Infineon Technologies CY7C2265KV18-550BZXC

Overview

CY7C2265KV18 from Cypress Semiconductor is a 1 M × 36, 36-Mbit QDR® II+ SRAM with 2.5-cycle read latency, 550 MHz clock frequency, DDR interfaces on both ports (1100 MT/s effective data rate), and on-die termination (ODT) for D[35:0], BWS[3:0], and K/K inputs-designed for high-bandwidth packet buffering in network line cards and switch fabric controllers.

For engineers reviewing the CY7C2265KV18 datasheet, CY7C2265KV18 pinout, CY7C2265KV18 application, or CY7C2265KV18 equivalent, key selection criteria include its 1.8 V core / 1.4–1.8 V I/O supply support, HSTL-compatible interfaces, echo clocks (CQ/CQ) for timing margin improvement, and JTAG 1149.1 test access port for production validation.

Technical Context

The CY7C2265KV18 implements a true dual-port synchronous architecture with physically separate read and write data paths-enabling concurrent read/write operations without bus turnaround. Its 256K × 36 memory array is accessed via a shared 18-bit multiplexed address bus latched on alternating edges of K and K clocks.

It integrates a PLL for precise data placement, supports programmable ODT impedance ranges (RQ/1.66 or RQ/3.33) via the ODT pin, and uses echo clocks CQ/CQ aligned to output data edges to simplify high-speed capture at 1100 MT/s. The QVLD signal provides edge-aligned valid-data indication synchronized to CQ/CQ.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, 0.8 mm ball pitch, RoHS-compliant Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar QDR II+ SRAM applications.

Compared with IDT72T3615 and IS61WV102436B, CY7C2265KV18 offers unique DOFF-configurable latency, full-pin ODT coverage, and integrated echo clocks-making it optimal for new designs requiring timing margin, testability, and flexible latency modes.

Availability

CY7C2265KV18 is available at Aetrix Electronics and suitable for network switch fabric buffering, high-speed packet processing engines, and telecom line card control memory requiring stable component supply across extended product lifecycles.

Supply support for CY7C2265KV18 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.

CY7C2265KV18 belongs to Cypress's QDR® II+ SRAM product line, engineered specifically for deterministic, low-latency, high-throughput memory subsystems in networking and test equipment where concurrent read/write bandwidth and timing precision are critical.

FAQ

What is the function of the DOFF pin on CY7C2265KV18?

The DOFF (Data-Off) pin configures read latency mode: when asserted HIGH, the device operates with 2.5-cycle read latency; when asserted LOW, it reverts to 1-cycle latency like QDR I. This allows system-level optimization of timing margin versus latency trade-offs without hardware changes.

How does the ZQ pin affect output driver impedance?

The ZQ pin connects to an external resistor to ground (RQ), calibrating output driver impedance to 0.2 × RQ for Q[35:0], CQ, and CQ. If tied directly to VDDQ, minimum impedance mode activates. ZQ must never be left floating or connected to GND, as that disables calibration and risks signal integrity failure.

Can CY7C2265KV18 operate with only one clock input (K) instead of K/K differential pair?

No. The device requires both K and K inputs for proper DDR timing: K controls read port timing and RPS/WPS sampling, while K controls write data and BWS sampling. Using only K violates AC timing specifications and causes undefined behavior in burst sequencing and echo clock generation.

Is the CY7C2265KV18 pin-compatible with CY7C2263KV18?

No. Although both use the same 165-ball FBGA package, their pinouts differ significantly: CY7C2263KV18 (2 M × 18) has 19 address lines and two BWS pins, while CY7C2265KV18 (1 M × 36) uses 18 address lines and four BWS pins, with distinct D/Q and control signal allocations per ball map.