The Cypress CY7C09099V-12AC is a 1 Mbit dual-port synchronous SRAM organized as 128K x 8 bits, designed for systems where two independent bus masters (processors, DSPs, or ASICs) need simultaneous read/write access to a shared memory block without arbitration overhead. The synchronous interface clocks at up to 50 MHz, and the 12 ns access time allows back-to-back read/write cycles with minimal wait states in a shared-memory topology.
This part carries an official lifecycle status of Obsolete, meaning Cypress has discontinued production and no last-time-buy window remains open. No direct replacement order code is listed by the manufacturer, so any alternate must be evaluated for pin-compatibility and timing equivalence on a case-by-case basis.
Because this is a synchronous dual-port device, both ports can run at the full 50 MHz independently, enabling full-duplex data transfer between two bus masters without dead cycles.