Cypress Semiconductor Corp CY7C1514AV18-200BZXI

Overview

CY7C1514AV18-200BZXI from Cypress Semiconductor is a 72-Mbit QDR® II SRAM with 2M × 36 organization, 1.8V core supply, and 200 MHz operation (500 MT/s DDR interface). It features dual independent read/write ports, 1.5-cycle read latency with DLL enabled, and echo clocks (CQ/CQ) for high-speed data capture in networking buffers and packet processors.

For engineers reviewing the CY7C1514AV18-200BZXI datasheet, CY7C1514AV18-200BZXI pinout, CY7C1514AV18-200BZXI application, or CY7C1514AV18-200BZXI equivalent, key selection factors include x36 bus width, 165-ball FBGA package, HSTL I/O compatibility, DLL-controlled timing, and depth expansion via RPS/WPS port selects.

Technical Context

This QDR II SRAM implements fully synchronous, pipelined burst architecture with physically separate read and write data paths-eliminating bus turnaround overhead. It uses two independent clock domains: K/K for address/control/data input registration and C/C for output data timing, with CQ/CQ echo clocks aligned to C/C for precise source-synchronous capture.

The device supports both DLL-on mode (1.5-cycle read latency, up to 250 MHz) and DLL-off mode (1-cycle latency, QDR I timing, max 167 MHz), selected via DOFF pin. Internal organization comprises two 1M × 36 arrays, accessed via 20-bit multiplexed address bus with port-select–gated read/write arbitration.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, RoHS-compliant, 1.0 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar QDR II SRAM applications.

Compared with IDT72T3615L10BG and IS61WV204836BLL-200BLI, the CY7C1514AV18-200BZXI uniquely delivers HSTL-compatible source-synchronous timing with CQ/CQ echo clocks, enabling tighter timing margins in 200 MHz+ switch fabric designs.

Availability

CY7C1514AV18-200BZXI is available at Aetrix Electronics and suitable for network packet buffering, switch fabric memory, and telecom line card memory requiring stable component supply and long-term industrial availability.

Supply support for CY7C1514AV18-200BZXI 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and programmable logic solutions for industrial, automotive, and communications markets.

The QDR® II SRAM product line was designed specifically for high-bandwidth, low-latency data buffering in networking and telecommunications infrastructure-emphasizing concurrent access, source-synchronous timing, and robust signal integrity at multi-Gbps rates.

FAQ

What is the function of the DOFF pin on CY7C1514AV18-200BZXI?

The DOFF (DLL Turn Off) pin is an active-LOW control that disables the internal Delay Lock Loop. When pulled LOW, the device operates in QDR I mode with 1-cycle read latency and maximum frequency reduced to 167 MHz. For standard QDR II operation at 200 MHz with 1.5-cycle latency, DOFF must be held HIGH via a ≤10 kΩ pull-up resistor to VDDQ.

How does the ZQ pin affect output impedance calibration?

The ZQ pin connects to an external 240 Ω resistor to ground, enabling on-die calibration of Q[35:0] and CQ/CQ output drivers to match 48 Ω (0.2 × 240 Ω). This ensures consistent HSTL Class I drive strength across voltage and temperature variations. Connecting ZQ directly to VDDQ forces minimum impedance mode; leaving it unconnected or tied to GND violates specification and may cause signal integrity failure.

Can CY7C1514AV18-200BZXI operate with only one clock pair instead of two?

Yes-it supports single-clock mode using only K/K for both input registration and output timing (Q[35:0] driven on K/K edges). In this mode, C/C and CQ/CQ are unused. However, this sacrifices deskew capability and limits maximum frequency due to increased clock-to-out variation; dual-clock mode with C/C remains recommended for 200 MHz operation and timing closure.

What is the purpose of BWS[3:0] in x36 configuration?

BWS[3:0] are active-LOW byte write select signals that gate 9-bit segments of the 36-bit write data bus: BWS0 controls D[8:0], BWS1 controls D[17:9], BWS2 controls D[26:18], and BWS3 controls D[35:27]. Asserting only selected BWS lines allows partial-word writes-essential for modifying packet headers without disturbing payload data in networking applications.