Abstract: As a new network technology that can provide high-bandwidth, high-deterministic transmission services, time sensitive networking (TSN) has received extensive attention and research from academia and industry in recent years. However, most domestic TSN devices currently use foreign TSN chips or hardware IP. There is no autonomous TSN chip available for network upgrading of core equipment. To this end, the OpenTSN team has developed a low-power TSN chip HX-DS09 for networks in high-end equipment. The chip can provide sub-microsecond synchronization accuracy, single-hop data transmission delay and jitter. HX-DS09 can work under endpoint, switching and switching endpoint mode, and its power consumption is less than 0.5W. It can satisfy the diversified deterministic networking needs of high-end equipment.