Reference Design has 2.4 GHz wireless link and 25 m range.

Press Release Summary:

Using fully digital, 2.4 GHz wireless link, RFWaves reference design for USB-based wireless headset uses RFWaves RFW322M 3-Mbps DSSS half duplex transceiver as core component and includes specifications for wireless headset/handset as well as USB dongle. Its RFW332M provides 7 dBm output power and -75 dBm receiver sensitivity while delivering 16-bit PCM, 8,000 samples/sec voice quality. Specified operating range is 6 m typ or 25 m with additional RF power amp.

Original Press Release:

Vishay RFWaves Reference Design for USB-Based Wireless Headset Features 2.4-GHz Wireless Link, 16-Bit PCM Audio Quality, Range Up to 25 Meters

MALVERN, PENNSYLVANIA - November 30, 2005 - Vishay Intertechnology, Inc. (NYSE: VSH) today announced the release of a complete Vishay RFWaves reference design for a USB-based wireless headset using a fully digital 2.4-GHz wireless link. Target applications for the system include VoIP, PC-based cordless telephony, and PC-based intelligent toys.

The new design uses the Vishay RFWaves RFW322M 3-Mbps direct sequence spread spectrum (DSSS) half duplex transceiver as its core component, and includes specifications for both the wireless headset/handset and the USB dongle.

The RFW332M provides an output power of 7 dBm and receiver sensitivity of -75 dBm while delivering 16-bit PCM, 8000 samples/second voice quality. The specified operating range for the design is 6 meters and can be extended to 25 meters with the addition of an RF power amplifier. The high 2.4-GHz bandwidth of the RFW322M and the exceptional link robustness results in a very reliable and high-quality voice link. The use of printed diversity antennas for the USB further helps to overcome link losses.

The USB dongle component of the reference design specifies the use of a microcontroller to exchange voice/data packets with the PC, to execute a proprietary wireless communication protocol to transfer data over the air, and to perform an antenna diversity algorithm. The dongle uses the Vishay RFWaves RFW332M as its wireless transceiver. The dongle is powered by the USB port and typically draws 70 mA.

In the remote headset/handset unit, a microcontroller executes the proprietary communication protocol to exchange data with the USB dongle, while feeding incoming data to a high-quality mixed-signal codec. The codec provides analog signals for the speaker and microphone in the headset or handset. The remote unit draws 40 mA and is designed to run for up to four hours from a single lithium ion battery cell.

The system has been designed and tested to coexist with 802.11b/g and Bluetooth and is compliant with FCC, ETSI, and Telec regulations.

Complete details of the reference design are available on request from Pricing for the RFW322M transceiver, which is available now, starts at $3.30 each in 10,000-piece quantities.

About Vishay

Vishay Intertechnology, Inc., a Fortune 1,000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, rectifiers, transistors, and optoelectronics) and selected ICs, and passive electronic components (resistors, capacitors, inductors, and transducers). Vishay's components can be found in products manufactured in a very broad range of industries worldwide. Vishay is headquartered in Malvern, Pennsylvania, and has operations in 17 countries employing over 25,000 people. Vishay can be found on the Internet at

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