Infineon Technologies CY7C1415KV18-300BZI

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. It features separate read/write ports, echo clocks (CQ/CQ), and programmable DOFF for 1-cycle or 1.5-cycle read latency-used in high-bandwidth packet buffering in network line cards.

For engineers reviewing the CY7C1415KV18 datasheet, CY7C1415KV18 pinout, CY7C1415KV18 application, or CY7C1415KV18 equivalent, key selection criteria include concurrent read/write throughput, FBGA-165 package compatibility, HSTL-18 I/O drive, JTAG 1149.1 test support, and QDR II timing margining with K/K and C/C dual-clock domains.

Technical Context

The CY7C1415KV18 implements a synchronous pipelined QDR II architecture with independent read and write data paths, eliminating bus turnaround overhead. Its 1 M × 36 organization uses 18 address bits (A[17:0]), four byte write selects (BWS[3:0]), and supports depth expansion via RPS/WPS control.

It employs a PLL for precise data placement and uses echo clocks (CQ/CQ) to align output data capture at the receiver. Read latency is configurable: 1 cycle when DOFF = LOW (QDR I mode), 1.5 cycles when DOFF = HIGH-enabling trade-offs between timing closure and throughput in FPGA-attached memory subsystems.

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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36150 and IS61QW3636, CY7C1415KV18 uniquely combines HSTL-18 I/O with ZQ calibration, programmable latency (DOFF), and echo clocks-making it optimal for FPGA-based systems demanding timing margin, signal integrity, and test coverage at 333 MHz.

Availability

CY7C1415KV18 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, FPGA-accelerated compute cache, and high-speed test equipment 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

The QDR® II SRAM product line was designed specifically for high-bandwidth, low-latency buffering in networking and telecom infrastructure-emphasizing concurrent access, DDR timing robustness, and system-level signal integrity.

FAQ

What is the function of the DOFF pin on CY7C1415KV18?

The DOFF (Data Output Fall-off) pin configures read latency mode: when asserted HIGH, it enables 1.5-cycle latency (standard QDR II operation); when LOW, it reverts to 1-cycle latency (QDR I compatibility). This setting directly affects timing budget allocation for read data valid windows and must be held stable during operation.

Does CY7C1415KV18 support single-ended clocking?

No-CY7C1415KV18 requires differential clock pairs: K/K for input register control and C/C for output register control. The device does not support single-ended clock inputs; using only one leg violates AC timing specifications and may cause metastability or data corruption.

How many byte write select signals does CY7C1415KV18 use, and what do they control?

CY7C1415KV18 uses four byte write select signals: BWS[3:0]. BWS0 controls D[8:0], BWS1 controls D[17:9], BWS2 controls D[26:18], and BWS3 controls D[35:27]. Each is active-low and sampled synchronously with K/K to enable partial 9-bit byte writes without disturbing unselected bytes.

Is ZQ calibration mandatory for reliable operation?

Yes-ZQ calibration is required to maintain HSTL output impedance accuracy across voltage and temperature. The device samples the external 240 Ω resistor on power-up and periodically during operation; omitting ZQ connection causes output driver mismatch, leading to signal integrity degradation and potential timing violations above 250 MHz.