CRYSTAL 20MHZ 18PF HC-49US; Frequency Nom:20MHz; Crystal Case:Through Hole 11.05mm x 4.65mm; Frequency Stability + / -:30ppm; Load Capacitance:18pF; Frequency Tolerance + / -:20ppm; Product Range:QCL Series; Operating Temperature Min:-40°C; Operating Temperature Max:85°C; MSL:MSL 1 - Unlimited