The ST64UWB family of ultra-wideband SoCs from ST provides increased range and processing capability for automotive applications. Backward compatible with IEEE 802.15.4z, the chips also support the emerging IEEE 802.15.4ab UWB standard, enabling device localization and tracking at distances of several hundred meters. Target use cases include hands-free digital keys and high-accuracy vehicle localization.
Enhancements such as multi-millisecond ranging (MMS) and narrow-band assistance (NBA) provide greater operating range and improve link robustness, particularly for devices carried in bags or rear pockets. These features also facilitate close-range direction finding for more accurate interpretation of user position and movement. In addition, IEEE 802.15.4ab strengthens radar mode for more reliable in-vehicle child presence detection.
The ST64UWAB-A100 and ST64UWB-A500 are built on an 18-nm FD-SOI process, increasing link budget by nearly 3 dB versus bulk technologies and boosting range by up to ~50% beyond IEEE 802.15.4ab. Both devices integrate an Arm Cortex-M85 core, while the ST64UWB-A500 adds AI acceleration and DSP capabilities for edge AI-based radar applications. A third device, the ST64UWB-C100, expands the lineup to cover industrial and consumer applications.
The devices are now sampling to leading Tier 1 suppliers and OEMs.