Path: EDN Asia >> Product Centre >> IC/Board/Systems Design >> River Eletec introduces GT-cut quartz crystals for 8Mhz-20MHz
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River Eletec introduces GT-cut quartz crystals for 8Mhz-20MHz

11 Mar 2014  | Julien Happich

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Measuring only 1.6mm × 1.2mm × 0.33mm, the GT-cut quartz crystal units by River Eletec cover the 8MHz to 20MHz frequency 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 ±3ppm in the range of -20°C to +70°C and ±5ppm in the range of ?40°C to +85°C, they minimise 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.

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