The CY7C199-15VC is officially obsolete per the manufacturer (Infineon Technologies). No direct pin-compatible replacement is listed on the official record.
15 ns access, 32K x 8 organization
This is a 256Kbit asynchronous SRAM organized as 32K words by 8 bits, with a 15 ns access time and a matching 15 ns write cycle time (word, page). The parallel interface and 4.5-5.5 V supply make it a direct fit for legacy 5 V bus systems that need fast scratchpad or cache memory. The 0-70°C commercial temperature grade suits indoor, temperature-controlled environments — office equipment, test gear, or telecom line cards that stay within that range.
28-SOJ surface-mount package
Housed in a 28-SOJ (Small Outline J-Lead) package, 0.300-inch body width, 7.62 mm. The J-lead footprint is reworkable with hot air — the leads are visible for inspection and the package body lifts without pulling pads if the preheat profile is right. Supplied in tube packaging. Surface-mount assembly with a 1.27 mm pitch typical for SOJ — standard pick-and-place handles it without special tooling.