The Infineon CY7C1150KV18-400BZXC is a 18 Mbit synchronous SRAM using a DDR II+ (double data rate, second-generation plus) interface. This class of memory is typically used in high-throughput buffer applications — network switches, base stations, and test equipment — where the DDR interface doubles the data rate without increasing the clock frequency.
The 400 MHz clock rate is the core performance spec. Because the interface is DDR II+, data is transferred on both rising and falling clock edges, giving an effective data rate of 800 MT/s per pin. With a 36-bit data bus, that translates to a peak bandwidth of 3.2 GB/s. The 1.7 V–1.9 V supply range keeps I/O levels compatible with low-voltage logic families like HSTL or SSTL, but the tight voltage tolerance means the board's power rail needs to be clean and well-regulated — a 1.8 V rail with ±5% regulation is typical.
This part is no longer available through the factory as new stock. No official successor part is listed in the record.
165-FBGA footprint and assembly
The 165-ball FBGA (13x15 mm) is a fine-pitch BGA. The tray shipping medium means the parts arrive in antistatic trays, not tape-and-reel; plan for pick-and-place handling accordingly.