Infineon Technologies CY7C2264XV18-366BZXC

Overview

CY7C2264XV18 from Infineon Technologies (formerly Cypress) is a 1 M × 36, 36-Mbit QDR® II+ Xtreme SRAM with synchronous pipelined architecture, 2.5-cycle read latency, and on-die termination (ODT). It operates at 450 MHz with DDR interfaces on both read and write ports (900 MT/s effective), supports independent concurrent read/write transactions, and uses HSTL I/O with VDD = 1.8 V and VDDQ = 1.4–1.6 V. It is deployed in high-bandwidth networking line cards for packet buffering.

For engineers reviewing the CY7C2264XV18 datasheet, CY7C2264XV18 pinout, CY7C2264XV18 application, or CY7C2264XV18 equivalent, key selection criteria include burst depth (2-word), ODT support on D[35:0]/BWS[3:0]/K/K, echo clock timing (CQ/CQ), QVLD data validity signaling, and FBGA-165 package compatibility with high-speed PCB routing constraints.

Technical Context

This SRAM implements a true dual-port QDR II+ Xtreme architecture with physically separate read and write data paths-no bus turnaround required. Its 2.5-cycle read latency is enabled when DOFF is HIGH, while asserting DOFF LOW reverts operation to 1-cycle latency like QDR-I devices.

The device integrates a PLL for precise DDR edge alignment, uses echo clocks (CQ/CQ) synchronized to K/K for simplified high-speed data capture, and supports programmable ODT impedance via ZQ calibration and ODT pin logic level-critical for signal integrity above 400 MHz.

Key Specifications

Pinout & Package

Available in 165-ball Fine-Pitch Ball Grid Array (FBGA) package, 13 mm × 15 mm × 1.4 mm height, 0.8 mm ball pitch, Pb-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615 and AS7C362000B, CY7C2264XV18 uniquely combines 450 MHz operation, hardware-selectable latency (1- or 2.5-cycle), integrated ODT, and echo clocks-enabling simpler PCB routing, higher bandwidth, and smoother migration from QDR-I systems.

Availability

CY7C2264XV18 is available at Aetrix Electronics and suitable for telecom line cards, network processor buffers, and switch fabric memory requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY7C2264XV18 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

Infineon Technologies acquired Cypress Semiconductor in 2020 and maintains full product continuity, technical support, and manufacturing for the QDR® II+ Xtreme SRAM portfolio.

This device belongs to Infineon's high-performance memory product line, engineered specifically for deterministic-latency, high-throughput applications in networking infrastructure, data center accelerators, and real-time financial systems.

FAQ

What is the function of the DOFF pin on CY7C2264XV18?

The DOFF (Data-Off) pin configures read latency mode: when asserted HIGH, it enables 2.5-cycle latency for QDR II+ Xtreme operation; 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 the ODT feature work and what external components does it replace?

ODT provides programmable on-die termination for D[35:0], BWS[3:0], and K/K inputs using an external ZQ resistor (175–350 Ω) tied to the ZQ pin. With ODT enabled, it replaces up to 28 discrete 50 Ω surface-mount termination resistors, reducing PCB area, BOM count, and signal reflection at 450 MHz.

Can CY7C2264XV18 operate with a single-ended clock instead of differential K/K?

No. The device requires true differential K and K clock inputs-both must be driven with complementary HSTL signals. Single-ended clocking violates AC timing specifications and disables proper DDR edge alignment; the internal PLL and echo clock generation depend on differential clock integrity.

What is the role of the QVLD signal and how is it timed relative to data output?

QVLD is an active-high pulse that indicates valid data on Q[35:0]. It is edge-aligned to the rising edges of CQ and CQ echo clocks-not to K/K-and asserts one cycle before valid data appears, providing unambiguous setup/hold reference for downstream capture logic in FPGAs or ASICs.