Infineon Technologies CY7C1514KV18-250BZI

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 clock (700 Mbps data rate per port). 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 networking buffers in packet forwarding engines.

For engineers reviewing the CY7C1514KV18 datasheet, CY7C1514KV18 pinout, CY7C1514KV18 application, or CY7C1514KV18 equivalent, key selection criteria include burst depth (2-word), x36 bus width, FBGA-165 package compatibility, HSTL-15/18 I/O support, and concurrent read/write transaction capability in telecom line cards.

Technical Context

The CY7C1514KV18 implements true QDR II architecture with physically independent read and write data paths-no bus turnaround required. Its dual-clock domain uses K/K for address/data capture and C/C (or CQ/CQ) for output timing, enabling precise DDR edge alignment and skew mitigation in 10G+ systems.

Internally, it employs synchronous self-timed writes, programmable impedance termination (ZQ), JTAG 1149.1 boundary scan, and a PLL that locks to K input to generate internal timing for 1.5-cycle read latency. Address latching occurs on alternating rising edges of K, supporting full-depth expansion via four BWS signals (BWS[3:0]).

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, JEDEC MO-270AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and IS61WV102436B, the CY7C1514KV18 uniquely balances 250 MHz QDR II performance, flexible 1.4–1.8V I/O, ZQ calibration, and DOFF-configurable latency-making it optimal for new telecom and networking designs requiring timing precision and power scalability.

Availability

CY7C1514KV18 is available at Aetrix Electronics and suitable for high-speed packet buffering, network processor interfacing, and telecom line card memory 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) is a U.S.-based semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial and communications infrastructure.

The QDR II SRAM product line-including CY7C1514KV18-is designed specifically for ultra-low-latency, high-throughput memory subsystems in networking equipment, baseband processing, and real-time signal buffering applications.

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 for improved timing margin in high-speed systems; when LOW, it selects 1-cycle latency for minimal pipeline delay. This setting directly affects the number of clock cycles between address assertion and valid Q[35:0] output, and must be set before initialization.

Does CY7C1514KV18 support JTAG boundary scan testing?

Yes, CY7C1514KV18 fully complies with IEEE 1149.1 (JTAG) standard. It includes TDI, TDO, TCK, and TMS pins, plus an internal boundary scan register supporting interconnect testing of all 165 balls. The JTAG feature can be disabled via configuration fuse if unused, reducing test pin count in production.

How does the ZQ pin operate for impedance calibration?

The ZQ pin connects to a 240Ω ±1% external resistor to ground. During calibration, the device measures this reference to adjust its internal HSTL output driver impedance, ensuring matched termination across all D[35:0] and Q[35:0] pins. Calibration occurs automatically at power-up and can be retriggered via JTAG command.

Can CY7C1514KV18 operate with different supply voltages on VDD and VDDQ?

Yes-VDD must be 1.8V ±0.1V for core logic, while VDDQ may range from 1.4V to 1.8V to match interfacing devices (e.g., 1.5V FPGA I/O banks). This dual-supply flexibility allows seamless integration into mixed-voltage systems without level shifters, provided VDDQ ≥ VDD − 0.3V per datasheet limits.