Infineon Technologies CY7C1514KV18-250BZXC

Overview

CY7C1514KV18 from Cypress Semiconductor is a 2M × 36-bit (72-Mbit), 1.8V QDR® II SRAM with synchronous pipelined architecture, dual independent read/write ports, 250 MHz K-clock operation (500 MT/s effective data rate), and DDR interfaces on both ports. It delivers concurrent high-bandwidth memory access for network packet buffering in telecom line cards and FPGA co-processor systems.

For engineers reviewing the CY7C1514KV18 datasheet, CY7C1514KV18 pinout, CY7C1514KV18 application, or CY7C1514KV18 equivalent, key selection criteria include its 2-word burst depth, DOFF-controlled 1.5-cycle vs. 1-cycle read latency, HSTL-18 I/O compatibility, 165-ball FBGA (13 × 15 mm) package, and JTAG 1149.1 test support.

Technical Context

This SRAM implements true QDR II architecture: separate read and write data paths eliminate bus turnaround, enabling simultaneous read and write transactions at full bandwidth. Address latching uses alternating rising edges of K/K clocks, while output timing relies on C/C or echo clocks (CQ/CQ) to mitigate flight-time skew.

The device integrates a PLL for precise data placement, supports programmable impedance via ZQ pin, and features synchronous self-timed writes with byte-level write select (BWS[3:0]) for partial-word updates. Core VDD = 1.8 V ±0.1 V; I/O VDDQ = 1.4–1.8 V, supporting interoperability with 1.5 V and 1.8 V systems.

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 high-bandwidth synchronous SRAM applications.

Compared with IDT72T3615 and IS61WV204836B, CY7C1514KV18 uniquely combines 250 MHz operation, DOFF-configurable latency, CQ echo clocks for simplified capture, and IEEE 1149.1 JTAG-making it optimal for next-gen telecom and test equipment demanding maximum deterministic bandwidth.

Availability

CY7C1514KV18 is available at Aetrix Electronics and suitable for telecom infrastructure, network processor acceleration, FPGA-based protocol offload, and high-speed automated test equipment requiring stable component supply across long production lifecycles.

Supply support for CY7C1514KV18 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 mixed-signal ICs for networking, automotive, and industrial applications, with emphasis on signal integrity and system-level timing robustness.

CY7C1514KV18 belongs to the QDR® II SRAM product line, engineered specifically for full-duplex, high-throughput memory subsystems in packet-switched infrastructure where deterministic latency and concurrent access are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1514KV18?

The DOFF (Data Out Fast) pin configures read latency mode: when asserted HIGH, the device operates with 1.5-cycle read latency for improved timing margin; when LOW, it uses 1-cycle latency for maximum pipeline efficiency. This setting is sampled synchronously on the K clock and remains active until changed.

How does the CY7C1514KV18 handle partial-word writes?

Partial-word writes are controlled by four active-low Byte Write Select signals (BWS[3:0]), each enabling one 8-bit byte lane within the 36-bit word. When a BWS bit is deasserted, the corresponding byte is ignored during the write cycle, preserving existing data in those bits without requiring read-modify-write sequences.

Can CY7C1514KV18 operate with only a single clock domain?

Yes-CY7C1514KV18 supports single-clock-domain operation by tying K to C and K to C, eliminating need for separate clock generators. In this mode, echo clocks (CQ/CQ) remain functional for source-synchronous data capture, and all timing parameters shift to reflect the unified clock path per the datasheet's "Single Clock Mode" section.

What is the purpose of the ZQ pin and how must it be connected?

The ZQ pin connects to an external 240 Ω resistor to ground and enables on-die impedance calibration for HSTL-18 output drivers. This calibration ensures consistent 25 Ω driver impedance across voltage and temperature, eliminating need for external series termination and maintaining signal integrity at 500 MT/s data rates.