12 ns asynchronous SRAM for legacy 5V bus designs
The Cypress CY7C1020B-12ZXCT is a 512Kbit asynchronous SRAM organized as 32K x 16 bits, with a 12 ns access time that suits it for cache, buffer, or scratchpad memory in 5V DSP and CPLD systems from the late-1990s through mid-2000s design cycles. It uses a parallel interface and requires no refresh, simplifying the bus controller logic compared to DRAM alternatives.
Cypress officially lists the CY7C1020B-12ZXCT as Obsolete. No last-time-buy window remains open from the factory. Sourcing now runs through independent distribution and the surplus market. Every reel we quote is physically inspected — date-code consistency, marking font match against Cypress plant records, and decap/X-ray verification for die authenticity.
12 ns access time — timing closure for 5V buses
The 12 ns access time is the critical spec for read-cycle timing.