Oscillators Time Optical NICs

Optimized for optical network interface cards (NICs), the SEL381x series crystal clock oscillators are available in frequencies from 25 to 670 MHz. They come in an industry-standard, leadless, 5 x 7-mm ceramic package, and employ an AT-cut quartz crystal bulk-wave resonator, which is said to make possible the broad frequency range. Frequency stability is ±20 ppm from 0°C to 70°C and ±50 ppm from -40°C to 85°C with phase jitter not exceeding 3 ps. The oscillators support 3.3V LVPECL operation with a typical current consumption of 85 mA, and their differential outputs maintain a 45%/55% waveform symmetry. As an option, the output can be disabled for testing via one of the component's six, gold-plated contact pads. Prices start at $10 each/1,000. SARONIX, Menlo Park, CA. (800) 227-8974.