Crystal 16MHz A 20ppm 18pF 25 Ohms HC-49/U Specifications Type: MHz Crystal Frequency: 16 MHz ESR (Equivalent Series Resistance): 25 Ohms Frequency Stability: A 100 ppm Frequency Tolerance: A 20 ppm Load Capacitance: 18 pF Operating Mode: Fundamental Operating Temperature: -10C to 70C Mounting Type: Through Hole Package: HC-49/U Size: 0.453" L x 0.197" W (11.50 mm x 5 mm) Height - Seated (Max): 0.530" (13.46 mm)