The CY7C1041CV33-12ZXC is a Cypress 4Mbit asynchronous SRAM organized as 256K x 16 bits, with a 12 ns access time that matches fast bus cycles on older 16-bit processors and DSPs without wait states. It comes in a 44-TSOP II package, surface-mount, rated for commercial temperature operation from 0°C to 70°C.
This part is officially marked Obsolete by Cypress. No factory orders are accepted; the only channel is surplus and broker inventory.
A 12 ns access time means the SRAM can deliver data within one clock cycle of a 66 MHz bus without wait states, or two cycles on a 100 MHz bus.