The OX–070 is a high stability ovenized crystal oscillator in a miniature atomic clock compatible footprint, capable of aging rates of 0.06 ppb/day and temperature stabilities of 1ppb over the industrial temperature range. Driven by an SC–cut crystal, the OX–070 has twice the temperature range, similar aging and temperature performance of the miniature atomic clocks. It also has better Allan Deviation and phase noise than commercially available miniature atomic clocks, at a tenth of the cost.