Obsolete — sourcing through surplus and broker channels
The CY7C1399BN-15VXAT is officially marked obsolete by Infineon Technologies, meaning the manufacturer's last-time-buy window has closed and no further production is planned.
32K x 8 asynchronous SRAM — 15 ns access, 3.3 V single-rail
Organised 32K words by 8 bits, the 256 Kbit density suits small boot-code storage, parameter tables, or scratchpad buffers in embedded systems that need deterministic read/write timing without refresh overhead. The 15 ns access time sets the memory-read cycle ceiling — a CPU sampling data at 15 ns or faster must insert wait states unless its memory controller matches this window. Write cycle time is also 15 ns per word. No separate Vddq or Vpp required.
28-SOJ footprint — standard 300-mil body width
Housed in a 28-lead SOJ (Small Outline J-bend) package with 7.62 mm (300 mil) body width — a common footprint shared by many 32K x 8 asynchronous SRAMs, simplifying board layout if a cross-reference is needed.