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Oct 21, 1996

October 21, 1996 -- National Semiconductor Corporation® today announced two new members of its growing family of LVDS (low-voltage differential signaling) chips. The DS90LV031 and the DS90LV032 are a quad drivers/receivers that can move large amounts of data, such as video and photo-realistic 3-D graphics, at data rates in excess of 100 megabits per second. The chips operate from 3.3-volt supplies and have low swing signals (~350mV), offering minimum power dissipation and noise.

"One of National's areas of expertise rests within the LVDS arena,"said Doug Turnage,Director of Interface Marketing. "LVDS is able to move data at high speed while minimizing noise, cost and power. Traditional interconnect technologies can't do all this simultaneously."

The combination of high data transmission rate and low-voltage operation provides an ideal, cost-effective solution for a wide range of today's applications, from moving video data between boards in a computer or in a system interconnect such as set-top boxes, laser printers, and routers for telecommunications and data communications equipment. Not only can data be moved very quickly, but the very low noise and electromagnetic interference (EMI) generated by the devices can help the designer meet both FCC and European electromagnetic compatability standards.

Many high-speed systems, especially portable ones, have already begun to use 3V processors, memories, and peripheral chips. The DS90LV031 and the DS90LV032 represent a migration path to the 3V environment for users of National's existing 5V DS90C031 and DS90C032 quad drivers/receivers.

The DS90LV031 driver converts the TTL signals commonly used to communicate between digital chips into an LVDS signal, and the DS90LV032 receiver converts the LVDS signal back into TTL. The characteristics of LVDS signaling allow transmission of the converted data over cable or PCB trace at rates far in excess of those possible with other technologies such as TIA/EIA-422, and at lower power. Even the large amounts of data inherent in full-motion video and 3-D graphics can be moved at high frequencies without requiring large amounts of power or creating noise and EMI problems. This enables systems manufacturers to use less expensive cables to further drive down costs.

Device Features
The DS90LV031 and the DS90LV032 are compatible with the TIA/EIA-644 LVDS standard. The combined dynamic power dissipation of less than 40 mA at 100 MHz makes them ideal for portable system applications. Other benefits include +/- 350mV differential signaling, 200 ps typical differential skew, and 2.6 ns typical propagation delay for the driver.

Price and Availability
The DS90LV031TM and the DS90LV032TM are packaged in 16-pin SOIC packages, and are available now at a price of $3.50 each in quantities of 1,000.

National Semiconductor produces analog and mixed signal based silicon solutions for the information highway, communications, consumer and industrial markets. National Semiconductor is headquartered in Santa Clara, California, and has 19,000 employees worldwide. In fiscal 1996, the company reported sales of $2.6 billion. Additional company information is available on the World Wide Web at www. national.com.