Cypress Semiconductor Corp CY7C1514KV18-300BZXI

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, supporting concurrent read/write operations via independent ports in high-bandwidth networking and packet buffering applications.

For engineers reviewing the CY7C1514KV18 datasheet, CY7C1514KV18 pinout, CY7C1514KV18 application, or CY7C1514KV18 equivalent, key selection criteria include DDR interface timing at 700 Mbps effective data rate, 1.5-cycle read latency (DOFF = HIGH), echo clock (CQ) support for high-speed data capture, and 165-ball FBGA package compatibility with depth expansion using BWS[3:0] and port selects.

Technical Context

The CY7C1514KV18 implements QDR II architecture with fully independent read and write ports sharing a multiplexed address bus, enabling true concurrent access without bus turnaround. It uses separate K/K clocks for address/data latching and C/C clocks for output timing, with echo clocks (CQ/CQ) aligned to output data edges.

Internally, it features synchronous self-timed writes, programmable impedance (ZQ), JTAG 1149.1 boundary scan, and a PLL for precise data placement. Read latency is configurable: 1.5 cycles when DOFF is HIGH (QDR II mode) or 1 cycle when DOFF is LOW (QDR I compatibility mode).

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, RoHS-compliant, with 0.8 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG, CY7C1514KV18 offers higher bandwidth (700 vs. 200 Mbps) and echo-clock simplicity but less jitter immunity; versus IS61WV204836BLL-15BLI, it delivers 2.3× more throughput and true concurrency at the cost of greater layout and timing complexity.

Availability

CY7C1514KV18 is available at Aetrix Electronics and suitable for packet buffering in Ethernet switches, line card memory in telecom routers, and real-time video frame buffering requiring stable component supply across extended product 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 networking, automotive, and industrial applications, with emphasis on signal integrity and timing precision.

CY7C1514KV18 belongs to the QDR II SRAM product line, engineered specifically for deterministic, high-bandwidth memory access in packet-switched infrastructure where concurrent read/write and sub-100 ns latency are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1514KV18?

The DOFF (Data Output OFF) pin configures read latency mode: when asserted HIGH, it enables QDR II operation with 1.5-cycle latency for optimized bandwidth and timing margin; when LOW, it reverts to QDR I compatibility mode with 1-cycle latency. This setting is sampled synchronously on the K clock and affects all subsequent read operations until changed.

How does the BWS[3:0] signal work in byte-selectable writes?

BWS[3:0] are four active-LOW signals that independently enable writing to each 9-bit byte group within the 36-bit D[35:0] bus: BWS0 → D[8:0], BWS1 → D[17:9], BWS2 → D[26:18], BWS3 → D[35:27]. Only selected bytes are updated; unselected bytes retain prior contents, eliminating need for read-modify-write sequences in partial updates.

Can CY7C1514KV18 operate with a single clock domain instead of separate K/K and C/C pairs?

Yes - the device supports single-clock mode where K and C are tied together (and K and C tied together), with outputs registered on the same clock edges. In this configuration, echo clocks (CQ/CQ) remain functional but align to the shared clock, reducing skew compensation flexibility while simplifying clock distribution in less demanding systems.

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

ZQ is the impedance calibration reference pin for on-die termination. It must be connected to a precision 240 Ω resistor tied to ground to calibrate internal HSTL output drivers. Calibration occurs automatically at power-up and can be triggered manually via JTAG; incorrect ZQ termination causes output drive mismatch and signal integrity degradation.