3.1 GHz fanout buffer with protocol translation
The LMK00304SQE/NOPB is a Texas Instruments fanout buffer that also integrates a multiplexer and level translator in one 32-WQFN package. It accepts up to three input sources — CML, HCSL, HSTL, LVDS, LVPECL, SSTL, or a crystal — and distributes the selected clock to five outputs in HCSL, LVCMOS, LVDS, or LVPECL format. The 3.1 GHz maximum frequency covers PCIe Gen4/5 reference clocks, 100G Ethernet, and high-speed ADC/DAC sampling clocks. At this speed, the differential input-to-output path (Yes/Yes per the spec) preserves signal integrity without external level shifting.
The part operates from a 3.15V to 3.45V supply — a narrow rail typical of high-performance clocking ICs that need tight PLL/VCO noise margins.
Active lifecycle — no end-of-life risk
Because it is an active TI catalog part, it is sourced through authorized distribution channels.