Winbond Electronics' October revenues slid 3.1% from September to NT$2.57 billion (US$85 million), while Macronix International saw its sales decline by a larger 30.9% on month to NT$2.08 billion, according to data released by the non-DRAM specialists.
Winbond, which has diversified its product mix to include niche-market DRAM and NOR flash, saw revenues for the first 10 months of 2010 jump 76.2% from a year earlier to NT$26.69 billion. October sales on an annual basis were up 21.2% from the NT$2.12 billion registered in October 2009.
Including sales generated by logic IC subsidiary Nuvoton Technology, Winbond's consolidated revenues slid 4.7% sequentially to NT$3.16 billion in October 2010. The figure showed 16.2% growth compared to NT$2.72 billion a year earlier.
Macronix turned in NT$2.075 billion in October 2010 revenues, down 30.9% on month and 23.2% on year. Revenues from January through October were NT$24.13 billion, still showing growth from the NT$21.67 billion posted during the same period of 2009.
Macronix makes NOR flash memory, and mask ROM chips for game consoles. Apart from declining NOR flash chips, the company's October revenues were also affected by some shipments of mask ROM that have been deferred to the first quarter of 2011.
Macronix was quoted in previous reports saying sales of its ROM products would be boosted by launch of a customer's new 3D-enabled handheld gaming console later in 2010.
Macronix reportedly has been a key memory supplier for Nintendo's game consoles.