SA.45s Chip ccale atomic clock (CSAC)

The SA.45s Chip Scale Atomic Clock (CSAC) is the world’s first commercially available chip scale atomic clock, enabling a new class of atomic clock applications, defined by portability.

Chip scale atomic clock, CSAC, Microsemi

Microchip (Microsemi, Symmetricom) invented portable atomic timekeeping 
with QUANTUM™, a family of atomic oscillators that offers best-in-class stability, size, weight, and power consumption, making them suitable for a variety of applications ranging from telecom networks to aerospace & defense.

The Microchip SA.45s CSAC is the world's first commercially available chip-scale atomic clock, providing the accuracy and stability of atomic clock technology while achieving true breakthroughs in reduced size, weight, and power consumption.

SA.45s CSAC 

An unmatched combination of breakthroughs — in reduced size, weight, and power consumption — brings the accuracy and stability of atomic clocks to portable applications.