144 Mbit QDR II SRAM at 300 MHz — what the clock rate buys you
The Infineon CY7C1615KV18-300BZXI is a 144 Mbit synchronous QDR II SRAM organized as 4M x 36, clocked at 300 MHz. QDR II architecture delivers separate read and write data ports, eliminating the bus-turnaround dead cycles that conventional synchronous SRAMs incur. At 300 MHz each port can transfer one 36-bit word per clock edge, giving an aggregate bandwidth of 21.6 Gbit/s (300 MHz × 36 bits × 2 edges).
The 200 mV tolerance means the regulator must hold regulation within that band under load transients; a standard 1.8 V LDO with ±2% accuracy covers it comfortably. The 165-ball FBGA (15 x 17 mm) package requires a multi-layer PCB with dedicated power and ground planes to keep supply impedance low at 300 MHz switching edges. Bypass capacitor placement close to the BGA balls is critical — the datasheet layout guidelines should be followed for the recommended capacitor count and value.
The 'I' suffix in the order code (BZXI) confirms the industrial temperature grade. For designs that must operate below -40°C or above 85°C, a wider-temperature variant would be needed — this part does not cover extended or military ranges.
No official successor has been designated because none is needed — the part is current. If an EOL event occurs in the future, Infineon typically provides a 12- to 24-month last-time-buy window, but no such notice exists today.