Inphi intros differential encoders for DPSK, duobinary precoding
July 26, 2006 Westlake Village, CA -- Inphi Corp. has introduced differential encoders in a low-cost quad flat no-lead (QFN) plastic package. The company's 13650DE and 13651DE single-chip Differential Phase Shift Keying (DPSK) or Duobinary encoders operate up to 12.5 Gbits/sec.
Designed to meet the demands of telecommunications systems and transponders, Inphi's Differential Encoders provide substantial signal integrity, ensuring the highest performance in a wide range of designs, say company representatives. The 13650DE and 13651DE are qualified and are compliant with JESD 47 as well as Telcordia GR-357-Core. For the price-sensitive, higher volume communications equipment market, the QFN family offers greater price reductions in volume than are possible with metal or ceramic packages.
"The low-cost QFN differential encoders meet an important need in the design of modules and line-cards that are flexible enough to meet the complex and continually changing needs of the telecommunications marketplace," notes Kevin Nary, vice president of engineering for Inphi Corp. "Our customers tell us that our family of differential encoders are a primary example of Inphi's commitment to setting industry standards in integrated circuit performance."
The13650DE and 13651DE differential encoders feature:
• A single-chip design that allows engineers to incorporate DPSK / Duobinary with what the company claims is the industry's smallest footprint solution;
• A 3.3-V supply (choice of positive or negative) that enables reliable interfacing to a variety of logic levels;
• Performance from 1 Gbit/sec to 12.5 Gbits/sec--with extremely low jitter-- ensuring flexibility in design and application;
• The option of using either single-ended or differential inputs for the clock and data;
• > 300-degree input phase margin, which eases design by allowing a large window where the clock and data can be misaligned;
• A large output swing of 1.2-Vpp differential, which enables it to interface to a variety of drivers;
• Fast rise and fall times that produce a cleaner and wide-open eye with better signal integrity; and
• Pin-to-pin compatibility to the 13600DF and 13601DF for NRZ transmission format.
Inphi's 13650DE/13651DE and 13600DE/13601DE parts are available immediately. Initial pricing is expected to be $127 per part in quantities of 100. Volume discounts are available.