Cypress Semiconductor Corp CY7C2265KV18-400BZXI

Overview

CY7C2265KV18 from Cypress Semiconductor is a 1 M × 36, 36-Mbit QDR® II+ SRAM with 4-word burst architecture, 2.5-cycle read latency, and on-die termination (ODT). It operates at 400 MHz (2.5 ns clock period), supports DDR interfaces on both read and write ports (800 Mbps effective data rate), and uses 1.8 V core / 1.4–1.8 V I/O supply. It serves as high-bandwidth buffer memory in network packet processors and FPGA-based protocol acceleration engines.

For engineers reviewing the CY7C2265KV18 datasheet, CY7C2265KV18 pinout, CY7C2265KV18 application, or CY7C2265KV18 equivalent, key selection criteria include its 1 M × 36 organization, 400 MHz maximum frequency, ODT support for D[35:0]/BWS[3:0]/K/K inputs, echo clocks (CQ/CQ) for timing margin, and JTAG 1149.1 compliance for boundary scan testability.

Technical Context

The CY7C2265KV18 implements a true dual-port synchronous SRAM architecture with physically separate read and write data paths-no bus turnaround required. Its 256K × 36 memory array is organized across four internal banks, accessed via a shared 18-bit address bus latched on alternating edges of K and K clocks.

It integrates a PLL for precise data placement, echo clocks synchronized to K/K for receiver timing alignment, and programmable ODT with two impedance ranges selected by the ODT pin. The QVLD signal provides edge-aligned valid-data indication, and depth expansion is enabled via independent RPS/WPS controls.

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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and IS61WV102436B, CY7C2265KV18 delivers 60% higher bandwidth, eliminates 76 external resistors via ODT, and enables robust 400 MHz operation through echo clocks and QVLD-making it the sole choice for new 10+ GbE and 5G infrastructure designs.

Availability

CY7C2265KV18 is available at Aetrix Electronics and suitable for network packet processors, FPGA-based protocol accelerators, telecom baseband units, and high-speed test equipment requiring stable component supply across multi-year production cycles.

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 U.S.-based 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-bandwidth buffering in packet-switched networks and real-time signal processing systems.

FAQ

What is the function of the DOFF pin on CY7C2265KV18?

The DOFF (Data-Off) pin configures read latency mode: when asserted HIGH, it enables 2.5-cycle read latency for optimal QDR II+ performance; when LOW, it reverts to 1-cycle latency compatible with legacy QDR I timing. This pin is sampled at power-up and must be held stable during initialization to avoid undefined behavior.

Can CY7C2265KV18 operate with VDDQ = 1.5 V while VDD = 1.8 V?

Yes. The device supports VDDQ from 1.4 V to VDD (1.8 V), including 1.5 V. At 1.5 V VDDQ, HSTL Class I output drive strength is maintained, and AC timing parameters remain within spec-verified in Cypress's DC/AC Electrical Characteristics table (Rev. *L, p.21–23).

How does the ZQ pin calibrate output impedance?

ZQ connects to a precision external resistor (typically 240 Ω) to ground. During power-up, the device measures this resistance and sets CQ, CQ, and Q[35:0] output drivers to 0.2 × RQ (e.g., 48 Ω for 240 Ω). Direct connection to VDDQ enables minimum impedance mode (~25 Ω); grounding or leaving unconnected is prohibited.

Is CY7C2265KV18 pin-compatible with CY7C2263KV18?

No. Although both use the same 165-ball FBGA package, pin assignments differ significantly: CY7C2263KV18 (2 M × 18) uses 19 address bits and BWS[1:0], while CY7C2265KV18 (1 M × 36) uses 18 address bits and BWS[3:0]. Signal mapping for D/Q, BWS, and internal bank selects is not interchangeable.