Chennai startup Aheesa's 'Vihaan' broadband chip nails first-pass silicon on an Indian processor core

Getting a complex chip to work correctly the first time it comes back from the fab is one of the quieter bragging rights in the semiconductor world. It is called first-pass silicon success, and on Independence Day, 15 August 2026, the Ministry of Electronics and IT (MeitY) said an Indian startup had achieved it — on a chip built around a home-grown processor core.

The startup is Aheesa Digital Innovations, a Chennai-based fabless company, and the chip is Vihaan, a broadband networking System-on-Chip (SoC).

What was announced

Aheesa taped out Vihaan on Republic Day, 26 January 2026, and confirmed first-pass silicon success roughly seven months later, on Independence Day. First-pass success means the fabricated chip functioned as designed without requiring a costly, months-long respin — a marker of engineering maturity that many far larger design teams miss.

Vihaan is a broadband SoC aimed at high-throughput, secure connectivity: Fibre-to-the-Home (FTTH) deployments and broadband routers, the plumbing of India's fast-expanding fixed-broadband network. The project was supported under the government's Design Linked Incentive (DLI) Scheme, which offers financial support and incentives to Indian companies designing chips domestically.

Why the processor core matters

The detail that gives Vihaan its strategic weight is not just that it is Indian-designed, but what sits at its heart. The SoC is built on the open-standard RISC-V architecture and incorporates the indigenous 64-bit VEGA processor core developed by the Centre for Development of Advanced Computing (C-DAC).

That combination matters. RISC-V is a royalty-free instruction-set architecture, which frees Indian designers from licensing the proprietary cores that dominate global chips. VEGA is India's own processor family. Putting a VEGA core inside a commercial-grade broadband chip — and having that chip work on the first try — is a real-world proof point that the indigenous core is not merely an academic exercise but something you can build a shippable product around.

From lab to production line

Vihaan is not finished. First-pass silicon validates the design; the next milestone is production tape-out, targeted for 2027, the point at which the chip is committed to volume manufacturing. Aheesa has not disclosed detailed performance figures, and independent benchmarking against established commercial broadband silicon will come later.

But the trajectory fits a pattern India has been trying to establish across its semiconductor mission: pair indigenous design talent with domestic IP (like VEGA and RISC-V), de-risk it with schemes such as DLI, and push it toward products that substitute for imports in strategically sensitive areas. Telecom and broadband silicon — chips that sit inside the national communications backbone — is exactly the kind of area where a home-grown, auditable design carries value beyond cost.

The bigger picture

The announcement lands in a busy stretch for Indian chips. Three assembly-and-test plants — Micron, Kaynes and CG Semi — are now packaging commercial chips in Sanand, and on the same Independence Day, the Prime Minister said India would add several more semiconductor plants over the next several years under the ₹1.27-lakh-crore Semicon 2.0 programme, which explicitly widens the country's focus to design, equipment and materials.

Against that backdrop, Vihaan is a design-side counterpart to the manufacturing headlines: a small Chennai team showing that India can not only assemble and test chips, but design a working one around its own processor core. First-pass silicon on a VEGA-based broadband SoC won't grab the attention of a multi-billion-dollar fab announcement — but in the long arithmetic of self-reliance, it may matter just as much.

Sources

• ANI News — "DLI-backed Indian chip startup achieves first-pass silicon success with broadband chip VIHAAN: MeitY" (15 August 2026): https://aninews.in/news/business/dli-backed-indian-chip-startup-achieves-first-pass-silicon-success-with-broadband-chip-vihaan-meity20260815185419/
• The Tribune — "DLI-backed Indian chip startup achieves first-pass silicon success with broadband chip VIHAAN: MeitY": https://www.tribuneindia.com/news/broadband-networking/dli-backed-indian-chip-startup-achieves-first-pass-silicon-success-with-broadband-chip-vihaan-meity
• IndianWeb2 — "VIHAAN: India's Homegrown Broadband Chip Tapes Out for 2027 Production": https://www.indianweb2.com/2026/08/vihaan-indias-homegrown-broadband-chip.html