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| A9 chip | |
|---|---|
| Name | A9 chip |
| Manufacturer | Apple Inc. |
| First release | 2015 |
| Architecture | 64-bit ARMv8-A |
| Process | 14 nm / 16 nm |
| Cores | dual-core |
| Gpu | PowerVR GT7600 |
| Used in | iPhone 6s, iPhone 6s Plus, iPhone SE (1st generation), iPad (5th generation) |
A9 chip
The A9 chip is a 64-bit system on a chip (SoC) developed by Apple Inc. and introduced in 2015 for mobile devices. It succeeded the A8 and preceded subsequent Apple-designed SoCs, appearing in flagship iPhone 6s, iPhone 6s Plus, iPhone SE (1st generation), and the iPad (5th generation). As part of Apple’s product lineup, it contributed to features used across iOS 9, iOS 10, and later iOS releases, influencing performance expectations in the smartphone industry.
The A9 chip combined CPU, GPU, cache, memory controller, and image signal processor into a unified SoC used by Apple Inc., integrating technologies referenced in announcements at events such as the Apple Worldwide Developers Conference and presentations by executives including Tim Cook and Phil Schiller. Its release occurred amid competition with SoCs from Qualcomm, Samsung Electronics, Huawei, and MediaTek, and it was evaluated by reviewers from outlets like The Verge, Engadget, TechCrunch, and AnandTech.
Apple designed the A9 using a 64-bit instruction set derived from ARM Ltd.'s ARMv8-A architecture, implementing a dual-core CPU with custom microarchitectural enhancements akin to prior designs disclosed in analyses by ARM Holdings partners. The GPU was a PowerVR GT7600, licensed from Imagination Technologies, and the chip contained an Apple-designed image signal processor used for camera improvements promoted alongside features in the iPhone 6s camera and Live Photos. Design discussions referenced semiconductor manufacturing processes from TSMC and Samsung Semiconductor, reflecting industry supply chain dynamics involving firms such as GlobalFoundries and Intel Corporation.
Benchmarks published by outlets including Geekbench, Basemark, and GFXBench measured single-core and multi-core performance against contemporaries such as the Snapdragon 820 and Exynos 7420. The A9 delivered notable gains over the A8 in CPU throughput and GPU rendering, affecting tasks demonstrated in demos for Metal (API), Metal 2, and graphics-intensive applications featured at Game Developers Conference. Performance metrics influenced app developers on platforms like App Store and tools from Xcode.
The A9 was produced by both Samsung Electronics and TSMC in separate 14 nm and 16 nm FinFET processes, respectively, resulting in variant chips with slight differences in power consumption and thermal characteristics analyzed by publications such as TechInsights and iFixit. These two fabrication sources were part of broader manufacturing ecosystems involving Taiwan Semiconductor Manufacturing Company and Samsung Foundry. Discussions about die shrink and process migration referenced roadmaps from International Business Machines, Texas Instruments, and standards committees including the IEEE.
Apple deployed the A9 in devices sold through Apple Store (retail) outlets and carriers including AT&T, Verizon Communications, T-Mobile US, and Sprint Corporation. Compatibility extended across versions of iOS beginning with iOS 9, enabling features showcased in hardware bundles like EarPods and accessories such as Apple Watch-paired services. Device support timelines intersected with Apple’s update policies, device registration records at Apple Support, and resale markets including Gazelle (company) and eBay.
The A9 incorporated a Secure Enclave coprocessor lineage introduced with earlier Apple SoCs to handle encrypted authentication, biometric data for Touch ID, and encryption tasks associated with Apple Pay. Security features tied into frameworks including Secure Enclave Processor and system-level protections coordinated with services like iCloud and developer tools in Xcode for app sandboxing and code signing enforced by policies from U.S. Copyright Office and standards from organizations such as National Institute of Standards and Technology.
Critical reception from technology journalists at Wired, CNET, Bloomberg News, and The Wall Street Journal emphasized the A9’s performance-per-watt improvements and its role in maintaining Apple’s competitive position against SoC manufacturers like Qualcomm and Samsung Electronics. The A9’s deployment influenced mobile game developers showcased at PAX and E3, camera feature adoption in devices reviewed by DXOMARK, and supply chain strategies studied by analysts at Gartner and IDC. Its legacy persisted in subsequent Apple silicon design decisions leading toward fully in-house architectures and efforts culminating in Apple’s later transition initiatives discussed in Apple Worldwide Developers Conference 2020.