Infineon Technologies CY7C2665KV18-450BZI

Overview

CY7C2665KV18 from Infineon Technologies (formerly Cypress) is a 4M × 36, 144-Mbit QDR® II+ SRAM with quad data rate architecture, 2.5-cycle read latency, 450 MHz clock operation, and on-die termination (ODT). It delivers 1100 MT/s effective data rate via DDR interfaces on independent read/write ports, supporting high-bandwidth packet buffering in network line cards and telecom switching fabric.

For engineers reviewing the CY7C2665KV18 datasheet, CY7C2665KV18 pinout, CY7C2665KV18 application, or CY7C2665KV18 equivalent, key selection criteria include its 450 MHz maximum frequency, 1.8 V core / 1.4–1.8 V I/O supply range, 165-ball FBGA package, ODT support for D[35:0]/BWS[3:0]/K/K inputs, and JTAG 1149.1 test access compliance.

Technical Context

This device implements a synchronous pipelined SRAM architecture with physically separate read and write data paths-eliminating bus turnaround overhead. Its four-word burst transfers per address cycle reduce address bus frequency while maintaining full coherency across concurrent transactions.

The integrated PLL synchronizes echo clocks (CQ/CQ) to input clocks (K/K), enabling precise DDR timing capture at 450 MHz. ODT is configurable via the ZQ pin and ODT pin, supporting two impedance ranges (175–350 Ω low range, 175–250 Ω high range) for D, BWS, and clock inputs.

Key Specifications

Pinout & Package

Package: 165-ball fine-pitch ball grid array (FBGA), 15 mm × 17 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 AS7C3256A-15JCIN and IS61WV102416BLL-10TLI, CY7C2665KV18 uniquely delivers concurrent 450 MHz DDR read/write throughput, on-die termination, and echo-clock–assisted timing closure-making it irreplaceable in high-speed networking and test instrumentation where bus turnaround elimination and sub-cycle latency are mandatory.

Availability

CY7C2665KV18 is available at Aetrix Electronics and suitable for network line cards, telecom switch fabric, high-speed test equipment, and industrial real-time controllers requiring stable component supply across extended product lifecycles.

Supply support for CY7C2665KV18 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 MCUs, and high-performance memory solutions.

This device belongs to Infineon's QDR® II+ SRAM product line, engineered specifically for deterministic, high-bandwidth memory interfacing in networking ASICs, FPGA-based accelerators, and real-time signal processing systems.

FAQ

What is the function of the DOFF pin on CY7C2665KV18?

The DOFF (Data Output Format) pin configures read latency mode: when asserted high, it enables 2.5-cycle latency for QDR II+ operation; when low, it reverts to 1-cycle latency compatible with legacy QDR I timing. This pin is sampled at power-up and remains static during operation-no runtime switching is supported.

Can CY7C2665KV18 operate with VDDQ = 1.4 V while VDD = 1.8 V?

Yes. The datasheet explicitly states VDDQ operates from 1.4 V to VDD, and this device supports 1.4 V I/O supply with 1.8 V core. This enables direct interface to 1.5 V HSTL-15 receivers without level translation, provided board layout maintains clean separation between VDDQ and VDD return paths.

How does the ZQ pin calibrate output impedance?

ZQ connects to an external precision resistor (RQ) tied to ground. During power-up initialization, internal circuitry measures RQ and sets output driver strength so that CQ, CQ, and Q[35:0] impedances equal 0.2 × RQ. For example, a 200 Ω RQ yields ~40 Ω output impedance-matching standard 50 Ω transmission lines with controlled overshoot.

Is CY7C2665KV18 pin-compatible with CY7C2663KV18?

No. Although both use the same 165-ball FBGA package, their pinouts differ significantly: CY7C2663KV18 (8M × 18) uses BWS[1:0] and Q[17:0], while CY7C2665KV18 (4M × 36) uses BWS[3:0] and Q[35:0]. Signal assignments for D, Q, BWS, and address bits are incompatible-requiring separate PCB layouts and firmware configuration.