250 MHz synchronous SRAM — timing closure at speed
The CY7C1440KV33-250BZXI is a 36Mbit synchronous SRAM organized 1M x 36, clocked at 250 MHz with a 2.6 ns access time.
Supply rail and signal integrity
Operates from a 3.135 V to 3.6 V core supply — the 3.3 V nominal rail with ±5% tolerance. The parallel memory interface expects clean decoupling at the 165-FBGA balls; the 15x17 mm footprint has 165 balls on a 1.0 mm pitch, so the PCB layout should place a 100 nF MLCC per supply ball pair within 2 mm of the ball to keep the supply impedance below 0.1 Ω at the 250 MHz clock harmonic.
Industrial temperature grade and environment
This means the part is characterized and guaranteed for timing at both temperature extremes, not just at 25°C. For a system that sees thermal cycling in an outdoor base station or factory floor, the 2.6 ns access time and 250 MHz clock must hold across the entire range without setup/hold violations. Infineon lists this part as Active in production.