Cypress Semiconductor Corp CY7C1525KV18-333BZC

Overview

CY7C1525KV18-333BZC from Cypress Semiconductor is an 8M × 9 (72-Mbit) QDR® II SRAM with synchronous pipelined architecture, dual independent read/write ports, 333 MHz K-clock operation, DDR interfaces delivering 666 MT/s effective data rate, and 1.8V core / 1.4–1.8V I/O supply. It serves as high-bandwidth buffer memory in network packet processors and telecom line cards requiring concurrent access and strict timing coherency.

For engineers reviewing the CY7C1525KV18-333BZC datasheet, CY7C1525KV18-333BZC pinout, CY7C1525KV18-333BZC application, or CY7C1525KV18-333BZC equivalent, key selection criteria include burst depth (2-word), DOFF-controlled read latency (1.5 or 1 cycle), echo clock (CQ/CQ) support for source-synchronous capture, and FBGA-165 package compatibility with high-speed PCB layout constraints.

Technical Context

The device implements a true dual-port QDR II architecture: separate address latching on alternating K-clock edges for read/write, fully independent data paths eliminating bus turnaround, and synchronous self-timed writes with internal write-enable sequencing. All inputs are registered to K/K clocks; all outputs are registered to C/C clocks or optionally K/K in single-clock mode.

It integrates a PLL for precise output data placement, JTAG 1149.1 boundary scan for testability, programmable impedance (ZQ calibration), and variable-drive HSTL-18 I/O buffers. Read latency is configurable via DOFF pin: 1.5 cycles (DOFF = HIGH) or 1 cycle (DOFF = LOW), matching QDR I timing when needed.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm footprint, 1.4 mm height, 0.8 mm ball pitch, JEDEC MO-270AC compliant. Designed for high-density routing and thermal dissipation in multi-GHz systems.

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 IS61WV102418BLL-10BLI, CY7C1525KV18-333BZC uniquely balances 72-Mbit density, 333 MHz QDR II concurrency, and FBGA-165 footprint-making it optimal for space-constrained, high-throughput telecom and networking designs requiring strict timing control without over-provisioning.

Availability

CY7C1525KV18-333BZC is available at Aetrix Electronics and suitable for network packet processing, telecom line cards, baseband processing units, and high-performance test equipment requiring stable component supply across extended product lifecycles.

Supply support for CY7C1525KV18-333BZC 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 solutions for industrial, automotive, and communications markets.

CY7C1525KV18 belongs to the QDR® II SRAM product line, designed specifically for applications demanding simultaneous high-speed read/write access, deterministic latency, and source-synchronous timing in infrastructure equipment.

FAQ

What is the function of the DOFF pin on CY7C1525KV18-333BZC?

The DOFF (Data Output OFFset) pin configures read latency: when asserted HIGH, it enables 1.5-cycle read latency optimized for QDR II pipeline efficiency; when LOW, it selects 1-cycle latency for backward compatibility with QDR I systems. This pin is sampled synchronously on the K clock and affects all subsequent read operations until changed.

Does CY7C1525KV18-333BZC require external termination resistors?

No-CY7C1525KV18-333BZC integrates programmable on-die termination (ODT) calibrated via the ZQ pin. When ZQ is pulled to VDDQ, the device performs automatic impedance calibration against a 240 Ω external reference resistor, eliminating need for discrete series or parallel termination components on DQ/CQ lines.

Can CY7C1525KV18-333BZC operate with only one clock domain?

Yes-it supports single-clock mode where both K and C clocks are driven by the same source. In this configuration, read data is registered to the same clock that latches addresses, simplifying clock tree design at the cost of reduced timing margin compared to dual-clock operation with dedicated C/C outputs.

What is the purpose of the BWS0 pin in the 8M × 9 configuration?

In CY7C1525KV18-333BZC (8M × 9), BWS0 is the sole byte write select and controls the entire 9-bit D[8:0] bus. When BWS0 is LOW, the full 9-bit word is written; when HIGH, the write operation is ignored. Unlike narrower configurations, no nibble-level select is provided-BWS0 operates as a global write enable for the port.