STMicroelectronics’ ST64UWB series, featuring the Arm Cortex-M85 UWB SoC family, supports both current IEEE 802.15.4z and upcoming IEEE 802.15.4ab UWB standards for enhanced range, reliability, and secure interactions. Tailored for digital car keys, hands-free access, and smart-device recognition, the series features ST64UWB-A100 (automotive entry), ST64UWB-A500 (automotive premium), and ST64UWB-C100 (industrial/smart home), all constructed using an 18 nm FD-SOI process, which bolsters the RF link budget by approximately 3 dB—extending range by about 50% beyond the capability of IEEE 802.15.4ab alone. The A-series models support ASIL-A(B) safety features, while the C100 focuses on consumer and commercial use.
ST64UWB series specifications include:
– MCU Core: 32-bit Arm Cortex-M85 CPU with DP-FPU, MVE, and ETM.
– Frequency: Up to 100 MHz for ST64UWB-C100 and A100, and up to 256 MHz for A500.
– Memory/Storage: Integrated PCM Memory, SRAM, and Back-up SRAM.
– Wireless Connectivity: UWB Radio, IEEE 802.15.4z-2020, IEEE 802.15.4ab, various UWB channel supports, and NBA Radio; automotive standards CCC, ICCE.
– Radar sensing (A500 only): Features like multi-target detection, distance/angle measurement, and child presence detection.
– Peripherals: I/O ports, communication interfaces, FDCAN (A500/A100), and more.
– Security: Arm TrustZone, secure enclave, tamper detection, PSA, and SESIP Level 3.
– Clock Sources: Includes external/internal options.
– Other Features: Integrated temperature sensor and on-chip debugging.
– Power: Internal power management.
– Packaging: HWQFN40, ECOPACK 2 compliant.
– Temperature Range: (-40°C to +115°C for A500/A100, junction +125°C).
– Compliance: AEC-Q100 grade 2 qualified, ISO21434, and ISO26262 standards.
The radar system on A500 benefits from IEEE 802.15.4ab’s Kaiser pulse shape and the 1.3 GHz bandwidth of UWB channel 11, improving spatial accuracy twofold compared to traditional 500 MHz channels. IEEE 802.15.4ab also includes narrow-band assisted ranging, boosting the link budget by up to 18 dB and extending secure ranging distance. The ST64UWB supports a UWB stack, radar-processing tools, and integrates with ecosystems like CCC Digital Key and ICCE.
Devices are currently sampling with suppliers, pending official pricing. Additional information is available on the press release and product page.