[Pete] wondered how real-time clock modules could be selling on eBay for $1.50 when the main component, the Maxim DS3231 RTC/TCXO chip, cost him more like $4 apiece. Could the cheap modules ...

A low-noise chip-scale atomic clock (LN-CSAC), the SA65-LN from Microchip, features a profile height of less than 0.5 in. (12 ...

Microchip Technology has introduced its second-generation Low-Noise Chip-Scale ... an atomic clock in a single device, offering a low-phase noise of 10 Hz < −120 dBc/Hz, an Allan Deviation (ADEV) ...

a real-time clock, and the driver chip for the tube segments. The tube itself lives on a clever riser card that elevates the display above the main PCB and puts it at the proper angle for reading.