What this DDR-II SRAM is and where it fits
The Infineon CY7C1320BV18-200BZC is a synchronous DDR-II SRAM — 18 Mbit of fast, volatile memory organized as 512K words of 36 bits each, clocked at 200 MHz. The 36-bit word width is the notable feature here: it matches the data bus width of many networking processors and FPGAs without needing external byte-lane muxing, so it fits directly into high-bandwidth buffer applications like packet buffers, lookup tables, and DSP coefficient storage. The 1.7 V to 1.9 V supply range and 165-ball FBGA package (13x15 mm) place it in the low-voltage, fine-pitch BGA class — a board designed for this part needs controlled-impedance routing and proper BGA assembly reflow.
Obsolete — sourcing reality
Temperature grade and environment
Rated for 0°C to 70°C ambient — commercial temperature grade. That limits this part to indoor, climate-controlled equipment: servers, telecom central-office line cards, test equipment, and similar environments where the ambient stays within an office or data-center range. Not rated for industrial enclosures, outdoor cabinets, or under-hood automotive use.