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Updated: July 8th, 2008 05:26 PM CDT

National Semiconductor Introduces Industry's Lowest Jitter SerDes Chipset

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"Low cost FPGA families have lacked the ability to support high speed serial interfaces," said Jim Beneke , vice president of global technical marketing for Avnet Electronics Marketing. "With the introduction of National Semiconductor's new serializers and deserializers, our customers now have the ability to add high speed serial interfaces that are both easy to implement and cost effective. Together National and Avnet have developed the necessary tools and reference designs to help our FPGA customers succeed in using these exciting new SerDes products."

National also offers reference IP and design guides for interfacing FPGAs to the DS32ELX0421 and DS32ELX0124. As part of its FPGA IP package, National includes a bit error rate test (BERT) engine for test pattern generation/validation and system-level functions such as link aggregation and failover.

Technical Features - DS32ELX0421 Serializer

Offered in a small 48-pin LLP(R) package, National's DS32ELX0421 serializer includes a double data-rate (DDR) 5-bit LVDS parallel data interface and a redundant serial output channel. The integrated jitter cleaning PLL accepts a wide 125 MHz to 312.5 MHz input clock for a serial data rate of 1.25 Gbps to 3.125 Gbps. The DS32ELX0421 allows programming of transmit de-emphasis levels, output voltage levels, and selection of DC-balance encoding. This programming flexibility enables the use of DS32ELX0421 in a wider range of interconnect media and applications compared to existing serializers. A remote sensing feature automatically detects and negotiates link status with the companion DS32ELX0124 deserializer. The DS32ELX0421 typically consumes 470 mW of power at 3.125 Gbps.

Technical Features - DS32ELX0124 Deserializer

Offered in a small 48-pin LLP package, National's DS32ELX0124 deserializer includes a DDR 5-bit LVDS parallel interface, redundant serial input and retimed serial output channel. The DS32ELX0124 deserializes up to 3.125 Gbps of high-speed serial data to five LVDS outputs without the need for an external reference clock. The DS32ELX0124 offers programmable receive equalization, and a minimum jitter tolerance of 0.9 UI. A remote sensing feature automatically signals link status conditions to its companion DS32ELX0421 serializer for intelligent link management. The DS32ELX0124 typically consumes 525 mW of power at 3.125 Gbps.

In addition to the DS32ELX0421 serializer and DS32ELX0124 deserializer, National also offers the DS32EL0421 serializer for applications that do not require a redundant serial output channel and the DS32EL0124 deserializer without a redundant serial input and a retimed serial output channel.


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