1.6×1.2mm GT-cut quartz crystals cover the 8 to 20 MHz range
The width-extensional mode of GT-cut quartz crystal units allows a package design unconstrained by blank size, in turn enabling significantly smaller and lower-profile units operating at lower MHz frequencies.
These characteristics are difficult to achieve with traditional AT-cut quartz crystal units, claims the manufacturer. The equivalent circuit constants of GT-cut quartz crystal units are comparable to those of AT-cut units. The devices are very stable to ±3 ppm in the range of -20 to +70°C and ±5ppm in the range of −40 to +85°C, they minimize vibration loss and ensure stable oscillation, even when driven at 5μW or less.
Compared to traditional compact AT-cut quartz crystal units, GT-cut units achieve starting oscillation time approximately twice as fast, 550μs (compared to 12MHz FCX-05 in the same oscillation circuit and at the same frequency). GT-cut crystals are air-sealed with metal lids welded onto a ceramic package using a proprietary ebeam sealing technique.
Visit River Electronics at www.river-ele.co.jp
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