Infineon Technologies CY7C1512KV18-250BZXI

Overview

CY7C1512KV18 from Cypress Semiconductor is a 4M × 18-bit (72-Mbit), 1.8V QDR® II SRAM with dual independent DDR read/write ports, 250 MHz clock operation (500 MT/s per port), 1.5-cycle read latency (DOFF = HIGH), and HSTL-compatible I/O supporting 1.4–1.8V VDDQ. It enables high-throughput packet buffering in network line cards.

For engineers reviewing the CY7C1512KV18 datasheet, CY7C1512KV18 pinout, CY7C1512KV18 application, or CY7C1512KV18 equivalent, key selection criteria include burst-2 DDR timing compliance, FBGA-165 package compatibility, 1.5-cycle vs. 1-cycle latency mode selection via DOFF, and depth expansion support via RPS/WPS signals.

Technical Context

This QDR II SRAM implements fully synchronous, pipelined access with separate K/K clocks for write address/data capture and C/C clocks for read data output-enabling concurrent read/write transactions without bus turnaround. The internal PLL ensures precise 700 MHz DDR edge placement relative to input clocks.

It uses a single multiplexed address bus latched on alternating K-clock edges for read and write addresses, and supports byte-write masking via four BWS inputs (BWS0–BWS3) for selective 18-bit word updates. Core logic operates at 1.8V ±0.1V; I/Os are HSTL-compliant with programmable drive strength and ZQ calibration.

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-speed dual-port SRAM applications.

Compared with IDT72T3615L10BG and IS61WV102418BLL-10BLI, CY7C1512KV18 uniquely delivers 72-Mbit density with true concurrent DDR ports, programmable latency, and echo-clock–assisted timing closure-making it irreplaceable in modern packet-processing architectures demanding >5 Gbps sustained throughput.

Availability

CY7C1512KV18 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and FPGA co-processor cache applications requiring stable component supply across extended product lifecycles.

Supply support for CY7C1512KV18 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 networking, automotive, and industrial systems, with headquarters in San Jose, CA.

CY7C1512KV18 belongs to the QDR® II SRAM product line, engineered specifically for deterministic, high-bandwidth data buffering in full-duplex communication infrastructure where bus turnaround overhead must be eliminated.

FAQ

What is the function of the DOFF pin on CY7C1512KV18?

The DOFF (Data Output OFFset) pin selects read latency mode: when asserted HIGH, it configures the device for 1.5-cycle read latency (optimized for maximum bandwidth); when LOW, it enables 1-cycle latency (minimizing access delay). This setting directly affects internal pipeline staging and must be held stable during operation.

How does the CY7C1512KV18 support depth expansion?

Depth expansion is achieved using RPS (Read Port Select) and WPS (Write Port Select) pins-both active-low. By tying RPS/WPS of multiple devices to unique decode signals, each device responds only to its assigned address range while sharing the same address/data buses, effectively increasing total memory depth without controller modification.

Can CY7C1512KV18 operate with only one clock domain (K-only)?

Yes-CY7C1512KV18 supports single-clock-domain operation where both K and K inputs are tied together, and C/C are driven by the same source. In this mode, read and write operations share timing references, reducing clock routing complexity but sacrificing some concurrency benefits of true dual-clock operation.

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

The ZQ pin connects to an external 240Ω resistor to ground for output driver impedance calibration. This compensates for process, voltage, and temperature variations to maintain consistent HSTL output drive strength. Failure to connect ZQ properly results in signal integrity degradation and timing violations at 700 Mbps DDR rates.