What this DDR II SRAM is and where it fits
The CY7C1393KV18-300BZXC is a Cypress 18Mbit synchronous DDR II SRAM organized as 1M x 18 bits, clocked at 300 MHz over a parallel interface. It operates from a 1.7V to 1.9V supply and is housed in a 165-ball FBGA (13x15 mm) package. This part is designed for high-bandwidth, low-latency buffer applications in networking equipment, telecom line cards, and test instrumentation where the DDR II architecture eliminates dead cycles on back-to-back reads and writes.
300 MHz clock — what it means for the bus
At 300 MHz, the DDR II interface transfers data on both clock edges. The 1.7V to 1.9V core supply keeps I/O swing small.
Temperature grade and environment
Rated for 0°C to 70°C ambient, this is a commercial-grade part. It belongs in indoor, temperature-controlled racks — central-office telecom, data-center switches, or benchtop test gear. Not specified for industrial enclosures or outdoor cabinets where the ambient may swing outside that window.
Lifecycle and sourcing reality
This part carries an EOL hot lifecycle status, meaning the manufacturer has announced end-of-life and the last-time-buy window is open. Procurement should treat it as a time-limited sourcing event. We source and quote this part to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time. No official pin-compatible successor is listed in the available records, so any replacement would require a full qualification cycle.