Cypress Semiconductor Corp CY7C1515JV18-300BZC

Overview

CY7C1515JV18 from Cypress Semiconductor is a 72-Mbit QDR® II SRAM with 2M × 36 organization, 300 MHz clock operation, double data rate (DDR) read/write interfaces delivering 600 MT/s effective throughput, 1.5-cycle read latency with DLL enabled, and 165-ball FBGA (15 × 17 × 1.4 mm) package. It serves as a high-bandwidth buffer in network packet processors requiring concurrent read/write access without bus turnaround.

For engineers reviewing the CY7C1515JV18 datasheet, CY7C1515JV18 pinout, CY7C1515JV18 application, or CY7C1515JV18 equivalent, key selection criteria include DDR timing compliance, echo clock (CQ/CQ) support for high-speed data capture, HSTL-18 I/O compatibility, DLL-enabled latency mode, and depth expansion via RPS/WPS port selects.

Technical Context

The CY7C1515JV18 implements a synchronous pipelined QDR II architecture with physically separate read and write ports, enabling true concurrency: reads use C/C clocks while writes use K/K clocks, both operating at 300 MHz. Address inputs are multiplexed and latched on alternating rising edges of K/K to support 19-bit addressing for 2M depth.

It features a Delay Lock Loop (DLL) that aligns output data to C/C edges with ±0.15 ns jitter, supports variable-drive HSTL-18 outputs, and includes JTAG 1149.1 test access. The DOFF pin disables the DLL to revert to QDR I timing (1-cycle latency, ≤167 MHz), and ZQ enables impedance tuning via external resistor.

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 IDT72T3615L10PA and IS61WV204836BLL-150BLI, CY7C1515JV18 uniquely delivers 300 MHz DDR performance with DLL-aligned echo clocks-enabling robust >400 Mbps link margins in telecom and test equipment where timing margin is constrained.

Availability

CY7C1515JV18 is available at Aetrix Electronics and suitable for network packet processors, telecom line cards, high-speed test equipment, and avionics data recorders requiring stable component supply, long-lifecycle support, and consistent FBGA packaging.

Supply support for CY7C1515JV18 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, industrial, and automotive systems, with emphasis on signal integrity and timing precision.

CY7C1515JV18 belongs to the QDR® II SRAM product line, engineered specifically for applications demanding concurrent, low-latency, high-bandwidth memory access in packet-switched infrastructure.

FAQ

What is the function of the DOFF pin on CY7C1515JV18?

The DOFF pin disables the internal Delay Lock Loop when pulled LOW. In this state, the device operates in QDR I mode with 1-cycle read latency and a maximum frequency of 167 MHz. For normal QDR II operation at 300 MHz with 1.5-cycle latency, DOFF must be tied HIGH via a ≤10 kΩ pull-up resistor to VDDQ.

How does the ZQ pin affect output drive strength?

ZQ calibrates the output impedance of Q[35:0], CQ, and CQ pins. When connected to a resistor (RQ) to ground, outputs are tuned to 0.2 × RQ; typical RQ = 240 Ω yields ~48 Ω drive strength matching standard PCB traces. Connecting ZQ directly to VDDQ enables minimum impedance (~25 Ω), while leaving it unconnected or grounded violates specification.

Can CY7C1515JV18 operate with only a single clock domain?

Yes - the device supports single-clock mode where K/K serve as both input and output clocks. In this configuration, Q[35:0] data is driven on rising edges of K/K instead of C/C, and CQ/CQ are generated relative to K/K. This simplifies clock distribution but sacrifices deskew capability provided by dedicated C/C pairs.

What is the purpose of BWS[3:0] in 36-bit mode?

BWS[3:0] are active-LOW byte write select signals controlling four independent 9-bit lanes: BWS0 → D[8:0], BWS1 → D[17:9], BWS2 → D[26:18], BWS3 → D[35:27]. Asserting only selected BWS lines enables partial 36-bit writes without disturbing unselected bytes - essential for protocol header updates or metadata patching.