Cypress Semiconductor Corp CY7C1415KV18-250BZXI

Overview

CY7C1415KV18 from Cypress Semiconductor is a 1 M × 36, 36-Mbit QDR® II SRAM with four-word burst architecture, 250 MHz maximum operating frequency (400 Mbps per pin), 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 PLL-based DDR timing for high-bandwidth networking buffer applications.

For engineers reviewing the CY7C1415KV18 datasheet, CY7C1415KV18 pinout, CY7C1415KV18 application, or CY7C1415KV18 equivalent, key selection criteria include 1 M × 36 data width, 165-ball FBGA package, DOFF-controlled read latency (1 or 1.5 cycles), HSTL-compatible outputs, and JTAG 1149.1 test support.

Technical Context

The CY7C1415KV18 implements a synchronous pipelined QDR II architecture with independent read and write ports sharing a multiplexed 18-bit address bus (A[17:0]). Read and write operations are latched on alternate rising edges of the K clock, enabling concurrent access without bus turnaround.

It uses dual input clocks (K/K) for write control and dual output clocks (C/C) plus echo clocks (CQ/CQ) to manage skew in high-speed systems. The internal PLL ensures precise data placement, and DOFF pin selects between 1-cycle (LOW) and 1.5-cycle (HIGH) read latency modes.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 × 15 × 1.4 mm, 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 IDT72T3615L10BG and IS61QW3632ALL, CY7C1415KV18 uniquely balances 250 MHz operation, flexible 1.4–1.8 V I/O, DOFF-selectable latency, and integrated echo clocks-making it optimal for FPGA-based networking systems needing timing margin and voltage flexibility.

Availability

CY7C1415KV18 is available at Aetrix Electronics and suitable for high-speed packet buffering, network processor caching, and baseband digital front-end applications 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 bandwidth-intensive infrastructure applications-such as routers, switches, and wireless base stations-where concurrent read/write, low latency, and DDR timing predictability are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1415KV18?

The DOFF (Data Output OFFset) pin selects read latency mode: when asserted HIGH, it enables 1.5-cycle latency for improved timing margin in high-speed systems; when LOW, it configures 1-cycle latency for QDR I compatibility. This setting affects the number of clock cycles between address assertion and valid Q[35:0] output, and is sampled synchronously on the K clock.

Can CY7C1415KV18 operate with only a single clock domain?

Yes-CY7C1415KV18 supports single-clock mode where K and C inputs are tied together, and CQ/CQ outputs are disabled. In this mode, data is latched and driven using the same clock edge, simplifying interface design at the cost of reduced timing margin and loss of echo clock benefits. All timing parameters shift to single-edge specifications per the datasheet.

How does byte write select (BWS) work in CY7C1415KV18?

BWS[3:0] are four active-low signals that independently enable writing to each 8-bit segment of the 36-bit D[35:0] bus. When a BWS bit is LOW, its corresponding byte is written; when HIGH, that byte remains unaltered. This eliminates need for read-modify-write cycles during partial updates-critical for packet header manipulation in networking hardware.

Is JTAG boundary scan supported on CY7C1415KV18?

Yes-CY7C1415KV18 integrates IEEE 1149.1-compliant TAP controller with TDI, TDO, TCK, and TMS pins. It supports instruction register loading, boundary scan register access, and device identification. JTAG can be used for production testing, interconnect verification, and in-system diagnostics-but must be disabled via strap or fuse if unused to prevent unintended activation.