Actel Corporation: A Profile of the FPGA and Mixed-Signal Semiconductor Pioneer

Actel Corporation: A Profile of the FPGA and Mixed-Signal Semiconductor Pioneer

Actel Corporation was a semiconductor company known for designing field-programmable gate arrays, or FPGAs, and mixed-signal integrated circuits. Unlike the dominant SRAM-based FPGAs from competitors, Actel built its reputation on flash-based and anti-fuse non-volatile FPGA architectures that were valued for low power consumption, radiation tolerance, and immediate readiness on power-up. The company carved out a strong position in aerospace, defense, medical, and industrial markets before its acquisition by Microchip Technology in 2016. This profile covers Actel's history, its technology, its product lines, and its legacy in the semiconductor industry.

History and Corporate Timeline

Actel was founded in 1985 and headquartered in San Jose, California. The company went public in 1991 and over the following decades established itself as a specialist in non-volatile programmable logic. Its anti-fuse FPGAs and flash-based FPGAs became a reference point for designs where configuration memory could not be trusted or where immediate, deterministic start-up was required. In 2016, Microchip Technology completed its acquisition of Actel, integrating Actel's FPGA and mixed-signal products into Microchip's portfolio and extending Microchip's reach into the aerospace, defense, and industrial segments that Actel had long served.

FPGA Technology: Flash, Anti-Fuse, and SRAM Approaches

Actel's most distinctive engineering contribution was its use of non-volatile programming technologies in FPGAs. While many competitors relied on SRAM configuration cells that required an external memory device to reload the design at each power cycle, Actel's flash-based and anti-fuse FPGAs stored their configuration permanently or in non-volatile memory. This approach reduced component count, lowered static power, and improved tolerance to radiation, making Actel devices attractive for aerospace and medical applications where reliability and predictability were paramount. The company also offered SRAM-based FPGAs, but its non-volatile architectures defined its brand.

Product Portfolio and Market Segments

Actel's product portfolio spanned several families of FPGAs and mixed-signal devices. The ProASIC3 family, for example, was a flash-based FPGA line targeting industrial, medical, and consumer applications where low power and small footprint were critical. The IGLOO family was designed for low-power embedded applications, while the PolarFire family, introduced later, extended the company's reach into higher-performance markets with a flash-based FPGA that did not require configuration memory. Beyond FPGAs, Actel also supplied mixed-signal and analog products, including data converters and interface ICs, serving customers in medical imaging, industrial automation, and wireless infrastructure.

Legacy and Post-Acquisition Status

Since the Microchip Technology acquisition, the Actel brand has been folded into Microchip's product offerings. Microchip continues to sell and support former Actel FPGA families, and the non-volatile FPGA technology remains part of Microchip's portfolio. Engineers who previously relied on Actel devices can find compatible or updated parts within Microchip's broader catalog, and the legacy of Actel's focus on low-power, radiation-tolerant, and non-volatile programmable logic continues to influence product development in the embedded and aerospace markets.

Key Takeaways

• Actel Corporation was a semiconductor company specializing in FPGAs and mixed-signal ICs, known for non-volatile architectures.
• The company's anti-fuse and flash-based FPGAs were used in aerospace, defense, medical, and industrial applications.
• Actel was acquired by Microchip Technology in 2016, and its products are now part of Microchip's portfolio.
• Non-volatile FPGA technology from Actel remains relevant for designs requiring low power, radiation tolerance, and deterministic start-up.