Cypress Semiconductor Corp CY7C1515KV18-300BZI

Overview

CY7C1515KV18 from Cypress Semiconductor is a 72-Mbit QDR® II SRAM with 2M × 36 organization, 333 MHz clock frequency, 1.8 V core supply, and 1.4–1.8 V I/O supply. It implements separate read/write ports with DDR interfaces, four-word burst architecture, and echo clocks (CQ/CQ) for high-speed data capture in networking and packet buffering applications.

For engineers reviewing the CY7C1515KV18 datasheet, CY7C1515KV18 pinout, CY7C1515KV18 application, or CY7C1515KV18 equivalent, key selection criteria include its 333 MHz operation, 2M × 36 × 4-word burst depth, FBGA-165 package, DOFF-configurable read latency (1.5-cycle or 1-cycle), and HSTL-compatible output drive capability.

Technical Context

The CY7C1515KV18 uses a synchronous pipelined QDR II architecture with independent read and write ports sharing a multiplexed 19-bit address bus. Address latching occurs on alternate rising edges of the K clock, enabling concurrent read/write transactions without bus turnaround.

It employs dual input clocks (K/K) for write timing and dual output clocks (C/C) with echo clocks (CQ/CQ) to compensate for flight-time skew. A built-in PLL ensures precise data placement, and self-timed writes guarantee deterministic write completion within one clock cycle.

Key Specifications

Pinout & Package

Package: 165-ball fine-pitch ball grid array (FBGA), 13 mm × 15 mm × 1.4 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36150 and IS61QW25636A, the CY7C1515KV18 uniquely delivers 72-Mbit density at 333 MHz with configurable latency and echo-clock–assisted data capture-critical for next-generation packet processing and test instrumentation.

Availability

CY7C1515KV18 is available at Aetrix Electronics and suitable for high-speed packet buffering, network switch fabric memory, and telecom baseband processing requiring stable component supply and long-term industrial availability.

Supply support for CY7C1515KV18 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 applications.

The QDR® II SRAM product line targets high-bandwidth, low-latency memory subsystems in communications infrastructure-specifically engineered to replace legacy SRAMs in packet-forwarding engines and protocol accelerators.

FAQ

What is the function of the DOFF pin on CY7C1515KV18?

The DOFF (Data Output OFFset) pin configures read latency: when asserted HIGH, it enables 1.5-cycle latency for improved setup/hold timing margins; when LOW, it selects 1-cycle latency for minimal delay. This setting directly controls internal pipeline staging and must be held stable during operation.

Does CY7C1515KV18 support single-ended clocking?

No. The device requires differential clock pairs (K/K and C/C) for proper operation. Although only the rising edge of K is used for input sampling, both K and K must be driven with complementary signals. Similarly, C and C are required for valid read data output timing and echo clock generation.

How does byte write select (BWS) work in 2M × 36 mode?

In CY7C1515KV18, BWS[3:0] independently controls four 9-bit bytes within the 36-bit word: BWS0 enables D[8:0], BWS1 enables D[17:9], BWS2 enables D[26:18], and BWS3 enables D[35:27]. Each is active LOW and sampled synchronously with data on the K clock edge.

Is the 165-ball FBGA package lead-free?

Yes. The CY7C1515KV18-300BZI variant is specified with Pb-free (RoHS-compliant) packaging. The 'BZI' suffix denotes industrial temperature range (–40°C to +85°C) and lead-free FBGA construction, verified per Cypress's ordering code definitions in Document 001-00435 Rev. *W.