The Six Semi is actively developing high-performance memory PHYs in various technology nodes.  

 

TSS PHY Foundry Tech Node Availability Silicon Proven
GDDR6 PHY TSMC N12 FFC Now Yes
LPDDR54 PHY Samsung Foundry 14LPP/LPU Now Q3 2021
LPDDR54 PHY TSMC N12 FFC Now Q4 2021
HBM3 PHY TBD Q2 2022 Q2 2022