [[Apple A19]] and the M series — descends from the organization this chip stood up.