Infineon Technologies CY7C1514KV18-300BZXC

Overview

CY7C1514KV18 from Cypress Semiconductor is a 72-Mbit QDR® II SRAM with 2M × 36 organization, 300 MHz clock frequency, 1.8V core supply, and 1.4–1.8V I/O supply. It implements separate read/write ports with DDR interfaces on both, 2-word burst architecture, and echo clocks (CQ/CQ) for high-speed data capture in networking and packet buffering applications.

For engineers reviewing the CY7C1514KV18 datasheet, CY7C1514KV18 pinout, CY7C1514KV18 application, or CY7C1514KV18 equivalent, key selection criteria include its 300 MHz operation, x36 bus width, 165-ball FBGA package, DOFF-controlled read latency mode, and JTAG 1149.1 test support.

Technical Context

The CY7C1514KV18 uses synchronous pipelined QDR II architecture with independent read and write ports sharing a multiplexed address bus. Address latching occurs on alternate rising edges of K/K clocks, enabling concurrent transactions without bus turnaround.

It employs a PLL for precise data placement and supports two timing modes via DOFF: 1.5-cycle read latency (DOFF = HIGH) or 1-cycle latency (DOFF = LOW), matching QDR I compatibility when needed. Echo clocks CQ/CQ are output-synchronized to simplify capture at 700 MT/s.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body height, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-bandwidth dual-port SRAM applications.

Compared with AS7C362000B-300BIN and IS45S32800J-300BLI, the CY7C1514KV18 uniquely supports selectable read latency (1 or 1.5 cycles) and includes JTAG-based impedance tuning - critical for signal integrity in multi-GHz FPGA interfaces.

Availability

CY7C1514KV18 is available at Aetrix Electronics and suitable for packet buffering in network switches, line card memory in telecom routers, and baseband processing in 4G/LTE eNodeB systems requiring stable component supply across extended 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 programmable solutions for communications, industrial, and automotive markets.

The QDR® II SRAM product line targets high-speed packet processing and real-time buffering applications where deterministic latency, concurrent access, and DDR bandwidth are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1514KV18?

The DOFF (Data Output OFF) pin selects read latency mode: when asserted HIGH, it enables 1.5-cycle latency (standard QDR II operation); when LOW, it configures the device for 1-cycle latency, providing backward compatibility with QDR I timing. This setting affects internal pipeline staging and must be held stable during initialization.

How does the CY7C1514KV18 handle partial writes?

Partial writes are controlled by the four Byte Write Select (BWS[3:0]) inputs, each enabling or disabling one 8-bit lane of the 36-bit D[35:0] bus. When a BWS signal is deasserted (HIGH), the corresponding byte remains unaltered - eliminating need for read-modify-write cycles and reducing bus traffic in descriptor updates.

Can the CY7C1514KV18 operate with only one clock domain?

Yes - the device supports single-clock mode where K and C are driven by the same source, and K and C are tied together. In this configuration, the internal PLL is bypassed, and echo clocks CQ/CQ track the single input clock, simplifying timing closure at the cost of reduced skew tolerance versus dual-clock operation.

What is the purpose of the NC/144M and NC/288M pins?

NC/144M and NC/288M are no-connect pins not bonded to the die; they may be left floating or tied to any voltage level (VDD, VSS, or mid-rail). These pins exist for package compatibility across the QDR II family and have no electrical function - their state does not affect device operation or timing.