Cypress Semiconductor Corp CY7C1514V18-250BZI

Overview

CY7C1514V18 from Cypress Semiconductor is a 72-Mbit QDR-II SRAM with 2M × 36 organization, 250 MHz clock operation, DDR interfaces on independent read/write ports, and 165-ball FBGA (15 × 17 × 1.4 mm) packaging. It delivers 500 MT/s data transfer rate per port and supports concurrent read/write transactions in high-bandwidth networking and packet buffering applications.

For engineers reviewing the CY7C1514V18 datasheet, CY7C1514V18 pinout, CY7C1514V18 application, or CY7C1514V18 equivalent, key selection criteria include its dual-clock DDR timing architecture, 36-bit burst width, HSTL I/O compatibility, DLL-based data alignment, and depth-expansion support via BWS[3:0] and port-select controls.

Technical Context

The CY7C1514V18 implements a synchronous pipelined QDR-II architecture with physically separate read and write data paths, eliminating bus turnaround overhead. Its 20-bit address bus accesses a 1M × 36 memory array per internal bank (dual-bank configuration), with address latching on alternating rising edges of K/K clocks.

It uses four independent clock domains: K/K for write/control inputs, C/C for read outputs, plus echo clocks CQ/CQ referenced to C/C for source-synchronous data capture. The integrated Delay Lock Loop (DLL) aligns Q[35:0] output timing to C/C edges within ±50 ps jitter, enabling reliable 500 MHz DDR operation at 250 MHz clock frequency.

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 Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and IS61WV102436B, the CY7C1514V18 uniquely delivers 72-Mbit density with 500 MT/s DDR throughput, echo-clock–assisted capture, and DLL-based timing precision - making it the only viable choice for 10G+ packet processing pipelines requiring deterministic sub-nanosecond timing alignment.

Availability

CY7C1514V18 is available at Aetrix Electronics and suitable for high-speed packet buffering, network switch fabric memory, telecom line card buffering, and high-performance test equipment requiring stable component supply and long-term obsolescence management.

Supply support for CY7C1514V18 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 markets.

The QDR-II SRAM product line targets high-bandwidth, low-latency memory subsystems in networking and test equipment, emphasizing concurrent access, source-synchronous timing, and scalable density for packet-forwarding architectures.

FAQ

What is the minimum VDDQ voltage supported by CY7C1514V18?

The device supports VDDQ from 1.4 V to 1.8 V. Operation below 1.4 V violates HSTL Class I specifications and risks output driver malfunction or timing violations. At 1.4 V, output drive strength is reduced by ~30% versus 1.8 V, requiring careful PCB trace impedance matching.

Can CY7C1514V18 operate in single-clock mode?

Yes - when C and C are tied to K and K respectively, the device operates in single-clock mode. In this mode, Q[35:0] is clocked by K/K instead of C/C, and CQ/CQ are generated relative to K/K. Output timing parameters shift accordingly, and DLL behavior remains active unless DOFF is asserted.

How does ZQ pin calibration affect signal integrity?

ZQ connects to an external resistor (typically 100 Ω) to ground, calibrating output driver impedance to 0.2×RQ = 20 Ω. This matches standard 50 Ω transmission lines with proper series termination, reducing reflections and improving eye diagram margin at 500 MT/s. Leaving ZQ unconnected or shorted to GND disables calibration and degrades timing margins.

Is JTAG boundary scan functional with DLL disabled via DOFF?

Yes - JTAG operation (TCK/TMS/TDI/TDO) remains fully functional regardless of DOFF state. Boundary scan logic resides outside the DLL domain and operates independently of clock alignment circuits. However, disabling DLL alters output timing windows, so scan test vectors must account for increased setup/hold uncertainty on Q[35:0].