Cypress Semiconductor Corp CY7C2270KV18-550BZXI

Overview

CY7C2270KV18 from Infineon Technologies (formerly Cypress) is a 36-Mbit synchronous pipelined DDR II+ SRAM configured as 1M × 36, operating at 550 MHz with 2.5-cycle read latency when DOFF = HIGH, supporting 1100 MT/s data transfer via double-data-rate interface, and featuring on-die termination (ODT), echo clocks (CQ/CQ), and QVLD for precise high-speed memory interfacing in networking line cards.

For engineers reviewing the CY7C2270KV18 datasheet, CY7C2270KV18 pinout, CY7C2270KV18 application, or CY7C2270KV18 equivalent, key selection considerations include its 1M × 36 organization, HSTL I/O compatibility, 1.8 V core / 1.4–1.8 V I/O supply range, PLL-based timing accuracy, and FBGA-165 package constraints for dense PCB layouts.

Technical Context

This device implements a two-word burst architecture with synchronous pipelined addressing: addresses are latched on alternate rising edges of K/K, while write data is registered on both K and K rising edges. Read data is driven on both clock edges with strict alignment to echo clocks CQ/CQ and validated by QVLD.

The DDR II+ architecture supports dual latency modes-2.5-cycle (DOFF = HIGH) and 1-cycle (DOFF = LOW)-and integrates ODT for D[35:0], BWS[3:0], and K/K inputs, eliminating external termination resistors. Core logic uses a PLL for accurate data placement and relies on ZQ calibration for output impedance matching (0.2 × RQ).

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2268KV18, CY7C2270KV18 delivers identical performance in a single 36-bit package, avoiding inter-device skew; versus AS7C362000B-15JIN, it provides superior signal integrity features (ODT, QVLD, CQ/CQ) essential for >500 MHz system integration.

Availability

CY7C2270KV18 is available at Aetrix Electronics and suitable for high-speed network line cards, telecom packet buffers, ATE pattern memory, and industrial real-time controllers requiring stable component supply, long-term lifecycle support, and guaranteed Pb-free compliance.

Supply support for CY7C2270KV18 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 the full legacy SRAM portfolio, including DDR II+ and QDR families, with global manufacturing, quality systems, and long-term product support.

CY7C2270KV18 belongs to Infineon's high-performance synchronous SRAM product line, engineered specifically for deterministic, low-jitter memory interfacing in infrastructure equipment where bandwidth, timing precision, and signal integrity are critical.

FAQ

What is the function of the DOFF pin on CY7C2270KV18?

The DOFF (Data Output OFF) pin selects read latency mode: when asserted HIGH, the device operates in DDR II+ mode with 2.5-cycle read latency; when LOW or tied to VSS, it reverts to DDR I mode with 1-cycle latency. This is a static configuration pin sampled at power-up and must remain stable during operation to avoid timing violations.

How does on-die termination (ODT) work on CY7C2270KV18?

ODT is enabled via the ODT pin and calibrated using the external ZQ resistor. 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[35:0], BWS[3:0], and K/K inputs, eliminating need for discrete termination resistors and improving signal integrity at 550 MHz.

Can CY7C2270KV18 be used with a 1.5 V I/O supply?

Yes - VDDQ supports 1.4 V to 1.8 V, explicitly including 1.5 V operation. The device's HSTL-compatible I/O buffers are designed for this range, and DC/AC specifications in the datasheet (Rev. *I) are validated down to 1.4 V, ensuring reliable interface with 1.5 V FPGA or ASIC I/O banks.

What is the role of the QVLD signal in system timing?

QVLD is a synchronous output that pulses high in alignment with CQ and CQ edges to indicate exactly when DQ[35:0] data is valid. It eliminates guesswork in capture timing, allowing receivers to latch data on the same clock edge that asserts QVLD - critical for robust operation across temperature, voltage, and process corners in high-speed systems.