On 28 August 2026, Microchip announced the Space CSAC-SA65, a radiation-tolerant chip-scale atomic clock for space systems. It tolerates at least 30 kRad total ionising dose, operates from −40°C to +80°C, consumes less than 120 mW, occupies less than 17 cm³, and provides 10 MHz and 1 PPS outputs. Its specified short-term stability is 3 × 10⁻¹⁰ Allan deviation at 1 second; part number 090-02789-007 is available for purchase.[1][8]
The device enables compact, low-power timing references for spacecraft and distributed lunar assets, including synchronisation, navigation, cross-linking, and operation without continuous GNSS access.[1][3] Its 30 kRad rating is useful but not sufficient evidence for exposed lunar deployment: the Ark must validate cumulative dose, solar-particle-event response, single-event effects, thermal cycling, vacuum operation, ageing, and long-duration frequency drift. Independent timing references could limit cascade failures in communications, power coordination, autonomous robotics, and archival data integrity.
The Ark team should obtain engineering samples and the CSAC Developer Kit, then qualify redundant SA65-based timing modules under representative lunar radiation, thermal-vacuum, vibration, and power conditions. Integrate at least two independently powered references into prototype time-distribution networks, compare them against higher-grade oscillators, and require holdover, drift, radiation-margin, and failure-recovery tests before adopting the component in habitat, navigation, or archive-control systems.[4]