The CY7C199CL-15VXCT: No official successor is listed, so any replacement requires a board-level evaluation of pin-compatible asynchronous SRAMs in the 28-SOJ footprint. This part is sourced through independent distribution against an RFQ.
15 ns access — timing margin for legacy buses
The 15 ns access time sets the read-cycle ceiling for a 5 V parallel bus. At a 33 MHz bus clock (30 ns period), the address-to-data valid window leaves 15 ns for setup and hold — tight but workable if the controller's output delay is under 10 ns.
32K x 8 organization — byte-wide data path
Organised as 32K words of 8 bits, the CY7C199CL-15VXCT fits a byte-wide memory map. For an 8-bit microcontroller or a legacy 16-bit CPU that banks memory in 8-bit increments, this maps directly without glue logic.
28-SOJ surface-mount — board-fit considerations
The 28-SOJ package (300 mil body width, 7.62 mm) uses J-bend leads on a 1.27 mm pitch. The footprint is standard for 28-pin SOJ SRAMs; the solder paste stencil should match the lead width for reliable fillet formation.