|Produced||From March 2011 (A5) to Present|
|Designed by||Apple Inc.|
|Max. CPU clock rate||800 MHz (iPhone 4S, iPod Touch 5th generation) to 1 GHz (iPad 2, iPad mini)|
|Min. feature size||45 nm to 32 nm|
|Instruction set||ARM v7|
|Product code||S5L8940X (45 nm)
S5L8942X (32 nm)
S5L8947X (Single core, 32 nm)
|Cores||1 or 2|
|L1 cache||32 KiB instruction + 32 KiB data|
|L2 cache||1 MiB|
The Apple A5 is a system-on-a-chip designed by Apple Inc. and manufactured by Samsung to replace the Apple A4. The processors commercially debuted with the release of Apple's iPad 2 tablet, and also powers the iPhone 4S, iPod Touch fifth generation, and the iPad mini. This is consistent with how Apple debuted the A4 chip: first in the original iPad, followed by the iPhone 4, and then the iPod Touch (fourth generation).
The A5 consists of a dual-core ARM Cortex-A9 MPCore CPU with NEON SIMD accelerator and a dual core PowerVR SGX543MP2 GPU. Apple lists the A5 to be clocked at 1 GHz on the iPad 2's technical specifications page, though it can dynamically adjust its frequency to save battery life. The unit used in the iPhone 4S is clocked at approximately 800 MHz. Apple has also included an image signal processor unit (ISP) that will do advanced image post-processing such as face detection, white balance and automatic image stabilization and an "earSmart" unit from Audience for noise canceling.
Apple has stated that the CPU portion of the A5 is twice as powerful as the original iPad,[clarification needed] and that the graphics processing unit (GPU) up to seven times as powerful as its predecessor, the Apple A4. The A5 package contains 512 MB of low-power DDR2 RAM clocked at 533 MHz. When the A5 was first released, it was estimated at that time to cost 75% more than the previous generation, with the difference expected to diminish as production increased.
As of August 2012[update], the A5 is manufactured at Samsung's Austin, Texas factory. Samsung invested $3.6 billion in a facility in Austin to produce chips such as processors, and nearly all of that wing's output is dedicated to Apple components. Samsung has invested a further $4.2 billion at the Austin facility in order to transition to a 28 nm fabrication process by the second half of 2013.
Apple A5 (S5L8940) 
Apple uses the first version A5 chip in the iPhone 4S, and iPad 2. Its manufacturing process is 45 nm having 122.2 mm2 of die area and manufactured in a package on package (PoP) together with RAM.
Apple A5 (S5L8942) 
Apple uses a second version of the A5 chip in the Apple TV third generation, announced on March 7, 2012, the iPod Touch fifth generation, the iPad mini and the 32 nm revision of the iPad 2. This chip is manufactured with a 32 nm fabrication process, with ID code S5L8942 and it has one core disabled in the Apple TV. The new A5 measures nearly 41% smaller than first-generation A5, coming in at 69.6 mm2 and manufactured in a package on package (PoP) together with RAM.
Apple A5 (S5L8947) 
In March 2013, Apple released an updated version of the third generation Apple TV (AppleTV3,2) containing a smaller, single core version of the A5 processor, and with no stacked RAM in the package. The chip is very small, just 6.1×6.2 mm, but as the decrease in size is not due to a decrease in feature size (it is still on a 32 nm fabrication process), this indicates that this A5 revision is of a new design. Markings tell that it's named APL7498, and in software, the chip is called S5L8947.
Products that include the Apple A5 
- iPad 2 (A5 dual-core 45 nm) – March 2011; (A5 dual-core 32 nm) – March 2012
- iPhone 4S (A5 dual-core 45 nm) – October 2011
- Apple TV 3rd generation (A5 single-core, 32 nm) – March 2012
- iPod Touch 5th generation (A5 dual-core 32 nm) – October 2012
- iPad Mini (A5 dual-core 32 nm) – November 2012
These images are illustrations and not to scale.
See also 
- Apple system on chips, the series of ARM based system-on-a-chip (SoC) processors designed by Apple for their consumer electronic devices.
- Apple A5X
- PowerVR SGX GPUs were also used in the iPhone 3GS and the iPod Touch (3rd generation).
- PWRficient, a processor designed by P.A. Semi, a company Apple acquired to form an in-house custom chip design department.
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- A5 Chip in Tweaked Apple TV Still Manufactured by Samsung at 32nm - MacRumors.com
- Tweaked Apple TV Contains Die-Shrunk A5 Chip, Not A5X - MacRumors.com