Infineon Technologies CY7C1315KV18-333BZC

Overview

CY7C1315KV18 from Cypress Semiconductor is a 512K × 36-bit, 18-Mbit QDR® II SRAM with four-word burst architecture, 333 MHz clock operation (666 MHz DDR data rate), separate read/write ports, and 1.8 V core / 1.4–1.8 V I/O supply. It delivers concurrent high-bandwidth memory access for network packet buffering in telecom line cards.

For engineers reviewing the CY7C1315KV18 datasheet, CY7C1315KV18 pinout, CY7C1315KV18 application, or CY7C1315KV18 equivalent, key selection criteria include its 512K × 36 organization, dual-clock DDR timing (K/K and C/C), echo clocks (CQ/CQ), DOFF-configurable 1- vs 1.5-cycle read latency, and 165-ball FBGA (13 × 15 × 1.4 mm) package compatibility.

Technical Context

The CY7C1315KV18 implements true QDR II architecture with physically independent read and write data paths-no bus turnaround required. Its 17-bit address bus latches on rising edges of K clock for both ports, while read data is registered on C/C clocks and write data on K/K clocks.

It uses internal PLL for precise data placement, supports JTAG 1149.1 boundary scan, and features programmable HSTL output drive strength. Depth expansion is enabled via four active-low byte write selects (BWS[3:0]) and port-select signals (WPS/RPS), each sampled synchronously on K/K rising edges.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body height, 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 IDT72T36150 and IS61WV102436B, CY7C1315KV18 uniquely balances 333 MHz operation, configurable read latency, and echo-clock–assisted capture-making it optimal for FPGA-based systems requiring deterministic timing and moderate bandwidth scaling.

Availability

CY7C1315KV18 is available at Aetrix Electronics and suitable for network packet buffering, high-speed test equipment memory, telecom baseband processing, and real-time video frame buffering requiring stable component supply across extended production lifecycles.

Supply support for CY7C1315KV18 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-throughput, low-latency memory subsystems in packet-switched infrastructure-specifically engineered for concurrent read/write workloads without bus arbitration overhead.

FAQ

What is the function of the DOFF pin on CY7C1315KV18?

The DOFF (Data Output OFFset) pin configures read latency: when held LOW, the device operates with 1-cycle read latency (like QDR I); when held HIGH, it uses 1.5-cycle latency for improved timing margin in high-frequency designs. This setting is sampled at power-up and remains static during operation-it is not dynamically reconfigurable.

How does the CY7C1315KV18 handle partial writes?

Partial writes are controlled by the four active-low Byte Write Select signals (BWS[3:0]), each enabling one 9-bit byte within the 36-bit D[35:0] bus. When a BWS signal is deasserted, the corresponding byte remains unaltered in memory-no read-modify-write sequence is needed, preserving data integrity and reducing controller overhead.

Can CY7C1315KV18 operate with only a single clock domain?

Yes-though optimized for dual-clock operation (K/K for writes, C/C for reads), the device supports single-clock mode by tying K = C and K = C. In this configuration, all registers use the same clock edges, simplifying timing analysis at the cost of reduced maximum bandwidth due to shared clock path limitations.

What is the purpose of the CQ and CQ pins?

CQ and CQ are echo clocks-output-synchronous copies of C and C-driven concurrently with Q[35:0] data. They provide a dedicated, low-skew capture clock for receiving logic (e.g., FPGA IDELAY/ISERDES), eliminating the need for board-level clock-data alignment and improving setup/hold margin at 666 MHz DDR rates.