THine unveils DSP-free PCIe6 VCSEL driver and TIA for AI optics

THine has introduced two optical semiconductor components—a VCSEL driver and a transimpedance amplifier (TIA)—built around its “ZERO EYE SKEW®” circuit technology to target ultra-low-latency, lower-power optical interconnects for AI scale-up networks. The company says the approach removes optical DSPs from interconnect lanes while maintaining eye opening and signal quality, a design choice aimed at reducing both latency and power for high-speed links between GPUs and memory.

The new parts are the THLD6481, a 64 Gbps VCSEL (Vertical-Cavity Surface-Emitting Laser) driver, and the THTA6482, a 64 Gbps TIA for PCI Express 6. THine also states the devices are designed to support VCSEL and photodiode (PD) arrays, a practical requirement for higher-density optical modules where lane count and packaging quickly become the constraint.

THine’s core technical claim is that its ZERO EYE SKEW® technology enables “DSP-free” optical links by using proprietary circuit techniques to achieve appropriate eye pattern opening and signal quality without an optical DSP in the lane. Cutting out a DSP can simplify the optics lane budget and reduce added latency, but it also puts a lot of pressure on the analog front end and channel design to hold margins at higher speeds.

On the roadmap side, THine is developing PCIe7 (128 Gbps/lane) “DSP-free EICs,” with sample plans in 2027. For that PCIe7 work, THine claims a 90% latency reduction and a 73% power reduction compared to DSP-based optical interconnects.

THine also notes that development is supported in part by a grant program (JPJ012368G70601) administered by Japan’s National Institute of Information and Communications Technology (NICT).

“Our proprietary ZERO EYE SKEW® technology eliminates the need for DSPs within optical interconnects,” said Yasuhiro Takada, chief strategy officer at THine, adding that the company has “initiated product planning for driver and TIA solutions targeting optical interconnects for UCIe retimers.”

THine plans to show the THLD6481 and THTA6482 at ECOC 2026 in Málaga, Spain.