Cypress Semiconductor Corp CY7C2565KV18-400BZXC

Overview

CY7C2565KV18 from Cypress Semiconductor is a 2M × 36-bit, 72-Mbit QDR®II+ SRAM with 4-word burst architecture, 2.5-cycle read latency, on-die termination (ODT), and DDR interfaces on independent read/write ports operating at 550 MHz (1100 MT/s). It delivers high-bandwidth buffering for network packet processing in telecom line cards.

For engineers reviewing the CY7C2565KV18 datasheet, CY7C2565KV18 pinout, CY7C2565KV18 application, or CY7C2565KV18 equivalent, key selection criteria include its 2.5-cycle read latency mode, x36 data width, 165-ball FBGA package, 1.8V core / 1.4–1.8V I/O supply support, and HSTL-compatible DDR timing with echo clocks (CQ/CQ) and QVLD signaling.

Technical Context

This device implements a synchronous pipelined QDR II+ architecture with physically separate read and write data paths, eliminating bus turnaround overhead. It uses dual input clocks (K/K) - both rising-edge-triggered - and dedicated echo clocks (CQ/CQ) to align data capture at 1100 MT/s without external phase alignment circuitry.

The internal PLL ensures precise data placement relative to clock edges, while ODT supports programmable termination on D[35:0], BWS[3:0], and K/K inputs. Depth expansion is enabled via RPS/WPS port selects, and write operations are self-timed synchronously with K/K, maintaining full coherency across concurrent read/write transactions.

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 QDR II+ SRAM applications.

Compared with IDT72T3615L10BG and ISSI IS61WV102436B, CY7C2565KV18 uniquely supports dual-latency operation (via DOFF), integrated ODT for signal integrity, and echo clocks that reduce FPGA capture logic complexity - making it optimal for new high-speed packet buffer designs.

Availability

CY7C2565KV18 is available at Aetrix Electronics and suitable for network packet buffering, switch fabric memory, telecom line card buffering, and baseband processing memory requiring stable component supply across multi-year production cycles.

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.

The QDR®II+ SRAM product line targets high-bandwidth, low-latency buffering in packet-switched infrastructure - optimized for deterministic timing, signal integrity, and seamless FPGA/ASIC integration.

FAQ

What is the function of the DOFF pin on CY7C2565KV18?

The DOFF (Data-Off) pin configures read latency mode: when asserted HIGH, it enables 2.5-cycle read latency for maximum bandwidth; when LOW, it reverts to 1-cycle latency compatible with legacy QDR I timing. This pin is sampled at power-up and remains static during operation - no runtime switching is supported.

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

ODT is controlled by the ODT pin and applies programmable 50-Ω termination to D[35:0], BWS[3:0], and K/K inputs simultaneously. It eliminates the need for external series or parallel termination resistors, reducing PCB component count, board area, and routing complexity - especially critical for high-density 165-ball FBGA layouts.

Can CY7C2565KV18 be used with a 1.5V I/O supply?

Yes - VDDQ supports 1.4 V to 1.8 V, including 1.5 V nominal. The device's HSTL Class I inputs and variable-drive outputs maintain specified timing margins and signal integrity at 1.5 V, enabling direct interfacing with 1.5 V FPGAs or ASICs without level-shifting circuitry.

What is the purpose of CQ and CQ echo clocks?

CQ and CQ are delayed replicas of the K and K input clocks, routed alongside Q[35:0] outputs. They provide a clean, phase-aligned reference for capturing DDR read data in the receiving FPGA/ASIC - eliminating the need for complex delay-chain calibration or deskew logic, and relaxing PCB trace-length matching requirements.