Cypress Semiconductor Corp CY7C1415KV18-300BZXI

Overview

CY7C1415KV18 from Cypress Semiconductor is a 1 M × 36, 36-Mbit QDR® II SRAM with four-word burst architecture, 333 MHz clock operation (666 MHz DDR data rate), 1.8 V core supply, and 1.4–1.8 V I/O supply - deployed in high-bandwidth packet buffering for network line cards and switch fabric interfaces.

For engineers reviewing the CY7C1415KV18 datasheet, CY7C1415KV18 pinout, CY7C1415KV18 application, or CY7C1415KV18 equivalent, key selection criteria include read latency mode (1-cycle vs. 1.5-cycle via DOFF), echo clock (CQ/CQ) timing margining, byte write select granularity (BWS[3:0]), and FBGA-165 package compatibility with high-speed PCB layout constraints.

Technical Context

This QDR II SRAM implements fully independent read and write ports with separate address latching on alternating K-clock edges, enabling true concurrent read/write transactions without bus turnaround. It uses dual input clocks (K/K for writes, C/C for reads) and echo clocks (CQ/CQ) to decouple data capture timing from board-level skew.

The device integrates a phase-locked loop (PLL) for precise internal data placement, supports synchronous self-timed writes, and provides full data coherency across both ports. Read latency is configurable: 1 cycle when DOFF = LOW (QDR I–compatible mode) or 1.5 cycles when DOFF = HIGH (optimized QDR II mode).

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm, RoHS-compliant, with 0.8 mm ball pitch and standard JEDEC MO-270AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36120 and IS61WV102436B, CY7C1415KV18 uniquely supports configurable read latency, ZQ-calibrated HSTL outputs, and echo clocks - making it optimal for systems demanding maximum timing margin and protocol flexibility at 333 MHz.

Availability

CY7C1415KV18 is available at Aetrix Electronics and suitable for network switching infrastructure, telecom baseband modules, high-speed test instrumentation, and FPGA co-processor memory subsystems requiring stable component supply across extended product lifecycles.

Supply support for CY7C1415KV18 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, with emphasis on signal integrity and timing precision.

CY7C1415KV18 belongs to Cypress's QDR II SRAM product line, engineered specifically for deterministic, low-latency, concurrent-access memory requirements in packet-switched and fabric-based systems.

FAQ

What is the function of the DOFF pin on CY7C1415KV18?

The DOFF (Data Output OFFset) pin configures read latency mode: when asserted HIGH, it enables 1.5-cycle latency for optimized QDR II performance; when LOW, it reverts to 1-cycle latency for QDR I compatibility. This setting directly affects minimum read-to-read timing and must be held stable during operation.

How does the ZQ pin operate in CY7C1415KV18?

ZQ connects to a 240 Ω resistor to ground and enables on-die impedance calibration of HSTL output drivers. During initialization or periodic recalibration, the device measures this reference to adjust pull-up/pull-down strengths, ensuring consistent 25 Ω or 50 Ω output impedance across voltage and temperature variations.

Can CY7C1415KV18 operate with only one clock source?

Yes - in Single Clock Mode, the device uses only the K clock for both read and write operations (C/C inputs tied to K/K), disabling echo clock functionality. This simplifies clock routing but sacrifices timing margin benefits provided by CQ/CQ and independent C/C domains.

What is the purpose of BWS[3:0] signals?

BWS[3:0] are active-LOW byte write selects controlling four independent 9-bit segments of the 36-bit D[35:0] bus. When a BWS bit is deasserted, its corresponding 9-bit byte is ignored during write cycles - enabling partial word updates without read-modify-write sequences or external logic.