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New Family of LVDS Serializers Provides High Speed 1.84 Gbps Interconnects in Telecommunications and Data Communications Applications

Oct 6, 1997

October 6, 1997 -- National Semiconductor Corporation® today announced the industry’s first 3V Channel Link driver and receiver chip sets. The DS90CR215/ 216 and DS90CR285/ 286 are designed for telecommunications and data communications applications that require smaller interfaces and are moving to 3.3V operation to save power. The devices are pin compatible with existing 5V Channel Link parts, making migration to lower voltage simple.

The 3.3V 66MHz DS90CR215/216 squeezes a 21-bit TTL bus to 4 LVDS (Low Voltage Differential Signaling) channels while the DS90CR285/286 squeezes a 28-bit TTL bus to only 5 LVDS channels. The chip sets are ideal for high bandwidth (up to 1.84 Gbps) point-to-point links within a system, for example short (<5M) card-to-card and box-to-box connections such as stackable hubs. The muxing/demuxing of the Channel Link chip set greatly reduces the number of conductors required, thus shrinking the physical size and cost of cables and connectors. Channel Link can reduce cable and connector size by up to 80%, and cable costs by up to 50%. This compact interconnect enables designers to realize high performance design solutions that were not previously possible due to size, power consumption and cost.

"Our customers are continuously looking for ways to increase the performance and functionality of their designs, while at the same time reducing the overall system cost," said Guy Nicholson, Interface marketing manager at National Semiconductor. “With the Channel Link family, we worked very closely with our customers to ensure that we were delivering a cost-effective, high-performance solution that reduced cable and connector size -- a key concern for system designers."

The DS90CR215/216 and DS90CR285/286 chip sets offer 3V low-power CMOS design, 20-66MHz PLL, power-down mode, +/- 1V common mode range, and 345 mV swing for low EMI. The PLL requires no external components.

Price and Availability
All members of National’s 3V Channel Link family are available now in production volumes. The DS90CR215MTD and DS90CR216MTD devices come in a 48-lead TSSOP package and are priced at $7.80 each in 1,000-piece quantities. The DS90CR285MTD and the DS90CR286MTD are housed in a 56-lead TSSOP package and are priced at $7.95 in 1,000-piece quantities.

National Semiconductor Corporation, a Fortune 500 company, produces system on a chip silicon solutions for the information highway, based on its leadership in analog and mixed signal technologies. National is headquartered in Santa Clara, California, and focuses on the communications, personal systems and consumer markets. National has annual sales of approximately $2.5 billion and 12,700 employees worldwide. Additional company and product information is available on the World Wide Web at www.national.com.