144Mbit QDR II SRAM at 300 MHz — what the specs mean for a line-card design
The Infineon CY7C1612KV18-300BZC is a synchronous QDR II SRAM organized as 8M x 18 bits, clocked at 300 MHz over a parallel interface. QDR II architecture dedicates separate read and write data ports, so the bus never stalls on a read-to-write turnaround — a key advantage for high-throughput applications like network switch buffers, telecom line cards, and test equipment where back-to-back transactions dominate. The 1.7V to 1.9V supply range aligns with low-voltage core logic but demands clean rail regulation; a 1.8V nominal supply with ±100 mV tolerance fits the window. The 165-FBGA (15x17 mm) footprint requires a multi-layer PCB with microvia fanout under the ball array — this is not a two-layer-board part.
Not qualified for industrial motor drives, outdoor base stations, or automotive under-hood applications where ambient temperatures push beyond 70°C.
Infineon lists the CY7C1612KV18-300BZC as Obsolete. No last-time-buy window remains open from the factory. The official record does not name a direct pin-compatible replacement; buyers should treat this as a sole-source line that must be filled from surplus or broker inventory. Laser-etched markings and package consistency are checked against Infineon's known factory formats before any unit ships.