Q-Tech Corp. has introduced the QTCC578 Series of ultra-miniature crystal oscillators, touting exceptional phase noise floor of -155 dBc/Hz for high-performance, low-voltage applications. These include telecom applications such as fiber channel, telecom, SONET, Ethernet/SynchE and microprocessor clock to military/aerospace applications such as navigation, avionics, and commercial off-the-shelf (COTS).
The QTCC578 oscillators are built using a miniature strip AT quartz crystal in a low-profile ceramic (5 x 7 x 1.5 mm) hermetically-sealed package with gold-plated contact pads. They provide supply voltages of 3.3 VDC and 2.5 VDC.
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These LVDS logic differential output crystal oscillators are available with frequency set to between 100.000 MHz and 250.000 MHz, with temperature range/frequency stability selectable from ±25 ppm at -40°C to 85°C to ±100ppm at -55°C to+125°C.
The QTCC578 oscillators are EAR99-classified. They are lead-free and RoHS compliant. Military screening per MIL-PRF-55310 is available.
Available now, lead times for the QTCC578 devices is about eight weeks without the optional MIL-PRF-55310 screening. Many standard frequencies are in stock. Pricing depends on the package, frequency, and screening level.
Q-Tech also recently introduced the QT723 and QT735 Series of space-qualified crystal oscillators, claiming the industry’s smallest surface-mount packages. The QT723 Series, measuring 2.5 x 3.2 mm, offers user-prescribed frequencies of 1.500 to 250 MHz, tri-state CMOS outputs powered by an input voltage of 1.8, 2.5 or 3.3 VDC. The QT735 Series, in a 3.2 x 5.0 mm package, is offered in CMOS, LVDS and LVPECL versions with input voltages up to 5.0 Vdc and selectable frequencies from 1.000 to 250 MHz. The new space, low-earth orbit oscillators are kRad(Si) total dose ionization radiation hardened, high shock (20,000 g) resistant, and screened per MIL-PRF-55310, Level B with PIND.
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