Logic, Timing Solutions, Clocks, HEF4541BT,518, Nexperia

 Timing device from any manufacturer including FOX, Citizen, Abracon, CTS, AVX, Murata, IQD, Hosonic, Raltron, Saronix, TDK, Vishay and Aker. Crystal, Oscillator & Resonator timing devices. Several timing device manufacturers.

https://www.futureelectronics.com/c/semiconductors/logic--timing-solutions--clocks/products