Infineon Technologies CY7C1313CV18-250BZI

Overview

CY7C1313CV18 from Cypress Semiconductor is a 1M × 18-bit, 18-Mbit QDR-II SRAM with separate read/write ports, 250 MHz operation (400 ps clock period), DDR interfaces on both ports enabling 500 MT/s effective data rate, and DLL-enabled 1.5-cycle read latency. It serves as high-bandwidth buffer memory in network packet processors and FPGA-based protocol accelerators requiring concurrent access.

For engineers reviewing the CY7C1313CV18 datasheet, CY7C1313CV18 pinout, CY7C1313CV18 application, or CY7C1313CV18 equivalent, key selection criteria include its 1M×18 configuration, 165-ball FBGA package, dual-clock DDR timing (K/K and C/C), echo clocks (CQ/CQ), and HSTL-18 I/O compatibility for backplane-adjacent memory subsystems.

Technical Context

The CY7C1313CV18 implements QDR-II architecture with fully independent read and write pipelines, each synchronized to dedicated rising-edge-triggered clocks (K/K for inputs, C/C for outputs). Its internal 256K × 18 memory array is accessed via multiplexed 18-bit address bus latched on alternating K-clock edges.

It supports synchronous self-timed writes with byte-level write enables (BWS[1:0]), delivers burst-4 sequential 18-bit words per access, and uses echo clocks CQ/CQ referenced to C/C to compensate for board trace skew - critical for deterministic setup/hold timing at 500 MT/s.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm footprint, 1.4 mm height, 0.8 mm ball pitch, JEDEC MO-245 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and IS61WV102418BLL-10BLI, the CY7C1313CV18 uniquely delivers 500 MT/s DDR throughput with deterministic 1.5-cycle latency and echo-clock-assisted capture - essential for real-time packet forwarding and baseband processing where timing closure dominates PCB layout effort.

Availability

CY7C1313CV18 is available at Aetrix Electronics and suitable for network packet buffers, FPGA-based protocol accelerators, telecom baseband processing, and high-speed test equipment requiring stable component supply and long-term industrial availability.

Supply support for CY7C1313CV18 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 communications, industrial, and automotive systems, with emphasis on signal integrity and timing precision.

The QDR-II SRAM product line targets high-throughput, low-latency memory subsystems in networking and signal processing applications where concurrent read/write access and deterministic timing are mandatory.

FAQ

What is the function of the ZQ pin on CY7C1313CV18?

The ZQ pin calibrates output driver impedance to match the system data bus. When connected to a 240 Ω resistor to ground, it sets CQ, CQ, and Q[17:0] output impedance to 48 Ω (0.2 × RQ). Direct connection to VDDQ enables minimum impedance mode; floating or grounding ZQ is prohibited and causes undefined behavior.

Can CY7C1313CV18 operate without the Delay Lock Loop (DLL)?

Yes - asserting DOFF low disables the DLL, reverting the device to QDR-I timing with 1-cycle read latency and maximum frequency reduced to 167 MHz. This mode sacrifices bandwidth for simplified timing closure in less demanding applications, but all DDR functionality remains active.

How are address inputs handled for read and write operations?

A[17:0] is a single multiplexed address bus used for both read and write ports. Addresses are latched on alternating rising edges of the K clock: even cycles latch read addresses, odd cycles latch write addresses. RPS and WPS independently enable port activity without affecting address capture timing.

What is the purpose of CQ and CQ echo clocks?

CQ and CQ are free-running output clocks synchronized to C and C, respectively. They provide a local timing reference at the memory device's output pins, allowing the receiving controller to align its capture strobes with actual data flight time - critical for maintaining setup/hold margins across varying PCB trace lengths and temperatures.