Cypress Semiconductor Corp CY7C1513AV18-250BZC

Overview

CY7C1513AV18 from Cypress Semiconductor is a 4M × 18-bit (72-Mbit), 1.8V QDR-II SRAM with separate read/write ports, 300 MHz clock support, DDR interfaces on both ports (600 Mbps effective data rate), and 165-ball FBGA package. It delivers concurrent read/write operations for high-bandwidth packet buffering in network switches and routers.

For engineers reviewing the CY7C1513AV18 datasheet, CY7C1513AV18 pinout, CY7C1513AV18 application, or CY7C1513AV18 equivalent, key selection criteria include burst depth (4-word), DLL-enabled 1.5-cycle read latency, HSTL-18 I/O compatibility, and dual-clock timing control (K/K and C/C) for skew management in multi-device memory subsystems.

Technical Context

The CY7C1513AV18 implements QDR-II architecture with fully independent read and write pipelines, each synchronized to dedicated input clocks (K/K for address/control, C/C for output timing). Its 4-word burst transfers 72-bit words per access, reducing address bus toggling frequency by 75% versus single-word devices.

Internal Delay Lock Loop (DLL) aligns echo clocks (CQ/CQ) to output clocks (C/C) for precise data capture at 600 MHz; when disabled via DOFF pin, it reverts to QDR-I mode with 1-cycle latency and max 167 MHz operation. Address inputs (A[19:0]) are multiplexed for both ports, latched on alternating K-clock edges.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, 0.8 mm ball pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102418B and 72T36125, the CY7C1513AV18 uniquely balances 72-Mbit density, 18-bit bus alignment, and DLL-enhanced timing margin - making it optimal for 10GbE switch fabric buffers where pin count, latency determinism, and board-level skew control are jointly critical.

Availability

CY7C1513AV18 is available at Aetrix Electronics and suitable for network infrastructure, high-speed test instrumentation, baseband processing, and industrial real-time control applications requiring stable component supply and long-term obsolescence management.

Supply support for CY7C1513AV18 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 networking, automotive, and industrial systems, emphasizing signal integrity and timing precision.

The QDR-II SRAM product line targets high-throughput, low-latency memory subsystems in packet-switched networks and real-time signal processing, where deterministic dual-port access and source-synchronous timing are mandatory.

FAQ

What is the minimum supported clock frequency for CY7C1513AV18?

The CY7C1513AV18 has no specified minimum clock frequency; it operates down to DC for static timing analysis. Functional operation requires stable K and C clocks with valid setup/hold times per the datasheet's AC characteristics table. At very low frequencies (<10 MHz), DLL lock time becomes negligible, and DOFF can be asserted to bypass DLL if deterministic latency is not required.

Can CY7C1513AV18 operate with only K and C clocks (no K or C)?

Yes - the device supports single-clock domain operation where K is tied to K and C is tied to C. In this mode, all inputs are sampled on K, and outputs are driven on C. The DLL remains functional, and echo clocks CQ/CQ track C. This configuration simplifies PCB layout but forfeits differential clock skew cancellation benefits.

How does ZQ pin calibration affect signal integrity?

ZQ calibration adjusts output driver impedance to match the system data bus (typically 50 Ω), reducing reflections and improving eye diagram margins. With a 240 Ω resistor to ground, outputs are tuned to 48 Ω (0.2 × 240 Ω). Incorrect ZQ termination causes overshoot/undershoot and increases bit error rates above 400 Mbps; leaving ZQ floating or grounded violates specification and disables calibration.

Is JTAG accessible during normal memory operation?

Yes - the JTAG TAP controller operates independently of memory read/write functions. Boundary-scan testing can be performed while the device is idle or even during active memory access, provided TMS/TCK/TDI signals meet setup/hold timing relative to TCK. TDO is three-stated only when TMS is held high for five consecutive TCK cycles (exit from Test-Logic-Reset).