Low-Voltage PECL Clocks Deliver Frequencies From 77 To 330 MHz

Available in crystal oscillator (CCPD-033/034) and voltage-controlled crystal-oscillator (CVPD-034) configurations, a series of low-voltage PECL clock generators offers clock frequencies ranging from 77 to 330 MHz. The outputs, which are 3.3-V differential signals, have less than 0.5 ps rms of jitter from 12 kHz to 20 MHz. The signals also feature a low phase noise (−145 dBc/Hz at 100 kHz) with no phase-locked-loop multiplication. Clock versions have a stability of ±20 to ±100 ppm. The CCPD-033/034 and CVPD-034 are available in standard 5- by 7-mm SMD packages and can be ordered on 16-mm tape and reel in quantities of 100, 500, and 1000 units. Versions with an extended operating temperature range of −40°C to 85°C and other custom specifications are available. Prices for the clocks and VCXOs start at $4.33 apiece in production volumes.