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News Release

Teridian Semiconductor Corporation Approves
Datatronics Modem Transformer For Reference Designs

Highly Reliable For Voice and Data Applications

PT79281 Transformer Photo

ROMOLAND, CA–May 11, 2010—Teridian Semiconductor Corporation has approved the new Model PT79281 V.22bis Modem Transformer from Datatronic Distribution, Inc., for use with its reference designs that include the Teridian IC Models 73M1903, 73M1903C, 73M2901CE and 73M2901CL.

Teridian now includes the Datatronic Model PT9281 Modem Transformer on its Model 73M2901CE EVM Demo Board.  The new PT79281 is a drop-in device developed to support Teridian IC reference designs that typically include voice applications as well as high speed data modems, satellite set-top boxes, POS terminals, MFP and FAX terminals and IP phones.

The Datatronic PT79281 Modem Transformer is a highly reliable V.22bis modem transformer for use with Teridian IC circuit designs.  It provides space-efficient isolation between sensitive electronics and voice or data lines.  Featuring a high dielectricstrength tested to 3750 Vrms, it helps safeguard equipment users and their data by protecting them from electrical shock.

The Datatronic PT79281 Modem Transformer’s advanced design and construction offers excellent performance.  Key specifications include: a primary impedance of 600 ohms, turns ratio of 1:1 ±2 percent, 4.6H shunt inductance and 3.7 mH leakage inductance.

The PT79281 V.22bis Modem Transformer comes in a 16.6 mm (0.649 inch) square package with a 10.5 mm (0.417 inch) seated height above the circuit board.  Lead terminal finish is RoHS compliant; solder meets J-STD-020D. Its superior performance in a relatively small package makes it ideal for high density circuit designs.

The Datatronic PT79281 Transformer withstands high temperature soldering and operating temperature environments from –40ºC to +105ºC;   storage temperature range is -40ºC to +125ºC.  The PT79281 comes in tape-and-reel packaging for auto insertion equipment.

In 10,000 piece quantity, the Datatronic PT79281 Transformer is available beginning at $0.37 each.  Lead-time is stock to six weeks.  Volume OEM pricing is available upon request.

For more information, contact Datatronic Distribution Inc., 28151 Highway 74, Romoland, CA 92585, at telephone 951-928-7700, or fax 951-928-7701, or email at, or visit the website at
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