Cypress Semiconductor Corp CY7C2565KV18-450BZXC

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 separate read/write ports, and uses 1.8 V core / 1.4–1.8 V I/O supplies in a 165-ball FBGA package. It is used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C2565KV18 datasheet, CY7C2565KV18 pinout, CY7C2565KV18 application, or CY7C2565KV18 equivalent, key selection criteria include burst depth, ODT support on D[35:0]/BWS[3:0]/K/K inputs, echo clock (CQ/CQ) timing margin, QVLD data validity signaling, and compatibility with HSTL-18/15 I/O standards in multi-port memory subsystems.

Technical Context

This device implements a synchronous pipelined QDR II+ architecture with fully independent read and write ports sharing a multiplexed address bus. Read and write operations are latched on alternate rising edges of the K clock, enabling concurrent access without bus turnaround.

It integrates a PLL for precise data placement, echo clocks (CQ/CQ) for source-synchronous capture, and programmable ODT on data, byte-write select, and clock inputs. The DOFF pin selects between 2.5-cycle (HIGH) and 1-cycle (LOW) read latency modes, maintaining functional alignment with legacy QDR I systems when needed.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body height, 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 IDT72T36150 and IS61WV102436B, CY7C2565KV18 uniquely offers runtime latency reconfiguration (via DOFF), integrated ODT for signal integrity at 450 MHz, and echo clocks for simplified timing closure-making it optimal for adaptive, high-reliability networking designs.

Availability

CY7C2565KV18 is available at Aetrix Electronics and suitable for high-speed network switch buffering, telecom line card packet memory, multi-core processor cache coherency directories, and high-frequency trading FPGA lookup tables requiring stable component supply across extended production lifecycles.

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) is a U.S.-based semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

CY7C2565KV18 belongs to Cypress's QDR®II+ SRAM product line, engineered specifically for deterministic, low-latency, high-bandwidth memory interfacing in packet-processing and real-time control systems.

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 read latency for QDR II+ operation; when LOW, it reverts to 1-cycle latency compatible with QDR I timing. This allows system-level optimization between bandwidth efficiency and absolute latency minimization without hardware change.

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

ODT provides programmable 50 Ω termination on D[35:0], BWS[3:0], and K/K inputs, calibrated via the ZQ pin connected to a 240 Ω resistor. It eliminates the need for 76 external termination resistors, reduces PCB layer count, improves signal integrity at 450 MHz, and simplifies routing of high-speed buses in dense switch fabric designs.

Can CY7C2565KV18 operate with 1.5 V I/O voltage?

Yes - its VDDQ range is specified from 1.4 V to 1.8 V, fully supporting HSTL-15 (1.5 V) operation. This enables interoperability with legacy 1.5 V FPGAs and ASICs while retaining full 450 MHz performance and ODT functionality, unlike many competing QDR II+ parts limited to 1.8 V only.

What is the role of CQ and CQ echo clocks?

CQ and CQ are source-synchronous output clocks driven with the same phase and skew as Q[35:0] data. They enable the receiving device (e.g., FPGA) to latch data with relaxed setup/hold margins, eliminating the need for complex deskew circuitry or dynamic phase alignment - critical for reliable 900 MT/s DDR capture in production systems.