Infineon Technologies CY7C1518V18-200BZC

Overview

CY7C1518V18 from Cypress Semiconductor is a 72-Mbit synchronous pipelined DDR-II SRAM configured as 4M × 18, operating at 200 MHz with 1.8 V core supply and HSTL I/O. It implements 2-word burst reads/writes synchronized to dual K/K input clocks and outputs data aligned to C/C echo clocks (CQ/CQ), enabling precise timing in high-speed memory subsystems for network packet buffering and baseband processing.

For engineers reviewing the CY7C1518V18 datasheet, CY7C1518V18 pinout, CY7C1518V18 application, or CY7C1518V18 equivalent, key selection criteria include its 4M × 18 organization, 200 MHz maximum frequency, 165-ball FBGA package, DLL-assisted data placement, and dual-clock DDR timing architecture supporting burst-aligned 18-bit word transfers.

Technical Context

The CY7C1518V18 uses a synchronous pipelined architecture with internal burst counter driven by external A0, delivering two sequential 18-bit words per access. All synchronous inputs (R/W, LD, BWS[1:0], A[21:0]) are registered on rising edges of K and K clocks, ensuring deterministic setup/hold timing.

Read data is output on Q[17:0] aligned to rising edges of C and C (or K/K in single-clock mode), while echo clocks CQ/CQ-phase-matched to C/C-enable source-synchronous capture at the controller. The integrated Delay Lock Loop (DLL) eliminates clock-data skew across process/voltage/temperature variations.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 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 synchronous SRAM applications.

Compared with IS61WV102418B and 21SPS1618, the CY7C1518V18 uniquely combines 200 MHz DDR-II operation, integrated DLL, and ZQ-calibrated HSTL in a single 165-ball FBGA-enabling robust timing closure in dense, multi-SRAM systems without external tuning components.

Availability

CY7C1518V18 is available at Aetrix Electronics and suitable for telecom infrastructure, high-speed test instrumentation, wireless baseband processing, and broadcast video systems requiring stable component supply and long-term obsolescence management.

Supply support for CY7C1518V18 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 demanding embedded and communications applications.

The CY7C15xxV18 family targets high-bandwidth, low-latency memory subsystems in networking, test, and wireless infrastructure-where DDR-II timing precision, DLL stability, and HSTL signal integrity are critical.

FAQ

What is the minimum supported clock frequency for CY7C1518V18?

The device operates down to DC-no minimum clock frequency is specified. Its synchronous design allows operation at any frequency ≤200 MHz, including static (0 Hz) conditions after initialization. All timing parameters scale linearly with clock period, and DLL remains functional across the full range.

Can CY7C1518V18 operate in single-clock mode without C/C inputs?

Yes. When C and C are tied to K and K respectively, the device operates in single-clock mode. Read data is then driven on K/K rising edges, and CQ/CQ echo clocks track K/K instead of C/C. This simplifies system design when only one clock domain is available, though echo clock deskew capability is lost.

How does ZQ calibration affect signal integrity on the DQ bus?

ZQ calibration adjusts output driver strength to match a 240 Ω external resistor, setting nominal output impedance to 50 Ω (0.2 × 240 Ω). This minimizes reflections on 50 Ω PCB traces, reducing overshoot/undershoot and maintaining eye height >75% at 600 Mbps, as verified in JEDEC HSTL Class I compliance testing.

Is DOFF pin required to be connected for normal operation?

No. DOFF must be pulled HIGH (to VDDQ) for standard operation with DLL enabled. Leaving it unconnected or floating is not allowed; tying it LOW disables the DLL and invalidates all AC timing specifications in the datasheet, requiring full re-characterization of setup/hold windows.