High-Stability VC-TCXO for 3G Mobile Phones

ASIA Japan : Epson Toyocom has begun shipping samples of its TCO-5890 Series of VC-TCXO, a voltage-controlled temperature compensated crystal oscillator that incorporates in the world's smallest class of package all previous features. Above shows the new product alongside a grain of rice.

The new products operate with high precision while meeting the ongoing demand for miniaturization in mobile phones and other devices, making them easy to incorporate into a wide range of applications.

Today's increasingly feature-rich mobile phones and other communication devices are adding a growing array of functions, including built-in GPS functions that are more accurate than ever. To meet the requirements of such applications, a VC-TCXO must be both compact and frequency-stable.

Equipped with a precision-processed crystal unit, the TCO-5890 Series offers the same outstanding precision and stability as earlier products (such as TCO-5870 Series products in 3.2 x 2.5 mm packages) yet in a new, smaller package (2.5 x 2.0 x 0.9 mm) that fits easily into devices such as mobile phones. In addition, these environmentally conscious products are lead-free.

Main Features of the TCO-5890 Series

Compact and lightweight
Dimensions: 2.5 x 2.0 x 0.9 mm, weight: 17 mg
The products in the TCO-5890 Series are 37% smaller and 50% lighter than Epson Toyocom's TCO-5870 series products (TCO-5870 series dimensions: 3.2 x 2.5 x 0.9 mm, weight: 35mg).
Superb short-term frequency stability (*1)
Low power consumption
Power supply voltage: +2.8 V ±5% (+2.3 V min)
(TCO-5870 series: +2.4 V min.)
Glossary

*1. Short-term frequency stability: random fluctuation in output frequency within a short time cycle. Parameter TCO-5890 Series TCO-5870 Series (Previous products)
Outline dimensions 2.5 x 2.0 x 0.9 mm 3.2 x 2.5 x 0.9 mm
Cubic volume 4.5 mm3 7.2 mm3
Weight 17 mg 35 mg
Power supply voltage +2.3 V min +2.4 V min

Main specifications

Parameter Specification Remark
Supply voltage (V) 2.8 ±5%
Output frequency range (MHz) 10 to 40
Operation temperature range (°C) -30 to +85
Storage temperature range (°C) -40 to +90
Frequency tolerance (x10-6) ±2.0 (MAX) Reflow two times after
Frequency/temperature coefficient (x10-6) ±2.0 (MAX) Operation temperature range (-30°C to +85°C)
Frequency aging (x10-6/year) ±1.0 (MAX)
Output level (Vp-p) 0.8 (MIN) 10 kO//10 pF (DC superposed)
Current consumption (mA) 2.0 (MAX) 1.2 (MAX) @26 MHz
Harmonics (dBc) -8.0 (MAX)
Frequency control range (ppm) ±5.0 to ±12.0 Vcont = 1.4V ±1.0V

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