Infineon Technologies CY7C1265XV18-600BZXC

Overview

CY7C1265XV18 from Infineon Technologies (formerly Cypress) is a 1 M × 36, 36-Mbit QDR® II+ Xtreme SRAM with separate read/write ports, 2.5-cycle read latency, 600 MHz clock operation, and DDR interfaces delivering 1200 MT/s effective data rate. It supports concurrent transactions in high-bandwidth networking buffers and packet classification engines.

For engineers reviewing the CY7C1265XV18 datasheet, CY7C1265XV18 pinout, CY7C1265XV18 application, or CY7C1265XV18 equivalent, key selection criteria include burst depth, DOFF-configurable latency mode, HSTL I/O compatibility, echo clock timing margining, and 165-ball FBGA mechanical fit for dense routing.

Technical Context

This SRAM implements QDR II+ architecture with fully independent synchronous read and write ports sharing a multiplexed address bus. Each port uses rising edges of complementary K/K clocks for DDR data transfer, enabling true simultaneous access without bus turnaround.

The integrated PLL enables precise 2.5-cycle read latency at 600 MHz; when DOFF is asserted LOW, it reverts to QDR I mode (1-cycle latency, ≤167 MHz). Echo clocks CQ/CQ align with output data edges to simplify capture in FPGA-based systems.

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 construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C362000B-15JIN and IS61WV102432BLL-10TLI, CY7C1265XV18 delivers 4.3 GB/s bandwidth and true concurrent access-enabling real-time packet processing unattainable with asynchronous SRAMs-while its DOFF pin and echo clocks provide unique flexibility for mixed-timing-system integration.

Availability

CY7C1265XV18 is available at Aetrix Electronics and suitable for high-speed network switch buffers, telecom line card packet memory, and 5G baseband processing requiring stable component supply and long-term lifecycle assurance.

Supply support for CY7C1265XV18 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, sensing, connectivity, and memory solutions for automotive, industrial, and communications markets.

This device belongs to Infineon's QDR® II+ Xtreme SRAM product line, engineered specifically for deterministic-latency, high-throughput memory subsystems in next-generation networking and wireless infrastructure equipment.

FAQ

What is the function of the DOFF pin on CY7C1265XV18?

The DOFF (PLL Turn Off) pin is an active-LOW control that disables the internal PLL. When grounded, the device operates in QDR I mode with 1-cycle read latency and a maximum frequency of 167 MHz. For normal QDR II+ operation at 600 MHz with 2.5-cycle latency, DOFF must be pulled HIGH via a ≤10 kΩ resistor to VDDQ. This pin enables hardware-selectable timing modes without firmware changes.

How does the ZQ pin affect signal integrity?

The ZQ pin calibrates output driver impedance by referencing an external 240 Ω resistor to ground, setting CQ, CQ, and Q[35:0] output impedance to 60 Ω (0.2 × 240 Ω). This matches standard PCB trace impedances, minimizing reflections and ensuring clean eye diagrams at 1200 MT/s. Connecting ZQ directly to VDDQ enables minimum impedance mode (≈30 Ω), useful for short-trace, low-capacitance interconnects.

Can CY7C1265XV18 support partial writes without read-modify-write?

Yes. The device supports true byte-selectable writes via four active-LOW BWS[3:0] signals. BWS0 controls D[8:0], BWS1 controls D[17:9], BWS2 controls D[26:18], and BWS3 controls D[35:27]. When a BWS signal is deasserted, the corresponding 9-bit byte lane is ignored during the write cycle, preserving existing data in those bits - eliminating need for external read-modify-write logic.

What is the role of CQ and CQ echo clocks in system timing?

CQ and CQ are free-running, edge-aligned echo clocks synchronized to the input K and K clocks. They replicate the timing relationship between K/K and Q[35:0] outputs, allowing FPGA or ASIC receivers to use CQ/CQ as capture clocks instead of K/K. This eliminates setup/hold timing violations caused by clock skew between K/K and Q[35:0], enabling reliable data capture at 1200 MT/s without complex deskew circuitry.