TI Home > News Releases

News Releases

NEW NATIONAL SEMICONDUCTOR GTL UNIVERSAL BUS TRANSCEIVER REDUCES NOISE, INCREASES BACKPLANE SPEED

Oct 28, 1996

October 28, 1996 -- In an effort to meet the need for greater bandwidth in telecommunication and data communication applications, the Fairchild Division of National Semiconductor Corporation® today introduced the GTLP16612 Universal Bus Transceiver. This 18-bit CMOS integrated circuit combines a universal transceiver function with TTL-to-GTLP translation and is intended to serve as an interface between circuit cards operating at relatively high TTL levels and a system backplane operating at the lower voltage levels of Gunning Transceiver Logic (GTL). The GTLP16612 uses controlled waveshaping to obtain higher communications backplane speed and lower EMI and transmission noise than any other such device now available.

"The popularity of the Internet has caused a need for higher bandwidth and faster backplanes for telecommunication and data communication manufacturers," said Gary O'Donnell, worldwide market development manager for logic at National Semiconductor. "The GTLP16612 will allow manufacturers to take advantage of GTLP's faster backplane speed and thus increase the bandwidth of their systems."t

The essence of logic speed is that the voltage swings between one and zero states must be as small as possible. GTLP, a derivative of GTL, uses an output swing of less than 1V, and helps eliminate noise problems and preserve noise margins. Both GTL and GTLP are optimized for high-performance, 50MHz to 100 MHz PC buses and small, fast communications backplanes. However, they must be able to "talk with" the TTL levels that still exist in other areas of systems. National's GTLP16612 allows this to happen by providing the fast bi-directional interface that is required between GTLP and TTL technologies.

With GTLP, designers are able to obtain very low power consumption; high TTL output drive; and edge rate control compensated for process, voltage and temperature, all benefits that are critical for high-performance PC and communications system design.

The GTLP16612 builds on National's transmission-line experience and its wide portfolio of CROSSVOLTTM bus and backplane logic interface products.

According to O'Donnell, "By combining our waveshaping and lower-power CMOS GTLP technologies, we believe that we’ve done a better job than anyone in the industry of addressing noise issues and are setting a new industry I/O standard."

To further assist designers in the implementation of GTLP technology, National provides a broad suite of design aides, including application support, application notes, IBIS and SPICE simulation models.

Price and Availability
The GTLP16612 is available now in a 56-pin SOPII package.

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. National's Fairchild Division focuses on logic, memory and discrete products.