1Mbit asynchronous SRAM in a 44-SOJ footprint
The Infineon CY7C1021B-15VXIT is a 1Mbit asynchronous SRAM organized as 64K words by 16 bits, accessed through a parallel interface with a 15 ns access time. The device is housed in a 44-pin SOJ (Small Outline J-lead) package, a surface-mount footprint common in memory subsystems for embedded controllers, telecom line cards, and industrial automation boards where a 16-bit data bus is required.
For a processor running a 50 MHz bus (20 ns cycle), this leaves a 5 ns margin after accounting for address-to-chip-select setup and output hold — workable but tight. Designs that need back-to-back reads without wait states should verify the timing closure against the host's memory controller spec.
Obsolete — sourcing through independent distribution
Infineon lists the CY7C1021B-15VXIT as obsolete. For BOM lines that require this exact order code, the only channel is surplus or broker inventory.