Infineon Technologies CY7C2245KV18-450BZXI

Overview

CY7C2245KV18-450BZXI from Infineon Technologies (formerly Cypress) is a 36-Mbit QDR® II+ SRAM with separate read/write ports, 450 MHz clock frequency, 2.0-cycle read latency (DOFF = HIGH), on-die termination (ODT), and HSTL I/O interfaces. It delivers 900 MT/s data rate via DDR read/write ports in a 1M × 36 configuration and is used in high-bandwidth networking line cards and packet buffering systems.

For engineers reviewing the CY7C2245KV18-450BZXI datasheet, CY7C2245KV18-450BZXI pinout, CY7C2245KV18-450BZXI application, or CY7C2245KV18-450BZXI equivalent, key selection criteria include burst depth (four-word), ODT support for D/BWS/K inputs, echo clock (CQ/CQ) timing alignment, QVLD validity signaling, and 165-ball FBGA package compatibility with high-speed PCB routing constraints.

Technical Context

The device implements a synchronous pipelined architecture with independent read and write ports sharing a multiplexed 18-bit address bus. Each port uses rising edges of complementary K/K clocks for DDR data transfer, enabling concurrent read and write operations without bus turnaround.

It integrates a PLL for precise data placement, supports programmable ODT ranges via ZQ/ODT pins, and provides edge-aligned QVLD to indicate valid output data synchronized to CQ/CQ echo clocks - critical for reliable capture in 900 MHz DDR 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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2245KV18-450BZXI, the -400BZXI offers identical functionality at reduced speed and power, while AS7C33640B-166BIN lacks concurrent access, DDR, and timing aids - making it unsuitable for high-throughput data-path buffering where QDR II+ architecture is essential.

Availability

CY7C2245KV18-450BZXI is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, high-speed switch fabric interface, and ATE data capture requiring stable component supply across long-lifecycle deployments.

Supply support for CY7C2245KV18-450BZXI 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 is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, industrial, and memory solutions with strong focus on reliability and industrial longevity.

This device belongs to Infineon's QDR® II+ SRAM product line, designed specifically for high-bandwidth, low-latency data-path buffering in networking, telecom, and test equipment where concurrent read/write and deterministic timing are mandatory.

FAQ

What is the function of the DOFF pin on CY7C2245KV18-450BZXI?

The DOFF (Data Output OFF) pin configures read latency mode: when asserted HIGH, it enables 2.0-cycle read latency consistent with QDR II+ specification; when LOW or tied to VSS, the device operates in QDR I mode with 1.0-cycle latency. This pin is sampled at power-up and remains latched during operation - no runtime reconfiguration is supported.

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

ODT applies programmable termination resistance to D[35:0], BWS[3:0], and K/K inputs using an external resistor (RQ) connected to the ZQ pin. ODT pin state selects termination range: LOW → RQ/3.33 (175–350 Ω), HIGH → RQ/1.66 (175–250 Ω). This eliminates discrete termination resistors and improves signal integrity at 450 MHz without board-level tuning.

Can CY7C2245KV18-450BZXI operate with 1.5 V VDDQ?

Yes - the device supports VDDQ from 1.4 V to 1.8 V, explicitly including 1.5 V operation. HSTL-compatible I/O buffers are fully characterized at 1.5 V, enabling interoperability with 1.5 V FPGA I/O banks while maintaining full 450 MHz performance and timing margins per datasheet AC specifications.

What is the purpose of CQ and CQ echo clocks?

CQ and CQ are free-running, K/K-synchronized output clocks provided to simplify data capture in high-speed receivers. They replicate the phase and jitter profile of the input clocks, allowing the receiving device to sample Q[35:0] and QVLD using locally generated clocks - eliminating skew between clock and data paths and relaxing PCB routing constraints in 900 MT/s systems.