F1100ELF-250, Crystal Oscillator, 25 MHz, 100ppm TTL, 4-Pin PDIP, 20.8 x 13.2 x 5.08mm

F1100ELF-500, Crystal Oscillator, 50 MHz, 100ppm TTL, 4-Pin PDIP, 20.8 x 13.2 x 5.08mm

F1100ELF-018, Crystal Oscillator, 1.843 MHz, 100ppm TTL, 4-Pin PDIP, 20.8 x 13.2 x 5.08mm