Infineon Technologies CY7C2562XV18-450BZXC

Overview

CY7C2562XV18 from Cypress Semiconductor is a 72-Mbit QDR® II+ Xtreme SRAM with two-word burst 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 Mbps effective data rate), uses 1.8 V core supply and 1.5 V I/O supply, and is packaged in a 165-ball FBGA (13 × 15 × 1.4 mm) for high-speed networking line cards requiring deterministic low-latency memory access.

For engineers reviewing the CY7C2562XV18 datasheet, CY7C2562XV18 pinout, CY7C2562XV18 application, or CY7C2562XV18 equivalent, this device delivers concurrent read/write throughput without bus turnaround, supports depth expansion via RPS/WPS control, and integrates echo clocks (CQ/CQ) and QVLD for reliable high-speed data capture in packet buffering and switching fabric designs.

Technical Context

The CY7C2562XV18 implements a synchronous pipelined QDR II+ architecture with physically separate read and write data paths-D[17:0] inputs and Q[17:0] outputs-enabling true concurrent transactions. Its dual-clock interface (K/K) drives all synchronous inputs on rising edges only, while echo clocks CQ/CQ align with output data timing to simplify receiver design.

It features a PLL for precise data placement, programmable ODT on D[17:0], BWS[1:0], and K/K inputs, and configurable read latency (2.5 cycles when DOFF = HIGH; 1 cycle when DOFF = LOW). The 4M × 18 organization uses 21 address bits latched alternately on K and K edges, eliminating address bus duplication.

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 only.

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 IS61WV102418BLL-15BLI, the CY7C2562XV18 delivers 2.7× higher bandwidth, integrated signal integrity features (ODT, echo clocks, QVLD), and deterministic 2.5-cycle latency-making it uniquely suited for next-generation packet processing and high-speed instrumentation where timing predictability is critical.

Availability

CY7C2562XV18 is available at Aetrix Electronics and suitable for packet buffering in network switches, line card memory for 10G/25G Ethernet, and real-time signal processing buffers requiring stable component supply across extended temperature and long product lifecycles.

Supply support for CY7C2562XV18 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+ Xtreme SRAM product line was designed specifically for high-speed networking and test equipment requiring deterministic latency, concurrent access, and robust signal integrity at frequencies beyond conventional DDR memory limits.

FAQ

What is the function of the DOFF pin on CY7C2562XV18?

The DOFF (Disable Off) pin configures the device's read latency mode. When asserted HIGH, it enables QDR II+ mode with 2.5-cycle read latency and full burst functionality. When tied LOW or to VSS, the device operates in backward-compatible QDR I mode with 1-cycle read latency. This pin is sampled during power-up initialization and remains static during operation.

How does On-Die Termination (ODT) work on CY7C2562XV18?

ODT is enabled via the ODT pin and calibrated using an external precision resistor (RQ) connected to the ZQ pin. A LOW on ODT selects RQ/3.33 termination (≈175–350 Ω range); HIGH selects RQ/1.66 (≈175–250 Ω). ODT applies to D[17:0], BWS[1:0], and K/K inputs, eliminating the need for eight discrete 50-Ω resistors and improving impedance matching at 450 MHz.

Can CY7C2562XV18 be used in depth-expanded configurations?

Yes. Depth expansion is supported using RPS (Read Port Select) and WPS (Write Port Select) pins. Multiple devices can be stacked with shared address, clock, and data buses while using individual RPS/WPS lines to enable specific devices per transaction. This allows seamless scaling from 4M × 18 to larger capacities without external multiplexing logic.

What is the role of CQ and CQ echo clocks?

CQ and CQ are free-running, source-synchronous echo clocks derived from K and K respectively. They are edge-aligned with Q[17:0] output data and QVLD, enabling receivers to latch data with zero skew. Unlike forwarded clocks in other protocols, CQ/CQ require no phase adjustment and directly replace complex delay-locked loops in high-speed FPGA capture logic.