36Mbit QDR II at 300 MHz — the throughput ceiling
The CY7C1426KV18-300BZXC is a 36Mbit QDR II synchronous SRAM organized as 4M x 9, clocked at 300 MHz via a parallel interface. This is a high-bandwidth part built for look-aside caches, packet buffers, and network processor memory where the bus must keep up with line-rate traffic. The 300 MHz clock means each read or write cycle completes in under 3.3 ns — the limiting factor in a high-throughput design is often the board trace delay, not the SRAM itself.
Supply rail and temperature — the operating envelope
The core supply is 1.7V to 1.9V, a tight window that demands a clean rail with ripple well below 50 mV peak-to-peak at the package pins. The 165-FBGA (13x15 mm) footprint places the decoupling caps close to the BGA balls — any inductance in the supply path eats into the timing margin at 300 MHz.