SAN JOSE -- Mentor Graphics topped Cadence in annual product revenues in 2009 for the first time since the mid 1990s.

While Mentor's sales rose just 0.5% last year, Cadence's product revenue plunged almost 18%, reports industry analyst Gary Smith.

With its acquisition of Valor, Mentor reportedly is now three times larger than the next leading vendor in PCB design.

Synopsys remains the clear leader in overall EDA revenue. However, all its sales are derived from semiconductor tools, not printed circuit or MCM design.

Table. Top EDA Vendors by Product Revenue, 2009

Source: Gary Smith EDA

Ed.: This story was updated July 22 to clarify that the rankings are based on product sales, and not overall revenues. The original story reported the rankings as based on overall revenues. PCD&F regrets the confusion.