Miniature LVPECL/LVDS VCXOs
Packaged in 3.2- x 2.5-mm industry standard 6-pad ceramic package, with a hermetically sealed metal lid to reduce EMI radiation, the IQXV-80 offers an LVPECL output while the IQXV-81 offers LVDS. Low-voltage positive emitter-coupled logic (LVPECL) outputs are typically chosen for their compatibility with high-speed ICs whilst low voltage differential signalling (LVDS) is similar but with lower power consumption.
Intended for applications such as 10G and 40G Ethernet, SDH/SONET, WiMax, WLAN and digital imaging, both models are available in a wide frequency range from 40 to 170 MHz.
Both series operate from a 3.3 V power source and are available with stabilities of ±25ppm or ±50ppm over an operating temperature range of -40 to 85 °C. In either case the frequency can be adjusted externally by the application of a control voltage (1.65 V ±1.5 V) which can pull the output frequency by a minimum of ±80ppm. This allows for absolute frequency adjustment and a correction for crystal ageing.
Both variants offer tri-state capability which can aid the testing and isolation of the circuit during alignment and upgrading. Phase jitter is extremely low for devices of this nature at less than 1ps RMS (12 kHz to 20 MHz). The IQXV-80 and IQXV-81 are available in bulk pack for prototyping and tape and reel for volume production.
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