Cypress Semiconductor Corp CY7C1413KV18-333BZI

Overview

CY7C1413KV18-333BZI from Cypress Semiconductor is a 2 M × 18, 36-Mbit QDR® II SRAM with four-word burst architecture, 333 MHz clock frequency, DDR interfaces on independent read/write ports, and 1.8 V core / 1.4–1.8 V I/O supply - deployed in high-bandwidth packet buffering for network line cards.

For engineers reviewing the CY7C1413KV18-333BZI datasheet, CY7C1413KV18-333BZI pinout, CY7C1413KV18-333BZI application, or CY7C1413KV18-333BZI equivalent, key selection criteria include 1.5-cycle read latency (DOFF = HIGH), echo clock (CQ) support for timing margin recovery, 165-ball FBGA package compatibility, and HSTL-15/18 output drive configuration.

Technical Context

The CY7C1413KV18-333BZI implements a true dual-port synchronous SRAM architecture with physically separate read and write data paths, eliminating bus turnaround delays. It uses two independent input clocks (K/K̄) for address/data capture and two output clocks (C/C̄) with echo clock (CQ/CQ̄) outputs to align data capture at the receiver.

Internally, it features pipelined command execution, synchronous self-timed writes, and programmable impedance via ZQ pin. The device supports both single-clock mode (K = C) and dual-clock mode, with DOFF pin selecting between 1-cycle (DOFF = LOW) and 1.5-cycle (DOFF = HIGH) read latency - critical for deterministic timing in switch fabric controllers.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, 0.8 mm ball pitch, RoHS-compliant Pb-free finish (BZI suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L5 and IS61QW25636A, CY7C1413KV18-333BZI delivers optimal balance of industrial temperature range, proven reliability in telecom infrastructure, and seamless migration path from legacy QDR I designs via DOFF-selectable latency.

Availability

CY7C1413KV18-333BZI is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, baseband processing buffer, and radar signal processing memory requiring stable component supply across extended lifecycle programs.

Supply support for CY7C1413KV18-333BZI 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 connectivity solutions for industrial, automotive, and communications markets.

CY7C1413KV18 belongs to the QDR® II SRAM product line, designed specifically for deterministic, low-latency, high-throughput buffering in networking and telecommunications infrastructure where concurrent read/write bandwidth is mission-critical.

FAQ

What is the function of the DOFF pin on CY7C1413KV18-333BZI?

The DOFF (Data Output OFFset) pin selects read latency mode: when asserted HIGH, it configures 1.5-cycle latency for improved timing margin at 333 MHz; when LOW, it enables 1-cycle latency for backward compatibility with QDR I systems. This pin is sampled synchronously on the K clock and must be held stable during initialization.

Does CY7C1413KV18-333BZI require an external PLL or clock synthesizer?

No. The device integrates an on-chip PLL that locks to the input K clock to generate precisely phase-aligned C and C̄ output clocks. This eliminates the need for external clock generation circuitry, reducing board area and jitter sources - especially beneficial in space-constrained telecom modules.

How does byte write select (BWS) operate in CY7C1413KV18-333BZI?

BWS[1:0] are two active-low signals that independently enable writing to D[8:0] (BWS0) and D[17:9] (BWS1). When a BWS signal is deasserted, its corresponding 9-bit byte remains unaltered during the write cycle - enabling efficient partial-word updates without read-modify-write sequences in packet header editing applications.

Can CY7C1413KV18-333BZI operate with only one clock signal?

Yes. In single-clock mode, the K clock is routed to both K and C inputs (and K̄ to C̄), allowing all operations to be synchronized to one differential pair. This simplifies clock distribution in cost-sensitive designs, though it sacrifices some timing flexibility compared to dual-clock mode with independent read/write clock domains.