100K-series buffer – what this part is
The 100122FC is a buffer from the 100K series, a family of emitter-coupled logic (ECL) devices known for high-speed operation. As a buffer, its role is to fan out a logic signal without degrading rise times or drive capability, typically used in clock distribution or signal conditioning within high-frequency digital systems.
It is listed as RoHS non-compliant, so designs that require lead-free assembly will need to evaluate whether this part meets exemption criteria or if a lead-free alternate is necessary.
Sourcing posture
This part is, not tape-and-reel, which is typical for through-hole or larger package formats.