Infineon Technologies CY7C1565KV18-500BZC

Overview

CY7C1565KV18-500BZC from Cypress Semiconductor is a 72-Mbit QDR® II+ SRAM with 2M × 36 organization, four-word burst architecture, and 2.5-cycle read latency at 500 MHz. It features separate read/write ports, DDR interfaces on both ports (1000 Mbps effective data rate), 1.8-V core supply, and 1.4–1.8-V I/O supply. Used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C1565KV18-500BZC datasheet, CY7C1565KV18-500BZC pinout, CY7C1565KV18-500BZC application, or CY7C1565KV18-500BZC equivalent, key selection criteria include concurrent read/write capability, echo clock timing support (CQ/CQ), QVLD data validity signaling, and PLL-enabled 2.5-cycle latency mode for deterministic high-speed memory access.

Technical Context

The CY7C1565KV18-500BZC implements a true dual-port synchronous SRAM architecture with physically independent read and write data paths-no bus turnaround required. Its QDR II+ core uses two input clocks (K and K) for precise DDR edge alignment and embeds a PLL to enable accurate data placement at 500 MHz.

Each transaction delivers four sequential 36-bit words per port, latched on alternating rising edges of K/K. The device supports depth expansion via RPS/WPS and byte-level write control via BWS[3:0], ensuring full data coherency and deterministic latency regardless of concurrent operation state.

Key Specifications

Pinout & Package

Package: 165-ball fine-pitch ball grid array (FBGA), 13 mm × 15 mm × 1.4 mm body, RoHS-compliant, with 0.8-mm ball pitch and standard HSTL-compatible I/O layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36120L10BG and IS61WV102436B, CY7C1565KV18-500BZC uniquely delivers guaranteed 2.5-cycle latency with integrated PLL, echo clocks, and QVLD-reducing FPGA logic overhead and PCB routing complexity in high-speed networking designs.

Availability

CY7C1565KV18-500BZC is available at Aetrix Electronics and suitable for network switch fabric design, high-speed test instrumentation, and telecom baseband processing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY7C1565KV18-500BZC 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) designs high-performance memory and programmable solutions for demanding embedded and communications systems, with focus on reliability, speed, and integration.

CY7C1565KV18 belongs to Cypress's QDR II+ SRAM product line, engineered specifically for deterministic, low-latency, high-throughput memory interfacing in packet-switched infrastructure and real-time signal processing platforms.

FAQ

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

The DOFF pin disables the internal PLL when pulled LOW, reverting the device to QDR I mode with 1-cycle read latency and a maximum operating frequency of 167 MHz. When HIGH, the PLL enables 2.5-cycle latency operation at up to 500 MHz. This pin allows runtime mode switching between high-speed and low-power configurations without changing external clock sources.

How does the ZQ pin configure output drive strength?

The ZQ pin connects to an external resistor (RQ) tied to ground, enabling automatic calibration of Q[35:0], CQ, and CQ output impedance to 0.2 × RQ. For example, a 250-Ω resistor sets output impedance to 50 Ω. Alternatively, tying ZQ to VDDQ enables minimum impedance mode-useful for short-trace, low-capacitance interconnects where stronger drive is needed.

Can CY7C1565KV18-500BZC support depth expansion, and how is it implemented?

Yes-depth expansion is supported using RPS and WPS signals. Multiple devices can be stacked vertically by connecting shared address, clock, and data buses while assigning unique RPS/WPS lines per device. Each RPS/WPS pair enables independent read/write activation, allowing seamless extension beyond 2M × 36 without external multiplexing logic.

What is the role of QVLD, and why is it critical for system timing?

QVLD is an edge-aligned output that pulses high only during valid Q[35:0] data periods within a burst. Unlike fixed-delay sampling, QVLD eliminates setup/hold uncertainty in high-speed receivers-especially in FPGAs-by providing a hardware-synchronized strobe. This reduces timing margin requirements and improves robustness across voltage/temperature variations.