QDR II SRAM with 250 MHz clock — Last Buy lifecycle
The CY7C1313KV18-250BZC is a 18Mbit synchronous SRAM from Infineon, organized as 1M x 18 and clocked at 250 MHz. It uses the QDR II (Quad Data Rate) architecture, which delivers four data words per clock cycle — two on the rising edge and two on the falling — giving a peak data rate of 1 Gbps per I/O pin on the parallel bus. Infineon has flagged this part as Last Buy, meaning the manufacturer has issued a last-time-buy notice. Production is winding down; the remaining available inventory is what is already built or in the distribution pipeline. New designs should migrate to the successor or a functionally equivalent QDR II+ part if the application can absorb a board spin.
Package and supply rails — board-fit notes
The 250 MHz clock rate and QDR II interface demand tight signal integrity on the PCB. Trace impedance matching and decoupling close to the BGA balls are non-negotiable — the 1.8 V rail should be clean within 50 mV ripple to avoid setup/hold violations on the double-data-rate strobes.
Sourcing posture — Last Buy channel
Because the CY7C1313KV18-250BZC is in Last Buy status, the standard authorized-distributor pipeline is closed to new orders. Available units are factory-sealed trays from surplus inventory — date codes and quantities vary by lot. Sourcing is confirmed per RFQ; no standing stock is held. The base product number CY7C1313 covers the QDR II family; the KV18 suffix denotes the 1.8 V core and 250 MHz speed grade. If the BOM calls for this exact speed and voltage, a direct pin-compatible drop-in from a different speed bin is unlikely without retiming the controller interface.