Cypress Semiconductor Corp CY7C2565KV18-450BZI

Overview

CY7C2565KV18 from Cypress Semiconductor is a 72-Mbit QDR®II+ SRAM with 2M × 36 organization, 4-word burst architecture, 2.5-cycle read latency, and on-die termination (ODT). It operates at 450 MHz (2.2 ns cycle time), supports DDR interfaces on independent read/write ports, and uses 1.8 V core / 1.4–1.8 V I/O supplies. It targets high-bandwidth packet buffering in network line cards and switch fabric controllers.

For engineers reviewing the CY7C2565KV18 datasheet, CY7C2565KV18 pinout, CY7C2565KV18 application, or CY7C2565KV18 equivalent, key selection criteria include burst depth (4-word), ODT support on D[35:0]/BWS[3:0]/K/K, echo clock (CQ/CQ) timing margining, QVLD data validity signaling, and FBGA-165 package compatibility with high-speed PCB layout constraints.

Technical Context

This device implements a synchronous pipelined QDR II+ architecture with physically separate read and write data paths-eliminating bus turnaround delays. It latches addresses on alternating rising edges of K and K clocks and delivers data on both rising edges of CQ and CQ echo clocks for precise DDR capture.

The internal 512K × 36 memory array is organized across four sub-arrays, enabling depth expansion via RPS/WPS port selects. A PLL synchronizes internal timing to achieve stable 2.5-cycle read latency when DOFF = HIGH, while supporting 1-cycle latency (QDR I mode) when DOFF = LOW.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, 0.8 mm ball pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-bandwidth dual-port SRAM applications.

Compared with AS7C3256PFS-15JIN and IS61WV102432BLL-10BLI, CY7C2565KV18 uniquely delivers concurrent dual-port operation, 4-word burst efficiency, and ODT - making it irreplaceable in full-duplex, high-frequency packet buffering where timing predictability and board-level signal integrity are mandatory.

Availability

CY7C2565KV18 is available at Aetrix Electronics and suitable for network line card design, telecom baseband modules, and high-speed test equipment requiring stable component supply, long-term lifecycle assurance, and Pb-free compliance.

Supply support for CY7C2565KV18 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs high-performance memory and programmable solutions for networking, automotive, and industrial systems, with emphasis on signal integrity and timing precision.

CY7C2565KV18 belongs to the QDR®II+ SRAM product line, engineered specifically for deterministic, high-bandwidth buffering in packet-switched infrastructure where dual-port concurrency and sub-3-cycle latency are non-negotiable.

FAQ

What is the function of the DOFF pin on CY7C2565KV18?

The DOFF (Delay OFF) pin configures read latency mode: when asserted HIGH, it enables 2.5-cycle QDR II+ operation with maximum bandwidth; when LOW, it reverts to 1-cycle QDR I mode for backward compatibility. This pin is sampled synchronously on the K clock edge and must be held stable during initialization.

How does On-Die Termination (ODT) operate on CY7C2565KV18?

ODT is enabled by driving the dedicated ODT pin HIGH, activating 50 Ω termination resistors on D[35:0], BWS[3:0], and K/K inputs. Termination is disabled when ODT = LOW. This eliminates need for external 50 Ω resistors, reducing PCB area and improving impedance matching at 1100 MT/s data rates.

Can CY7C2565KV18 interface directly with Xilinx Virtex-6 FPGAs?

Yes - its HSTL Class I-compatible I/Os match Virtex-6 HP bank voltage ranges (1.35–1.5 V) and timing requirements. The CQ/CQ echo clocks align with FPGA IDELAY/ODELAY primitives, and the 165-ball FBGA footprint is supported in Xilinx reference designs for QDR II+ memory interfaces.

What is the purpose of the QVLD signal?

QVLD is an active-HIGH strobe synchronized to the first valid word of each 4-word read burst. It indicates exact timing of usable data on Q[35:0], allowing receivers to latch data without fixed delay assumptions - critical for maintaining timing margin at 450 MHz operation.