Infineon Technologies CY7C2663KV18-450BZI

Overview

CY7C2663KV18 from Infineon Technologies (formerly Cypress) is a 144-Mbit QDR® II+ SRAM with 8M × 18 organization, 450 MHz maximum clock frequency, 2.5-cycle read latency, and on-die termination (ODT) supporting D[17:0], BWS[1:0], and K/K inputs. It delivers 1100 MT/s effective data rate via DDR interfaces on independent read/write ports and operates at core VDD = 1.8 V ± 0.1 V and I/O VDDQ = 1.4–1.8 V in high-speed networking line cards requiring deterministic low-latency memory access.

For engineers reviewing the CY7C2663KV18 datasheet, CY7C2663KV18 pinout, CY7C2663KV18 application, or CY7C2663KV18 equivalent, this device supports concurrent read/write transactions, four-word burst transfers, echo-clock–assisted data capture, JTAG 1149.1 boundary scan, and depth expansion via RPS/WPS - all critical for FPGA-based packet buffering and switch fabric control planes.

Technical Context

The CY7C2663KV18 implements a true quad data rate II+ architecture with physically separate read and write data paths, eliminating bus turnaround overhead. Its dual DDR interfaces operate synchronously to K and K clocks, enabling full-duplex 1100 MT/s throughput while maintaining strict timing alignment via CQ/CQ echo clocks and QVLD data-valid signaling.

Internally, it uses a 2.5-cycle pipelined read latency mode when DOFF is high and reverts to 1-cycle latency (QDR I–compatible) when DOFF is low. The PLL ensures precise data placement, and ODT is programmable via ZQ resistor and ODT pin selection between 175–350 Ω (low range) or 175–250 Ω (high range).

Key Specifications

Pinout & Package

Package: 165-ball fine-pitch ball grid array (FBGA), 15 mm × 17 mm × 1.4 mm body, RoHS-compliant, Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C2665KV18, the CY7C2663KV18 offers higher density per bit width but requires two devices for 32-bit+ buses; compared with AS7C33256PFS-15BIN, it delivers 73× higher effective bandwidth and deterministic sub-6 ns latency at the cost of tighter layout and power delivery requirements.

Availability

CY7C2663KV18 is available at Aetrix Electronics and suitable for network packet buffering, switch fabric control memory, FPGA-based protocol acceleration, and optical transport network framing requiring stable component supply across extended product lifecycles.

Supply support for CY7C2663KV18 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 former Cypress QDR SRAM portfolio.

This device belongs to Infineon's high-performance QDR II+ SRAM product line, engineered specifically for deterministic, low-latency, full-duplex memory access in carrier-grade networking and telecom infrastructure equipment.

FAQ

What is the function of the DOFF pin on CY7C2663KV18?

The DOFF (Data-Off) pin configures the device's read latency mode: when asserted high, it enables QDR II+ operation with 2.5-cycle read latency; when low, it reverts to QDR I–compatible 1-cycle latency. This pin is sampled at power-up and remains latched until reset, allowing system-level optimization between bandwidth and latency.

How does on-die termination (ODT) work on CY7C2663KV18?

ODT is enabled via the ODT pin and calibrated using an external resistor on the ZQ pin. A low ODT level selects RQ/3.33 termination (175–350 Ω range); high selects RQ/1.66 (175–250 Ω). This tunes output driver and input termination impedance to match PCB trace impedance, eliminating discrete resistors and improving signal integrity at 450 MHz.

Can CY7C2663KV18 be used with a 1.5 V VDDQ supply?

Yes - the device supports VDDQ from 1.4 V to 1.8 V, including 1.5 V. At 1.5 V, it meets all AC/DC specifications per the datasheet, and HSTL-compatible I/O buffers operate correctly. System designers must ensure stable 1.5 V regulation and verify timing margins under worst-case voltage/temperature conditions.

What is the role of CQ and CQ echo clocks?

CQ and CQ are free-running, phase-aligned copies of the K and K input clocks, respectively. They provide source-synchronous timing references for capturing Q[17:0] output data in receiving logic (e.g., FPGA IOBs), eliminating setup/hold uncertainty caused by clock skew and PCB trace mismatch in high-speed designs.