CY7C139

CY7C138 CY7C1394K x 8/9 Dual-Port Static RAM with Sem, Int, Busy CY7C138 CY7C139 Features True Dual-Ported memory cells that allow simultaneous reads of the same memory location 4K x 8 organization (CY7C138) 4K x 9 organization (CY7C139) 0.65-micron CMOS for optimum speed/power High-speed access: 15 ns Low operating power: ICC = 160 mA (max.) Fully asynchronous operation Automatic power-down TTL compatible Expandable data bus to 32/36 bits or more using Master/Slave chip select when using more than one device On-chip arbitration logic Semaphores included to permit software handshaking between ports INT flag for port-to-port communication Available in 68-pin PLCC Pb-Free packages available Functional Description The CY7C138 and CY7C139 are high-speed CMOS 4K x 8 and 4K x 9 dual-port static RAMs. Various arbitration schemes Logic BlockDiagram R/WL CEL OEL 4K x 8/9 Dual-Port Static RAM with Sem, Int, Busy are included on the C...