The 3QHM572C2.0-19.440 from Mercury Electronics Ind. is surface mount crystal oscillator (SSXO type) with 19.44 MHz frequency and ±50ppm frequency stability. This oscillator has enable/disable function, CMOS (Low EMI) output and 3.3V supply. The 3QHM572C2.0-19.440 comes in 4-SMD, no lead package with dimensions: 0.276 L x 0.197" W x 0.055" H (7.00mm x 5.00mm x 1.40mm). Operating temperature range is from -45°C to 85°C."