Cypress Semiconductor Corp CY7C1514KV18-250BZC

Overview

CY7C1514KV18 from Cypress Semiconductor is a 72-Mbit QDR® II SRAM with 2M × 36 organization, 1.8V core supply, and dual DDR interfaces supporting 350 MHz operation (700 MT/s data rate). It features separate read/write ports, 1.5-cycle read latency (DOFF = HIGH), echo clocks (CQ/CQ), and PLL-based timing control for high-bandwidth packet buffering in network line cards.

For engineers reviewing the CY7C1514KV18 datasheet, CY7C1514KV18 pinout, CY7C1514KV18 application, or CY7C1514KV18 equivalent, key selection criteria include x36 bus width, 165-ball FBGA package, 1.8V/1.4V dual-supply operation, QDR II burst architecture, and concurrent read/write capability without bus turnaround.

Technical Context

This SRAM implements true QDR II architecture with physically independent read and write data paths-no shared I/O pins-enabling simultaneous access to the same memory array. Its 2-word burst transfers occur on every rising edge of K/K and C/C clocks, achieving full-duplex 700 MT/s throughput at 350 MHz.

The device uses synchronous self-timed writes, supports depth expansion via RPS/WPS signals, and relies on a PLL to align echo clocks (CQ/CQ) with output data for reliable capture at system-level speeds. DOFF pin selects between 1.5-cycle (HIGH) and 1-cycle (LOW) read latency modes.

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 QDR II SRAM applications.

Compared with IDT72T3615 and IS61WV102436B, CY7C1514KV18 delivers higher bandwidth (700 vs. 666/400 MT/s), superior timing robustness via echo clocks and PLL, and full 72-Mbit density in a single 165-ball FBGA - making it optimal for next-generation networking silicon integration.

Availability

CY7C1514KV18 is available at Aetrix Electronics and suitable for high-speed packet buffering, network line card memory, protocol processing engines, and multi-core processor cache coherency applications requiring stable component supply and long-term industrial availability.

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, computing, and industrial systems.

CY7C1514KV18 belongs to the QDR® II SRAM product line, engineered specifically for ultra-low-latency, concurrent-access memory subsystems in packet-switched infrastructure equipment.

FAQ

What is the function of the DOFF pin on CY7C1514KV18?

The DOFF pin controls read latency mode: when asserted HIGH, it configures the device for 1.5-cycle read latency, providing additional timing margin for high-speed system interfaces; when LOW, it enables 1-cycle latency for minimal access delay. This setting is sampled synchronously on the K clock and affects all subsequent read operations until changed.

Does CY7C1514KV18 support single-clock domain operation?

Yes - CY7C1514KV18 supports single-clock mode where K and C are tied together, and K and C are tied together. In this configuration, the device operates with simplified timing but retains full QDR II functionality including concurrent read/write and echo clocks, though CQ/CQ phase alignment is relative to the combined clock.

How does the BWS[3:0] signal enable partial writes in CY7C1514KV18?

BWS[3:0] are four active-LOW byte write enable signals that independently gate 8-bit lanes of the 36-bit D[35:0] bus. When a BWS bit is deasserted, its corresponding byte is ignored during the write cycle, preserving existing memory contents in those byte positions - eliminating need for read-modify-write sequences in protocol header updates.

What is the role of the echo clocks CQ and CQ in system timing?

CQ and CQ are source-synchronous output clocks driven with Q[35:0] data, matching the phase and skew characteristics of the data signals. They allow receiving devices (e.g., FPGAs) to latch Q outputs using the same clock edge that launched them, relaxing setup/hold timing requirements by up to 300 ps compared to using a system-generated clock.