Cypress Semiconductor Corp CY7C2265XV18-633BZXC

Overview

CY7C2265XV18 from Infineon Technologies (formerly Cypress) is a 1 M × 36, 36-Mbit QDR® II+ Xtreme SRAM with 2.5-cycle read latency, 633 MHz clock operation, and on-die termination (ODT). It features separate read/write DDR ports, echo clocks (CQ/CQ), QVLD data-valid indicator, and operates at 1.8 V core / 1.5 V I/O supply. Used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C2265XV18 datasheet, CY7C2265XV18 pinout, CY7C2265XV18 application, or CY7C2265XV18 equivalent, key selection criteria include 1 M × 36 configuration, 633 MHz maximum frequency, HSTL I/O compatibility, 165-ball FBGA package, and ODT support for D[35:0], BWS[3:0], and K/K inputs.

Technical Context

This SRAM implements QDR II+ architecture with fully independent synchronous read and write ports, each using DDR interfaces to achieve 1266 MT/s effective data rate. Address latching occurs on alternating rising edges of K and K clocks, enabling four-word burst transfers per access without bus turnaround.

The device integrates a PLL for precise data placement, supports programmable ODT via ZQ calibration and ODT pin selection, and provides echo clocks synchronized to K/K for simplified high-speed capture. DOFF pin configures read latency between 2.5 cycles (HIGH) and 1 cycle (LOW), maintaining functional compatibility with legacy QDR I systems.

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 construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2265XV18, CY7C2263XV18 offers identical performance in a ×18 format ideal for width-constrained controllers, while AS7C33600B-166BIN trades off 7.6× lower bandwidth and no advanced features for simpler interface and lower unit cost in legacy systems.

Availability

CY7C2265XV18 is available at Aetrix Electronics and suitable for network switching, high-speed test instrumentation, and telecom baseband processing requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for CY7C2265XV18 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, documentation, and support for the QDR® II+ Xtreme SRAM family.

CY7C2265XV18 belongs to Infineon's high-performance memory portfolio designed specifically for deterministic, low-latency, high-throughput buffering in networking, test, and communications infrastructure.

FAQ

What is the function of the DOFF pin on CY7C2265XV18?

The DOFF (Data-Off) pin selects read latency mode: when asserted HIGH, it enables 2.5-cycle latency for optimal QDR II+ performance; when LOW, it reverts to 1-cycle latency for QDR I compatibility. This is a static configuration pin sampled at power-up and does not require dynamic control during operation.

How does On-Die Termination (ODT) work on CY7C2265XV18?

ODT is configured using the ODT pin and an external ZQ resistor (typically 240 Ω to ground). The ODT pin selects between two impedance ranges: HIGH enables RQ/1.66 (~144 Ω), LOW enables RQ/3.33 (~72 Ω). ODT applies to D[35:0], BWS[3:0], and K/K inputs, eliminating need for external parallel termination resistors.

Can CY7C2265XV18 operate with a single-ended clock instead of differential K/K?

No - the device requires true differential K and K clock inputs. Both signals must be driven with complementary waveforms; tying K to ground or VDD violates AC timing specifications and disables proper input sampling. External clock generators or FPGA transceivers must provide matched, low-skew differential pairs.

What is the role of QVLD and how is it timed relative to CQ/CQ?

QVLD is a synchronous output that asserts one cycle before the first valid data word appears on Q[35:0] in a read burst. It is edge-aligned with CQ and CQ, providing a clean, clock-synchronous strobe for capturing Q[35:0] in receiving logic - essential for reliable DDR data recovery at 633 MHz.