Dual-port synchronous SRAM for shared-memory designs
The Infineon (Cypress) CY7C09389V-6AXC is a 1.152 Mbit dual-port synchronous SRAM organized as 64K x 18 bits, with a 6.5 ns access time and a 100 MHz clock frequency. This part is designed for applications where two independent buses need simultaneous access to a shared memory array — common in multiprocessor systems, network switches, baseband processing, and video frame buffers where one port handles data writes and the other handles reads without arbitration overhead.
The 6.5 ns access time and 100 MHz clock rate allow back-to-back read/write cycles with minimal wait states in a synchronous system. For a 100 MHz bus, the 10 ns cycle time leaves 3.5 ns of margin for board trace delays, clock skew, and setup/hold requirements — tight but workable with proper signal-integrity layout. The 64K x 18 organization (18-bit data width) suits designs that need parity or ECC alongside a 16-bit data word, or two 9-bit bytes per cycle.
It is not specified for industrial or automotive temperature extremes.