Designed for surface-mount applications, FSP is a ultra-miniature tuning fork watch crystal packaged in a plastic housing that has a profile only 2 mm high, making it well-suited for timing applications where space is at a premium, such as portable designs. The device operates at the standard watch crystal frequency of 32.768 kHz and has a frequency range of ±20 ppm at 25°C; a frequency stability of -0.04 ppm; and an insulation resistance of 500 Megaohms at 100 vdc.