Infineon Technologies CY7C1514KV18-250BZXI

Overview

CY7C1514KV18 from Cypress Semiconductor is a 72-Mbit QDR® II SRAM with 2M × 36 organization, 1.8V core supply, and 1.4–1.8V I/O supply, supporting 250 MHz operation (40 ns clock period), double data rate interfaces on both read/write ports, and 2-word burst architecture for high-throughput networking buffers in packet switching ASICs.

For engineers reviewing the CY7C1514KV18 datasheet, CY7C1514KV18 pinout, CY7C1514KV18 application, or CY7C1514KV18 equivalent, key selection criteria include its 2M × 36 x18/x36 depth-expansion capability, echo clock (CQ/CQ) support for timing margin recovery, DOFF-configurable 1-cycle vs. 1.5-cycle read latency, and HSTL-compatible variable-drive outputs for 700 Mbps DDR signaling.

Technical Context

This QDR II SRAM implements fully independent synchronous read and write ports sharing a multiplexed address bus, with all inputs registered on rising edges of K/K clocks and outputs registered on C/C clocks - enabling true concurrent access without bus turnaround. Its internal PLL ensures precise data placement relative to echo clocks, critical for >350 MHz system timing closure.

The device supports byte-write select (BWS[3:0]) for granular 8-bit writes across its 36-bit data width, and uses separate port selects (WPS/RPS) to enable depth expansion across multiple devices. DOFF pin configures read latency between 1 cycle (QDR I compatibility) and 1.5 cycles (QDR II optimized mode), directly affecting pipeline depth in high-speed memory controllers.

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 Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T36150 and IS61WV102436B, CY7C1514KV18 uniquely balances 250 MHz DDR performance, configurable latency, and echo-clock timing margin - making it optimal for upgrade paths from QDR I or new designs targeting 10 Gbps-class packet processing.

Availability

CY7C1514KV18 is available at Aetrix Electronics and suitable for packet switching buffers, network processor caches, telecom line card memory, and high-speed test equipment 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) is a U.S.-based semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

CY7C1514KV18 belongs to Cypress's QDR II SRAM product line, designed specifically for high-bandwidth, low-latency buffering in networking and telecommunications infrastructure where deterministic DDR timing and concurrent access 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 1.5-cycle read latency (QDR II mode), optimizing bandwidth efficiency; when LOW, it reverts to 1-cycle latency (QDR I compatibility). This setting directly affects memory controller pipeline depth and must be held stable during operation.

Can CY7C1514KV18 operate with only one clock domain (K and C tied together)?

Yes - the device supports single-clock-domain operation by tying K to C and K to C, as documented in the "Single Clock Mode" section of the datasheet. In this mode, output registers are clocked by the same edges that latch inputs, reducing clock routing complexity at the cost of slightly reduced timing margin compared to dual-clock operation.

How does the BWS[3:0] signal differ from NWS[1:0] in CY7C1514KV18?

BWS[3:0] provides four independent byte-write enables for the 36-bit data bus (each controlling 8 bits), while NWS[1:0] - present only in x8/x9 variants - controls nibble-level (4-bit) writes. CY7C1514KV18 uses BWS exclusively; NWS signals are not implemented and must remain unconnected or tied inactive.

Is the 165-ball FBGA package of CY7C1514KV18 compatible with standard reflow profiles?

Yes - the 165-ball FBGA (13 × 15 × 1.4 mm) follows JEDEC MO-270AB standards and is qualified for lead-free reflow per IPC/JEDEC J-STD-020. Peak temperature must not exceed 260°C for ≤60 seconds, and thermal profile must maintain ramp rates within ±3°C/sec to prevent solder voiding or die cracking.