The SY85B5-X1ATZZ(WT) transceiver from OMC Tech is a small-form-factor pluggable (SFP) module for serial optical data communications, such as IEEE 802.3cc 25GBASE-SR/SW. It features the SFP28 and SFP+ 20-pin connectors, allowing for hot plug capability. Digital diagnostic functions are available via an I2C. This module is designed for multi-mode fiber (MMF) and operates at a nominal wavelength of 850nm.
Transmitter Section
The transmitter consists of a high-performance 850 nm Vertical Cavity Surface Emitting Laser(VCSEL)in the optical subassembly (OSA), which is housed within a plastic barrel package. In addition, this component is also a class 1 laser that is compliant with International Safety Standard IEC-60825-1:2014. It complies with EN60825-1:2014/A11:2021 and FDA 21 CFR 1040.10 and 1040.11.
Receiver Section
The receiver consists of a GaAs PIN photodiode that is coupled to a high-sensitivity transimpedance amplifier (TIA) in an OSA. This OSA combination is mated to a post-amplifier IC that provides the post-amplification SD (Signal Detection) or LOS (Loss of Signal) indication circuit, which provides the logic high state output when an unusable input optical signal level is detected.