12 ns access time — bus margin and timing closure
A 12 ns access time means the SRAM presents valid data within 12 ns of the address being stable. For a 66 MHz or slower bus, this gives comfortable setup margin; at higher clock rates the window tightens and the board trace delay starts eating into the budget.
Infineon lists the CY7C1061AV33-12ZXC as Obsolete. For a BOM line that still calls out this exact part, the supply channel is independent distribution — verified surplus or last-time-buy inventory.