Cypress Semiconductor Corp CY7C1514V18-200BZXI

Overview

CY7C1514V18 from Cypress Semiconductor is a 72-Mbit QDR-II SRAM with 2M × 36 organization, operating at 200 MHz (500 MT/s DDR), supporting concurrent read/write ports and 2-word burst transfers. It delivers high-bandwidth memory for network packet buffering in telecom line cards and switch fabric controllers where deterministic latency and full data coherency are required.

For engineers reviewing the CY7C1514V18 datasheet, CY7C1514V18 pinout, CY7C1514V18 application, or CY7C1514V18 equivalent, key selection criteria include its 165-ball FBGA package, dual-clock DDR interface (K/K and C/C), echo clocks (CQ/CQ), HSTL I/O compatibility, and synchronous self-timed write architecture.

Technical Context

The CY7C1514V18 implements QDR-II architecture with physically separate read and write data paths-36-bit input D[35:0] and 36-bit output Q[35:0]-eliminating bus turnaround overhead. Address inputs A[19:0] are multiplexed for both ports and latched on alternate rising edges of K/K clocks.

It uses two independent clock domains: K/K for write/control timing and C/C for read data output, with echo clocks CQ/CQ synchronized to C/C to simplify high-speed capture. The internal Delay Lock Loop (DLL) ensures precise data placement relative to output clocks, and DOFF allows DLL disable for specific timing constraints.

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, JEDEC MO-245 compliant.

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 ISSI IS61WV102436B, the CY7C1514V18 offers optimal balance of 200 MHz guaranteed operation, built-in echo clocks for simplified capture, and ZQ-based impedance tuning-making it preferred for new telecom and test equipment designs targeting robust 500 MT/s DDR performance.

Availability

CY7C1514V18 is available at Aetrix Electronics and suitable for network packet buffering, switch fabric controllers, telecom line card buffering, and high-speed test equipment requiring stable component supply across extended product lifecycles.

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 systems.

The QDR-II SRAM product line targets high-speed networking infrastructure requiring deterministic latency, concurrent access, and DDR bandwidth-specifically optimized for packet processing, switch fabrics, and protocol acceleration.

FAQ

What is the minimum VDDQ voltage supported by CY7C1514V18?

The device specifies VDDQ = 1.4 V to 1.8 V. Operation below 1.4 V violates HSTL Class I input thresholds and output drive capability; 1.5 V is commonly used to ensure margin against noise and droop while maintaining compatibility with 1.8 V core logic.

Can CY7C1514V18 operate in single-clock mode using only K and K?

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

How does the BWS[3:0] signal map to D[35:0] byte lanes?

BWS0 controls D[7:0], BWS1 controls D[15:8], BWS2 controls D[23:16], and BWS3 controls D[31:24]. D[35:32] are not byte-maskable and always written when WPS is active; they correspond to upper nibble of the 36-bit word.

Is the ZQ pin required for functional operation?

No-ZQ is optional for impedance calibration. If omitted, outputs default to minimum drive strength (≈60 Ω). For optimal signal integrity on 50 Ω traces, connect ZQ to a 240 Ω resistor to ground to set output impedance to 48 Ω, matching typical PCB routing.