STMicroelectronics Propels New Era of UWB Tech for Automotive and Smart Device Applications

Why It Matters

The new chips give car makers and device makers a scalable path to ultra‑wideband solutions that combine longer range, AI‑enabled radar and backward compatibility, accelerating market adoption and unlocking new revenue streams.

Key Takeaways

• ST64UWB supports IEEE 802.15.4ab, extending UWB range
• Up to 50% longer range via 18 nm FD‑SOI process
• Automotive chips include Cortex‑M85 core and ASIL A/B safety
• AI‑accelerated A500 enables edge radar and child‑presence detection
• Backward compatible with 802.15.4z, easing OEM transition

Pulse Analysis

Ultra‑wideband (UWB) is moving from niche localization to a core automotive and consumer technology, and STMicroelectronics’ ST64UWB family is a catalyst for that shift. By leveraging an 18 nm fully‑depleted silicon‑on‑insulator (FD‑SOI) process, the chips achieve a near‑3 dB link‑budget gain, translating into roughly a 50 percent increase in operational range. The integration of a Cortex‑M85 core and dedicated AI acceleration in the A500 variant also positions the family to handle edge‑AI radar workloads, such as child‑presence detection, without external processors. This hardware efficiency reduces BOM costs and simplifies system design for Tier‑1 suppliers.

For the automotive sector, the extended range and robust non‑line‑of‑sight performance directly address the long‑standing back‑pocket problem of digital key fobs. With IEEE 802.15.4ab’s multi‑millisecond ranging and narrowband assistance, vehicles can reliably detect a key in a bag or rear pocket, enabling seamless hands‑free entry and precise vehicle localization for advanced driver‑assistance systems. The ASIL A/B safety certification of the A‑series chips further assures OEMs that the technology meets stringent functional‑safety standards, accelerating integration into next‑generation car access architectures.

Beyond cars, the ST64UWB C100 targets consumer electronics, offering best‑in‑class tap‑free interactions while maintaining compatibility with the existing 802.15.4z ecosystem. This backward compatibility eases the transition for smartphone manufacturers, who can roll out enhanced UWB features without abandoning legacy devices. As the IEEE 802.15.4ab standard gains traction, analysts project hundreds of millions of UWB‑enabled smartphones by 2030, creating a massive addressable market for smart locks, wearables, and IoT sensors. ST’s comprehensive development kit—complete with stack, radar toolbox, and reference designs—lowers the barrier for innovators, positioning the company as a pivotal enabler of the next UWB wave.