Cypress Semiconductor Corp CY7C1614KV18-300BZC

Overview

CY7C1614KV18 from Infineon Technologies (formerly Cypress) is a 4M × 36, 144-Mbit QDR® II synchronous SRAM with two-word burst architecture, 300 MHz clock operation (720 Mbps DDR data rate), 1.8 V core supply, and 1.4–1.8 V I/O supply. It features separate read/write ports, echo clocks (CQ/CQ), DOFF-configurable 1- or 1.5-cycle read latency, and is used in high-bandwidth networking buffers and packet forwarding engines.

For engineers reviewing the CY7C1614KV18 datasheet, CY7C1614KV18 pinout, CY7C1614KV18 application, or CY7C1614KV18 equivalent, key selection criteria include its 36-bit bus width, 165-ball FBGA package, QDR II timing compliance, byte-write select (BWS[3:0]) granularity, and PLL-synchronized data placement for deterministic capture in multi-chip memory subsystems.

Technical Context

The CY7C1614KV18 implements a true dual-port QDR II architecture with physically independent read and write data paths-no bus turnaround required. Its 21-bit address bus accesses a 4M-depth × 36-bit-wide memory array organized as two 2M × 36 sub-arrays, latched on alternating edges of K/K clocks.

All synchronous inputs register on K/K rising edges; outputs register on C/C rising edges. The integrated PLL ensures precise data-eye alignment, while echo clocks (CQ/CQ) enable source-synchronous capture at the controller. DOFF pin selects between 1-cycle (QDR I–compatible) and 1.5-cycle (QDR II–optimized) read latency modes.

Key Specifications

Pinout & Package

Package: 165-ball fine-pitch BGA (15 mm × 17 mm × 1.4 mm height), RoHS-compliant, with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1612KV18 and CY7C1625KV18, the CY7C1614KV18 provides optimal bandwidth-per-pin efficiency for 36-bit wide ASIC/FPGA interfaces, avoids external multiplexing logic needed for narrower buses, and supports finer-grained byte masking essential for metadata-aware packet processing.

Availability

CY7C1614KV18 is available at Aetrix Electronics and suitable for network packet buffering, switch fabric memory, telecom line card memory, and test equipment pattern memory requiring stable component supply across long-lifecycle deployments.

Supply support for CY7C1614KV18 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

Infineon Technologies acquired Cypress Semiconductor in 2020 and maintains full product continuity, technical support, and manufacturing for the QDR II SRAM portfolio originally developed by Cypress.

This device belongs to the QDR® II SRAM product line, engineered specifically for deterministic, high-bandwidth memory interfacing in networking, telecommunications, and test instrumentation where dual-port concurrency and sub-10 ns latency are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1614KV18?

The DOFF (Data Out Fall-off) pin configures read latency mode: when asserted high, it enables 1.5-cycle latency for QDR II operation, optimizing timing margin at high frequencies; when low, it reverts to 1-cycle latency for QDR I compatibility. This setting directly affects controller pipeline staging and must be held stable during initialization.

How does the CY7C1614KV18 handle byte-level writes?

It uses four active-low byte write select signals (BWS[3:0]), each controlling a distinct 9-bit segment of the 36-bit D[35:0] bus. When a BWS signal is deasserted, the corresponding byte remains unaltered during the write cycle - enabling partial-word updates without read-modify-write sequences or external logic.

Can CY7C1614KV18 operate with only a single clock domain?

Yes - it supports single-clock mode where K and C are tied together (and K and C likewise), simplifying clock tree design. In this mode, all data transfers synchronize to the K clock edges, though deskew benefits from C/C and echo clocks are forfeited, reducing maximum reliable frequency to ~250 MHz.

What is the role of the CQ and CQ pins?

CQ and CQ are echo clocks - buffered, source-synchronous copies of C and C outputs, routed alongside Q[35:0]. They provide the controller with precise timing references for capturing read data, eliminating need for complex DQS generation and relaxing PCB trace length matching requirements across the 36-bit bus.