Infineon Technologies CY7C1565XV18-600BZXC

Overview

CY7C1565XV18 from Infineon Technologies (formerly Cypress) is a 2M × 36, 72-Mbit QDR® II+ Xtreme SRAM with separate read/write ports, 600 MHz clock operation (1200 MT/s DDR), 2.5-cycle read latency, and HSTL I/O interfaces. It delivers high-bandwidth memory for network packet buffering in telecom line cards and FPGA co-processor caches requiring deterministic low-latency access.

For engineers reviewing the CY7C1565XV18 datasheet, CY7C1565XV18 pinout, CY7C1565XV18 application, or CY7C1565XV18 equivalent, key selection criteria include burst depth (4-word), DOFF-configurable latency mode (QDR I vs. QDR II+), echo clock timing (CQ/CQ), QVLD data validity signaling, and 165-ball FBGA package compatibility with high-speed PCB layout constraints.

Technical Context

This SRAM implements true dual-port synchronous architecture: independent K and K clocks drive read and write operations on shared address bus A[18:0], enabling concurrent transactions without bus turnaround. The internal PLL synchronizes CQ/CQ echo clocks to K/K for precise DDR data capture at system level.

It supports byte-selectable writes via BWS[3:0] (CY7C1565XV18), full data coherency across bursts, and programmable output impedance via ZQ pin tied to external resistor. Core VDD = 1.8 V ± 0.1 V; I/O VDDQ = 1.4–1.6 V enables 1.5 V interface compatibility.

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 finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and IS61QW25636A-600BQI, CY7C1565XV18 uniquely combines 72-Mbit density, DOFF-configurable latency mode, and integrated JTAG - making it optimal for legacy-compatible telecom upgrades requiring both performance headroom and debug flexibility.

Availability

CY7C1565XV18 is available at Aetrix Electronics and suitable for network packet buffering, FPGA co-processor caching, and telecom baseband processing requiring stable component supply across extended product lifecycles.

Supply support for CY7C1565XV18 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, sensor, and memory solutions for industrial, automotive, and communications markets.

CY7C1565XV18 belongs to the QDR® II+ Xtreme SRAM product line, designed specifically for high-speed networking infrastructure where deterministic latency, concurrent access, and signal integrity at multi-GHz data rates are critical.

FAQ

What is the function of the DOFF pin, and how does it affect timing?

The DOFF pin disables the internal PLL when asserted LOW, forcing the device into QDR I mode with 1-cycle read latency and maximum clock frequency of 167 MHz. In normal operation (DOFF HIGH), the PLL enables 2.5-cycle latency at up to 600 MHz. Timing parameters differ significantly between modes - QDR I mode uses different setup/hold windows and eliminates echo clock generation.

How does the ZQ pin calibrate output impedance, and what resistor value is required?

ZQ connects to an external resistor (RQ) tied to ground; the device measures RQ and sets CQ, CQ, and Q[35:0] output impedance to 0.2 × RQ. For standard 50 Ω trace matching, use RQ = 250 Ω. Alternatively, tying ZQ to VDDQ enables minimum output drive strength - useful for short traces or reduced EMI requirements.

Can CY7C1565XV18 be used in depth-expanded configurations, and how is port selection handled?

Yes - depth expansion is supported using RPS and WPS signals. Each device in a stack uses unique RPS/WPS assertions to enable its read/write ports independently. Address bus A[18:0] remains common; higher-order bits are decoded externally. This allows building larger memory arrays (e.g., 4M × 36) while preserving per-device burst timing and latency.

What is the role of QVLD, and how does it relate to CQ and CQ timing?

QVLD is a synchronous output that asserts coincident with valid data on Q[35:0]. It is edge-aligned to both CQ and CQ echo clocks - meaning its rising/falling edges occur simultaneously with those clocks' transitions. This provides a hardware-strobed validity signal that eliminates receiver-side timing uncertainty when capturing DDR data at 600 MHz.