Cypress Semiconductor Corp CY7C2565KV18-500BZXC

Overview

CY7C2565KV18 from Cypress Semiconductor is a 72-Mbit QDR®II+ SRAM with 2M × 36 organization, 500 MHz clock frequency, 2.5-cycle read latency, on-die termination (ODT), and DDR interfaces on independent read/write ports-designed for high-bandwidth packet buffering in network line cards and telecom switching fabric.

For engineers reviewing the CY7C2565KV18 datasheet, CY7C2565KV18 pinout, CY7C2565KV18 application, or CY7C2565KV18 equivalent, key selection criteria include burst depth (4-word), I/O voltage support (1.4V–1.8V), HSTL-compatible interfaces, FBGA-165 package compatibility, and DOFF-controlled latency mode switching between 1-cycle and 2.5-cycle operation.

Technical Context

This device implements a synchronous pipelined architecture with physically separate read and write data paths, eliminating bus turnaround overhead. It uses dual input clocks (K/K) sampled only on rising edges and echo clocks (CQ/CQ) to align data capture at 1100 MT/s effective rate.

The internal memory array is partitioned into four 512K × 36 sub-arrays, accessed via a shared 19-bit multiplexed address bus latched on alternating K-clock edges. Write operations are self-timed and fully synchronous, while QVLD provides cycle-accurate output validity indication for reliable high-speed latch timing.

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 IDT72T3615L10PF and IS61WV102436B, CY7C2565KV18 uniquely combines 500 MHz DDR operation, programmable 1/2.5-cycle latency, integrated ODT, and 1.4–1.8V I/O flexibility-making it the only option capable of sustaining 1100 MT/s full-duplex traffic in space-constrained telecom hardware.

Availability

CY7C2565KV18 is available at Aetrix Electronics and suitable for packet buffering in 10G/40G line cards, switch fabric memory in modular routers, and baseband processing in LTE eNodeB requiring stable component supply across long-life telecom deployments.

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.

CY7C2565KV18 belongs to Cypress's QDR®II+ SRAM product line, engineered specifically for deterministic, low-latency, full-duplex memory access in high-speed networking and signal processing infrastructure.

FAQ

What is the function of the DOFF pin on CY7C2565KV18?

The DOFF (Delay OFF) pin configures read latency mode: when driven HIGH, it enables 2.5-cycle read latency for optimal QDR II+ performance; when driven LOW, it reverts to 1-cycle latency compatible with legacy QDR I timing. This is a static configuration pin sampled at initialization and must remain stable during operation.

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

ODT activates internal 50Ω termination resistors on D[35:0], BWS[3:0], and K/K inputs when the ODT pin is asserted. It eliminates need for 72 discrete 50Ω resistors, reduces PCB area by ~120 mm², and improves signal integrity by matching transmission line impedance directly at the die bond pads.

Can CY7C2565KV18 operate with VDDQ = 1.5V?

Yes-CY7C2565KV18 supports VDDQ from 1.4V to 1.8V, including 1.5V. This allows direct interfacing with 1.5V FPGA I/O banks (e.g., Xilinx Virtex-6 HP banks) without level shifters, while maintaining full 500 MHz operation and HSTL Class I compliance per JEDEC JESD8-12.

What is the purpose of CQ and CQ echo clocks?

CQ and CQ are source-synchronous echo copies of K and K clocks, routed alongside Q[35:0] outputs. They provide precise timing references at the receiver to capture DDR data with minimal skew-enabling reliable 1100 MT/s operation without complex PLL-based deskew circuitry in the controller.