Infineon Technologies CY7C2564XV18-366BZC

Overview

CY7C2564XV18-366BZC from Cypress Semiconductor is a 2M × 36, 72-Mbit QDR® II+ Xtreme SRAM with 2.5-cycle read latency, 450 MHz clock support, DDR interfaces on both ports (900 Mbps effective data rate), and on-die termination (ODT) for D[35:0], BWS[3:0], and K/K inputs-designed for high-bandwidth packet buffering in network line cards.

For engineers reviewing the CY7C2564XV18-366BZC datasheet, CY7C2564XV18-366BZC pinout, CY7C2564XV18-366BZC application, or CY7C2564XV18-366BZC equivalent, key selection factors include its 2M × 36 configuration, 165-ball FBGA package, HSTL I/O compatibility, DOFF-configurable latency (1-cycle or 2.5-cycle), and JTAG 1149.1 test access support.

Technical Context

This SRAM implements a true dual-port synchronous architecture with physically separate read and write data paths-eliminating bus turnaround and enabling concurrent read/write operations without arbitration. Its two-word burst transfers per cycle and echo clocks (CQ/CQ) align output data precisely to system timing requirements.

The device integrates a PLL for accurate data placement, supports programmable ODT via ZQ calibration and ODT pin logic level, and uses independent K/K clocks sampled only on rising edges-ensuring deterministic DDR timing at 450 MHz while maintaining full data coherency across both ports.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, RoHS-compliant Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36120L10BG and IS61WV102432BLL-15BLI, CY7C2564XV18-366BZC uniquely balances 450 MHz operation, 2.5-cycle configurable latency, integrated ODT, and JTAG testability-making it optimal for mid-tier telecom and test equipment where reliability, timing flexibility, and debug readiness are prioritized over peak speed.

Availability

CY7C2564XV18-366BZC is available at Aetrix Electronics and suitable for high-speed network line cards, telecom baseband processing, test equipment memory subsystems, and avionics data acquisition units requiring stable component supply and long-term lifecycle support.

Supply support for CY7C2564XV18-366BZC 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 system-level integration.

CY7C2564XV18 belongs to the QDR® II+ Xtreme SRAM product line-engineered specifically for deterministic, low-latency, high-throughput buffering in full-duplex communication infrastructure where bus turnaround elimination is critical.

FAQ

What is the function of the DOFF pin on CY7C2564XV18-366BZC?

The DOFF (Data-Off) pin configures read latency mode: when asserted HIGH, the device operates in QDR II+ mode with 2.5-cycle read latency; when LOW or tied to VSS, it reverts to QDR I mode with 1-cycle latency. This pin is sampled at power-up and remains latched until reset, enabling runtime latency tuning without firmware changes.

How does on-die termination (ODT) work on this SRAM?

ODT is enabled via the ODT pin and calibrated using an external ZQ resistor (175–350 Ω). When ODT is active, it applies programmable termination to D[35:0], BWS[3:0], and K/K inputs-replacing up to 72 external resistors. The ODT resistance value is either RQ/3.33 (low range) or RQ/1.66 (high range), selected by the logic level on the ODT pin at power-up.

Can CY7C2564XV18-366BZC be used with a 366 MHz clock?

Yes-the "366" in the part number denotes qualification at 366 MHz, but the device is fully rated for 450 MHz operation per datasheet Rev. *G. At 366 MHz, it delivers 732 MT/s per port with relaxed timing margins, making it suitable for systems where thermal or layout constraints prevent full 450 MHz utilization while retaining QDR II+ feature set.

What is the role of CQ and CQ echo clocks?

CQ and CQ are free-running, phase-aligned output clocks synchronized to K and K respectively. They provide precise timing references for capturing Q[35:0] data in high-speed receivers-eliminating need for internal delay-locked loops or complex deskew circuitry. Their edge alignment with QVLD ensures unambiguous data-valid window detection.