Cypress Semiconductor Corp CY7C1512KV18-300BZI

Overview

CY7C1512KV18 from Cypress Semiconductor is a 4M × 18-bit (72-Mbit), 300 MHz QDR® II SRAM with separate read/write ports, DDR interfaces on both ports (600 Mbps per pin), 1.8V core supply, and 1.4–1.8V I/O supply. It delivers concurrent high-bandwidth memory access for network packet buffering in telecom line cards.

For engineers reviewing the CY7C1512KV18 datasheet, CY7C1512KV18 pinout, CY7C1512KV18 application, or CY7C1512KV18 equivalent, key selection criteria include burst depth (2-word), read latency (1.5 cycles with DOFF HIGH), echo clock support (CQ/CQ), PLL-based timing alignment, and FBGA-165 package compatibility with high-speed PCB layout constraints.

Technical Context

This SRAM implements true dual-port synchronous pipelined architecture: independent K/K clocks drive write address/data latching, while C/C clocks control output register timing. The internal PLL synchronizes data placement to minimize skew across 18-bit wide DDR outputs.

It supports byte-write select (BWS[1:0]) for partial-word writes and uses echo clocks (CQ/CQ) to enable source-synchronous capture at the receiver. DOFF pin configures read latency between 1-cycle (QDR I mode) and 1.5-cycle (QDR II mode), preserving backward compatibility while enabling higher bandwidth.

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 dual-port SRAM applications.

Compared with AS7C3256A-15JCIN and IS61WV102418BLL-10BLI, CY7C1512KV18 uniquely delivers 600 MB/s concurrent bandwidth, source-synchronous echo clocks, and configurable latency-critical for data-plane memory in telecom infrastructure where deterministic timing and zero bus turnaround are mandatory.

Availability

CY7C1512KV18 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, baseband processing memory, and test equipment pattern memory 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 communications, industrial, and automotive markets.

CY7C1512KV18 belongs to the QDR® II SRAM product line, engineered specifically for zero-turnaround, high-bandwidth data-path buffering in networking and telecommunications infrastructure.

FAQ

What is the function of the DOFF pin on CY7C1512KV18?

The DOFF (Data Out Fast) pin configures read latency mode: when asserted HIGH, it enables 1.5-cycle QDR II latency for optimized bandwidth; when LOW, it reverts to 1-cycle QDR I latency for backward compatibility. This setting is sampled synchronously on the K clock edge at power-up and remains static during operation unless reset.

How does the CY7C1512KV18 handle partial-word writes?

Partial-word writes are controlled by BWS[1:0] (Byte Write Select) inputs: BWS0 enables writing to D[8:0], BWS1 to D[17:9]. Both are active-low and sampled on K/K rising edges. Unselected bytes retain prior contents, eliminating need for read-modify-write cycles and preserving data coherency during concurrent access.

Can CY7C1512KV18 operate with only one clock domain?

Yes - in Single Clock Mode, the device accepts identical K and C clocks (with appropriate phase alignment), using K for both address/data latching and output register control. This simplifies clock tree design but forfeits independent read/write timing optimization and echo clock benefits.

What is the role of the CQ and CQ pins?

CQ and CQ are echo clocks - buffered copies of C and C outputs with matched propagation delay to Q[17:0]. They provide source-synchronous timing references at the receiver, enabling reliable capture of DDR data without requiring tight board-level clock-data skew control, especially critical above 300 MHz.