3:11 fanout buffer with multiplexer — what the ratio buys
The 8T39S11ANLGI is a 3:11 fanout buffer with an integrated multiplexer — three input sources (HCSL, HSTL, LVDS, LVPECL, or a crystal) are selectable, and the selected clock is fanned out to eleven differential outputs (HCSL, LVDS, or LVPECL). The 3:11 ratio is the key parametric: it replaces a separate mux plus a multi-output fanout tree, saving board space and reducing additive jitter from cascaded buffers. The 2 GHz max frequency covers PCIe Gen4/5 reference clocks, 10GbE, Fibre Channel, and 100G backplane distributions. The differential input and output path keeps signal integrity clean across the fanout tree — single-ended clocking would limit reach and noise margin at these speeds.
Supply range and temperature grade — board-level fit
Supply voltage spans 2.375 V to 3.465 V, covering both 2.5 V and 3.3 V rails without an extra regulator.
Active production — no obsolescence pressure
The BOM line can be committed without an obsolescence risk flag — sourced per RFQ against the required quantity.