Cypress Semiconductor Corp CY7C2565KV18-500BZC

Overview

CY7C2565KV18 from Cypress Semiconductor is a 72-Mbit QDR®II+ SRAM with 2M × 36 organization, 500 MHz operation, 2.5-cycle read latency, and on-die termination (ODT) supporting D[35:0], BWS[3:0], and K/K inputs. It features separate read/write DDR ports, echo clocks (CQ/CQ), QVLD data-valid signaling, and operates at VDD = 1.8 V ± 0.1 V with VDDQ = 1.4–1.8 V for high-bandwidth packet buffering in network line cards.

For engineers reviewing the CY7C2565KV18 datasheet, CY7C2565KV18 pinout, CY7C2565KV18 application, or CY7C2565KV18 equivalent, key selection criteria include burst depth (4-word), concurrent read/write capability, FBGA-165 package compatibility, ODT configuration flexibility, and PLL-synchronized timing for deterministic 1100 MT/s data transfer.

Technical Context

The CY7C2565KV18 implements a synchronous pipelined QDR II+ architecture with independent read and write ports sharing a multiplexed 19-bit address bus (A[18:0]). Read and write operations are latched on alternate rising edges of the K clock, enabling true concurrency without bus turnaround.

It integrates a phase-locked loop (PLL) for precise data placement, echo clocks (CQ/CQ) to simplify high-speed capture, and programmable ODT on data, byte-write-select, and clock inputs-eliminating external termination resistors while maintaining signal integrity at 500 MHz.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body height, RoHS-compliant, 1.0 mm ball pitch.

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 IS61QW25636B, the CY7C2565KV18 uniquely combines programmable ODT, 1.4–1.8 V VDDQ flexibility, and echo-clock–assisted timing - delivering lower system-level BOM cost, broader voltage interoperability, and higher timing margin in 500 MHz packet-processing systems.

Availability

CY7C2565KV18 is available at Aetrix Electronics and suitable for network line cards, telecom baseband modules, high-speed test instrumentation, and switch fabric subsystems requiring stable component supply, long-lifecycle support, and verified QDR-II+ timing 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

The QDR®II+ SRAM product line was designed specifically for deterministic, high-bandwidth buffering in networking and telecommunications infrastructure - emphasizing concurrent access, low latency, and signal integrity at multi-GHz data rates.

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 maximum bandwidth; when LOW, it reverts to 1-cycle latency for minimal access delay. This is a static configuration pin sampled at power-up and must remain stable during operation - it does not support runtime switching.

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

ODT is enabled by driving the ODT pin HIGH, activating 50-Ω termination resistors on D[35:0], BWS[3:0], and K/K inputs. Termination strength is fixed and non-adjustable. The feature eliminates external resistors, reduces stub length sensitivity, and improves signal integrity at 500 MHz - but requires proper ODT pin biasing and is disabled when ODT = LOW.

Can CY7C2565KV18 operate with different VDDQ and VDD voltages?

Yes: VDD is fixed at 1.8 V ± 0.1 V for core logic, while VDDQ supports 1.4 V to 1.8 V for I/O buffers - allowing interoperability with 1.5 V or 1.8 V ASIC interfaces. VDDQ must be ≥ VDD − 0.4 V and ≤ VDD; using VDDQ = 1.4 V reduces I/O power by ~22% versus 1.8 V at full bandwidth.

What is the purpose of CQ and CQ echo clocks?

CQ and CQ are output-synchronized copies of the K and K input clocks, aligned to Q[35:0] data edges. They provide a clean, low-skew reference for the receiving device (e.g., FPGA) to latch read data without needing adjustable input delays - essential for reliable 1100 MT/s DDR capture with zero setup/hold margin requirements.