- STMicroelectronics launches ST64UWB SoCs with extended range and improved accuracy using IEEE 802.15.4ab.
- New chips enable advanced automotive digital key, radar sensing, and consumer UWB applications.
STMicroelectronics has unveiled its ST64UWB family, a new generation of ultra-wideband system-on-chip devices designed to support the latest IEEE 802.15.4ab wireless standard. These chips enable precise localisation and tracking over distances reaching several hundred metres. The company has already begun sampling the devices to major Tier 1 suppliers and OEMs, signalling readiness for large-scale adoption across automotive, industrial, and consumer ecosystems.
Advanced UWB Architecture with Extended Range Capabilities
The ST64UWB series includes three variants—ST64UWB-A100, ST64UWB-A500, and ST64UWB-C100—built using an advanced 18 nm FD-SOI process. This architecture enhances the link budget by nearly 3 dB compared to conventional bulk technologies, translating into approximately 50% additional range beyond standard IEEE 802.15.4ab capabilities. The standard introduces multi-millisecond ranging and narrowband assistance, which significantly improve signal reliability, especially in non-line-of-sight scenarios such as devices placed in pockets or bags.
Chip Variants and Automotive Use Case Expansion
The ST64UWB-A100 is tailored specifically for automotive applications such as digital key systems and vehicle localisation, integrating an Arm Cortex-M85 core with ASIL A(B) safety compliance. Meanwhile, the ST64UWB-A500 extends functionality by incorporating AI acceleration and digital signal processing, enabling radar-based features like child presence detection, kick sensing, and parking assistance. The ST64UWB-C100 is optimised for commercial and consumer use, offering compatibility with the Aliro standard to support broader ecosystem integration.
ST64UWB Chip Comparison Overview
| Chip Variant | Primary Application |
|---|---|
| ST64UWB-A100 | Automotive digital key and localisation |
| ST64UWB-A500 | Radar sensing with AI acceleration |
| ST64UWB-C100 | Consumer and commercial applications |
Industry Support and Ecosystem Readiness
Industry leaders including Forvia Hella, LG Innotek, Marquardt, and Nuki Home Solutions have endorsed the platform, highlighting its significantly extended range and backward compatibility with IEEE 802.15.4z. The new standard delivers more than eight times the range of its predecessor, improving usability in obstructed conditions such as when a smartphone or key fob is carried in a rear pocket.
Performance Enhancements and Market Outlook
The IEEE 802.15.4ab standard leverages a 1.3 GHz bandwidth and advanced pulse shaping techniques to deliver double the accuracy compared to traditional 500 MHz channels. According to industry insights, this standard is expected to dominate future ultra-wideband deployments, especially in automotive applications where seamless digital key systems and precise localisation are critical. Backward compatibility ensures a smooth transition, allowing existing infrastructures to upgrade without disruption.
Development Ecosystem and Deployment Support
STMicroelectronics is also providing a comprehensive development kit alongside the new chips. This includes a full UWB software stack covering PHY and MAC layers, radar toolkits, development boards, antenna reference designs, and application examples. These resources are intended to accelerate integration across automotive and consumer markets, enabling developers to quickly deploy next-generation ultra-wideband solutions.
Frequently Asked Questions
What makes the ST64UWB chips significant for automotive applications?
The ST64UWB chips enable highly precise localisation, extended range communication, and enhanced reliability for automotive use cases like digital keys and radar sensing. These capabilities improve vehicle access systems and safety features while maintaining compatibility with existing UWB ecosystems. With support for IEEE 802.15.4ab, these chips also allow seamless integration with smartphones and reduce system complexity, making them a key enabler for future connected vehicle technologies.
How does IEEE 802.15.4ab improve ultra-wideband performance?
IEEE 802.15.4ab enhances ultra-wideband performance by introducing multi-millisecond ranging, narrowband assistance, and increased bandwidth for improved accuracy. These advancements significantly extend communication range and improve performance in non-line-of-sight conditions. The standard also ensures backward compatibility with IEEE 802.15.4z, allowing industries to upgrade systems without replacing existing infrastructure while unlocking new applications across automotive, consumer, and industrial sectors.
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