SiT1532 TempFlatTM MEMS technology and extremely low power CMOS analog circuit design provide a highly stable 32.768 kHz clock signal with <1µA of operating current. The frequency stability of SiT1532 is specified in two key parameters: (1) Initial Stability and (2) Frequency Stability over Temperature. Initial Stability is a room temperature specification of frequency offset in PPM (10-6) with respect to nominal oscillation frequency 32.768 kHz. This includes solder-down shift and is measured over defined supply voltage range at room temperature. Frequency Stability over Temperature specification in SiT1532 datasheets includes the frequency shift due to change in environmental temperature in addition to all the variable components accounted in the initial stability.
