S21805-16.000-X, Crystal Oscillator, 16 MHz, 50ppm CMOS 15pF, 4-Pin SMD, 2.5 x 2.0 x 0.95mm
S21805-8.000-X, Crystal Oscillator, 8 MHz, 50ppm CMOS 15pF, 4-Pin SMD, 2.5 x 2.0 x 0.95mm