Found 4 alternatives for LMX2581SQ/NOPB by Texas Instruments. Clock Timing Clock Generators Plls Frequency Synthesizers — 32-WFQFN Exposed Pad.
IC RF FREQ SYNTHESIZER 32WQFN
IC CLOCK GENERATOR 32TQFN
IC CLOCK GENERATOR 32TQFN
IC RF FREQ SYNTHESIZER 32WQFN