Cypress Semiconductor Corp CY7C1514V18-250BZC

Overview

CY7C1514V18 from Cypress Semiconductor is a 72-Mbit QDR-II SRAM with 2M × 36 organization, designed for high-bandwidth packet buffering in network switches and routers. It features dual independent read/write ports, 250 MHz clock operation (500 MT/s DDR), 1.8 V core supply, and 165-ball FBGA (15 × 17 × 1.4 mm) packaging.

For engineers reviewing the CY7C1514V18 datasheet, CY7C1514V18 pinout, CY7C1514V18 application, or CY7C1514V18 equivalent, key selection criteria include burst depth (2-word), HSTL I/O compatibility, echo clock support (CQ/CQ), DLL-assisted timing alignment, and byte write select granularity (BWS[3:0]) for partial writes.

Technical Context

The CY7C1514V18 implements QDR-II architecture with physically separate read and write data paths, eliminating bus turnaround overhead. Its 20-bit address bus accesses two 1M × 36 memory arrays, latched on alternating edges of K/K clocks to support concurrent port operations.

All synchronous inputs (D[35:0], A[19:0], RPS, WPS, BWS[3:0]) are registered on K/K rising edges; outputs (Q[35:0], CQ, CQ) are edge-aligned to C/C clocks. The integrated Delay Lock Loop (DLL) synchronizes output timing to ±50 ps skew, enabling reliable 500 MHz data capture in multi-device systems.

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 IDT72T36150 and IS61WV102436B, CY7C1514V18 delivers double the density and 25% higher bandwidth with integrated timing aids (DLL, CQ/CQ), making it the sole choice for 10G+ packet processing where deterministic sub-ns timing is mandatory.

Availability

CY7C1514V18 is available at Aetrix Electronics and suitable for network switch fabric design, telecom baseband buffering, high-speed FPGA interconnect, and real-time video pipeline development requiring stable component supply and long-term obsolescence planning.

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 networking, automotive, and industrial systems, with headquarters in San Jose, CA.

CY7C1514V18 belongs to Cypress's QDR-II SRAM product line, engineered specifically for deterministic, low-latency, high-throughput buffering in packet-switched infrastructure where concurrent access and precise timing alignment are critical.

FAQ

What is the minimum VDDQ voltage supported for CY7C1514V18 operation?

The device supports VDDQ from 1.4 V to 1.8 V. Operation below 1.4 V is not characterized or guaranteed; HSTL-18 compliance requires VDDQ ≥ 1.4 V to maintain proper output swing and termination matching. At 1.4 V, drive strength is reduced by ~25% versus 1.8 V, affecting maximum trace length.

Can CY7C1514V18 operate without the DLL enabled?

Yes - asserting DOFF low disables the DLL, reverting to basic register-to-register timing. However, output skew increases from ±50 ps to ±250 ps, and CQ/CQ phase alignment degrades. This mode is only recommended for lab validation or legacy timing closure where board-level deskew is implemented externally.

How many address bits are required to access the full 2M × 36 array?

20 address bits (A[19:0]) are required. The internal organization uses two 1M × 36 arrays; the most significant bit selects the array, and the remaining 19 bits address within each array. Address multiplexing allows full access using only 20 pins instead of separate read/write address buses.

Is ZQ pin connection mandatory for production use?

Yes - ZQ must be connected either to a 240 Ω resistor to ground (for 48 Ω output impedance calibration) or directly to VDDQ (for minimum 30 Ω impedance). Leaving ZQ floating or tying to VSS violates HSTL specifications and causes signal integrity failures on Q[35:0] and CQ/CQ outputs.