IC clocks are semiconductor integrated circuits (ICs) that are designed to keep time. IC clocks are important components in virtually all electronic components. They maintain synchronization and timing control in telecommunications applications, consumer electronics, wireless handhelds, and global positioning systems (GPS). IC clocks may be part of a printed circuit board (PCB) that uses a number of these components. IC clocks can also be used when an input reference clock fails to operate properly. The intergrated circuit continues to maintain an accurate clock until the failure of the reference clock is stabilized.