HX31 Seam-Sealed Crystal Clock Oscillator Diodes Incorporated HX31 3.2 x 2.5mm Seam-Sealed Crystal Clock Oscillators feature nominal frequencies of 24.545452 to 33MHz and frequency stability of ±25 to ±50ppm. Supply voltage is 2.8 or 3.3V and supply current is 20mA maximum (output enabled) or 100µA (output disabled). HX31 has an operating temperature range of -40°C to +105°C.