The LMK04011BISQ/NOPB is a clock conditioner with an integrated PLL that accepts LVCMOS, LVDS, or LVPECL inputs and delivers 2VPECL or LVPECL outputs at up to 1.57 GHz. That frequency ceiling makes it a candidate for cleaning up reference clocks feeding high-speed ADCs, DACs, or SerDes transceivers in base-station, test-and-measurement, or networking gear. The 2:5 input-to-output ratio means you can take one reference and distribute five conditioned copies — useful for fanning a clean clock across multiple converter channels or FPGA banks without adding separate PLLs per lane.
The 1.57 GHz maximum frequency sets the upper bound for the output clock rate. If your ADC sample clock or SerDes reference is below that, this part can condition it; if you need 2.5 GHz, you need a different part. Supply voltage is 3.15 V to 3.45 V — a tight 3.3 V rail with ±5 % tolerance. A noisy or droopy 3.3 V supply will degrade the jitter-cleaning performance, so plan for a dedicated LDO feeding this IC.
The base product number is LMK04011; the BISQ suffix indicates the industrial temperature range and the 48-WQFN package. The /NOPB suffix confirms lead-free (RoHS) construction.