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Publication Date: 02/1/2010
Archive >  February 2010 Issue >  New Products > 

Epson Toyocom Intros Hi-Accuracy TCXO
Crystal oscillator.
El Segundo, CA — Epson Toyocom has developed a highly accurate new TCXO (temperature-compensated crystal oscillator) that has an OCXO-class frequency/temperature coefficient of ±0.1 x 10-6, enabling power and space saving in telecom network equipment.

Reference clocks used in ultra-compact cellular base stations for home and office use require high accuracy, with a frequency/temperature coefficient of ±0.1 x 10-6 or better. Core telecom network equipment, meanwhile, requires stability of ±4.6 x 10-6 over a period of 20 years. Obtaining this class of frequency tolerance/stability normally requires the use of a highly stable oscillator in the OCXO (oven-controlled crystal oscillator) or atomic oscillator classes. The new 7.0 x 5.0mm TG-5500CA, in addition to being equipped with a QMEMS (QuartzMEMS) crystal unit, has an original structural design that takes into account thermal conductivity and stabilizes the frequency/temperature coefficient and long-term aging


In addition, frequency-stability characteristics that affect the quality of transmissions, such as temperature tracking and frequency fluctuation, have also been dramatically improved compared to the company's conventional 7.0 x 5.0mm TCXOs.

The TCXO is now easily used in applications that were formerly reserved for OCXO-range devices. Using a TCXO instead of an OCXO can significantly help reduce the power consumption and the ultimate size of systems.

The TG-5500CA can also be used to improve the performance and function of systems that employ an existing TCXO, but it is especially well-suited for use in core telecom network equipment, such as femtocell base stations and Stratum 3 products.

Contact: Epson Electronics America, Inc., 2580 Orchard Parkway, San Jose, CA 95131 800-228-3964 fax: 408-922-0238 Web: or

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