Car audio designs can drop external DRAM with Skyworks' new multi-core automotive audio DSP
Skyworks' SKY4680x automotive audio DSP puts 8 MB of SRAM on chip so some car audio designs skip external DRAM. Samples are out now; price is unstated.
- Format
- News
- Published
- November 10, 2026
- Length
- 997 words
Car audio engineers have a new automotive audio DSP that keeps its working memory on the chip. Skyworks Solutions said on November 10, 2026, in Munich, that its SKY4680x family carries 8 MB of SRAM, so some designs need no external DRAM, as older DDR4-class memory grows scarcer and costlier.
Key points
- Skyworks introduced the SKY4680x automotive audio DSP family on November 10, 2026, in one-, two- and three-core versions built on Cadence HiFi 5 DSP cores.
- Each chip has 8 MB of on-chip SRAM with ECC, and Skyworks says supported configurations need no external DRAM.
- The three-core version has more than 1.2 GHz of combined processing, and the family handles up to 64 audio channels (32 in, 32 out) in a 12 mm x 12 mm, 88-pin QFN package.
- Engineering samples and evaluation boards are available now; the announcement gives no price, no production date and no named automaker or Tier 1 customer.
Why does an audio DSP without external DRAM matter now?
Because memory has become one of the least predictable parts of a car's bill of materials. TrendForce reported in June 2026 that the three big DRAM makers keep moving wafers to HBM and server DRAM for AI, cutting supply of older DDR4-class parts, and estimated DDR2 contract prices would rise about 55–60% in 2Q26 and another 35–40% in 3Q26. An audio processor that runs from its own 8 MB of SRAM takes one memory chip off the board. Skyworks itself names "exposure to memory supply volatility" among the reasons, alongside BOM cost, board space and power.
What is the SKY4680x automotive audio DSP?
It is a family of audio processors for in-car sound systems. Skyworks' automotive audio line has so far covered tuners and digital radio processors, and the company says the SKY4680x lets a car's audio system do sound enhancement, immersive audio and routing on one part.
| Specification | SKY4680x |
|---|---|
| DSP cores | 1, 2 or 3 Cadence HiFi 5 cores |
| Processing (three-core version) | More than 1.2 GHz in total |
| Microcontroller | Arm Cortex-M3, customer-programmable, in some variants |
| On-chip memory | 8 MB SRAM with ECC |
| Audio channels | Up to 64 (32 in, 32 out) over nine I²S/TDM inputs and nine outputs |
| Package | 12 mm x 12 mm, 88-pin QFN |
| Availability | Engineering samples and evaluation boards now |
How does one DSP family cover entry-level and premium trims?
By keeping the software the same while the core count changes. Skyworks says OEMs and Tier 1 suppliers can write audio software once and run it on the one-core part in a base model and the three-core part in a premium one, choosing processing for each trim's cost. The company also says the chips run third-party audio IP, customers' own algorithms and edge AI, and come with a graphical development and tuning environment and an SDK.
"Automotive audio systems are evolving beyond traditional sound processing as automakers seek greater flexibility to deliver sophisticated in-cabin experiences, incorporating their own innovations and technologies from external partners. The SKY4680x family helps customers meet these evolving requirements while accelerating development and deployment across vehicle programs."
— Vivek Subramanian, Vice President of Product Line Management for Audio, Infotainment and Gaming, Skyworks
What should audio system designers check before committing?
Our analysis: the memory claim is the part to test first. Skyworks says external DRAM can be dropped only "in supported configurations" and does not say which ones, so designers will want to know how much of a premium immersive-audio workload fits in 8 MB before counting the saving. The release also gives no unit price, no AEC-Q100 grade, no production date and no customer, so it shows a part that is sampling, not one already designed into a car. Skyworks is showing it at electronica 2026 in Munich, which runs November 10 to 13, in Hall C4, Booth 440, with a demo that turns a two-channel source into multi-channel sound and an edge AI siren detector.
Frequently asked questions
What is the Skyworks SKY4680x?
It is a family of automotive audio DSPs that Skyworks introduced on November 10, 2026, with one, two or three Cadence HiFi 5 cores and 8 MB of on-chip SRAM.
Does the SKY4680x need external DRAM?
Skyworks says its 8 MB of integrated SRAM removes the need for external DRAM in supported configurations, but the announcement does not list which configurations those are.
How many audio channels does the SKY4680x support?
Up to 64 in total, 32 in and 32 out, through nine I²S/TDM input ports and nine output ports.
Is the SKY4680x available yet?
Engineering samples and evaluation boards are available now. Skyworks has not announced a price or a production date.
Where can engineers see the SKY4680x?
Skyworks is demonstrating it at electronica 2026 in Munich, in Hall C4, Booth 440.
Sources
- Skyworks' announcement of the SKY4680x audio DSP family: press release from Skyworks Solutions via GlobeNewswire, 10 November 2026.
- Consumer DRAM Shortages Extend to DDR2 Products with Contract Prices Expected to Continue Rising in 3Q26: TrendForce market research, 22 June 2026.
- Skyworks Automotive Audio DSP: the product family's page on Skyworks' website.
- electronica 2026: the trade fair's official site.