NY -- Standard&Poor's CreditWire 12/4/97 -- Standard&Poor's today assigned its single-`B' rating to Cypress Semiconductor Corp.'s Rule 144a $175 million convertible subordinated notes due 2002 and its double-`B'-minus rating to the company's $100 million revolving credit facility. Standard&Poor's also assigned its double-'B'-minus corporate credit rating to the company. The outlook is stable. Cypress Semiconductor's ratings reflect the company's good operating performance in a highly competitive commodity market sector and its expanding communications product lines, offset by the pressures of technology evolution and aggressive pricing. San Jose, Calif.-based Cypress manufactures "static memory" (SRAM) and other semiconductors. The company has expanded its SRAM market share to about 7% in the last several years. SRAMs are used