Cypress Semiconductor Corp CY7C1515V18-200BZC

Overview

CY7C1515V18 from Cypress Semiconductor is a 2M × 36-bit (72-Mbit), 1.8V QDR-II SRAM with separate read/write ports, 200 MHz clock operation (400 MT/s effective data rate), DDR interfaces on both ports, and echo clocks (CQ/CQ) for timing margin recovery in high-speed systems. It delivers full data coherency and synchronous self-timed writes in networking packet buffers and FPGA co-processor memory subsystems.

For engineers reviewing the CY7C1515V18 datasheet, CY7C1515V18 pinout, CY7C1515V18 application, or CY7C1515V18 equivalent, key selection criteria include burst depth (4-word), x36 bus width, 165-ball FBGA package, HSTL I/O compatibility, and DLL-controlled output alignment - all critical for deterministic latency in telecom line cards and switch fabric designs.

Technical Context

The CY7C1515V18 implements QDR-II architecture with fully independent read and write pipelines, each clocked by dedicated K/K input pairs and driven by C/C output clocks. Its 512K × 36 internal organization uses 19 address bits (A[18:0]) and supports depth expansion via four byte write selects (BWS[3:0]).

All synchronous inputs latch on rising edges of K/K; outputs are registered to C/C with echo clocks CQ/CQ aligned to output data edges. The integrated Delay Lock Loop (DLL) ensures precise data-to-clock alignment at 200 MHz, while VREF and ZQ pins enable HSTL-15-compatible impedance control and signal integrity tuning.

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 dual-port SRAM applications.

Compared with IDT72T36150 and IS61WV204836B, CY7C1515V18 uniquely balances 200 MHz QDR-II performance, HSTL compatibility, and 165-ball FBGA density - making it optimal for space-constrained, FPGA-centric designs requiring deterministic dual-port behavior.

Availability

CY7C1515V18 is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA acceleration, switch fabric, and high-speed test equipment requiring stable component supply across multi-year production cycles.

Supply support for CY7C1515V18 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, computing, and industrial systems.

CY7C1515V18 belongs to the QDR-II SRAM product line, engineered specifically for deterministic, low-latency, concurrent memory access in packet-processing and FPGA-adjacent architectures.

FAQ

What is the minimum supported clock frequency for CY7C1515V18?

The device operates down to DC - no minimum clock frequency is specified. All timing parameters are defined relative to the K/K input clock edges, and static operation (0 Hz) is supported for initialization and configuration sequences. However, DLL lock requires ≥10 MHz for stable operation.

Can CY7C1515V18 operate in single-clock mode?

Yes. When C and C are tied together and driven by K and K respectively, the device enters single-clock mode. In this mode, Q[35:0] data is clocked by K/K, and CQ/CQ are generated relative to K/K - simplifying clock tree design at the cost of reduced deskew capability.

How does ZQ pin calibration affect output drive strength?

ZQ connects to an external resistor (typically 100 Ω) to ground, setting output driver impedance to 20 Ω (0.2 × 100 Ω). This matches standard 50 Ω transmission lines in parallel-terminated HSTL-15 systems, minimizing reflections and ensuring clean eye diagrams at 400 MT/s.

Is DOFF pin required to be tied high in normal operation?

Yes. DOFF must be pulled high (to VDDQ) to enable the internal DLL. If grounded, the DLL disables and output timing shifts significantly - violating AC specifications in the datasheet. Leaving DOFF floating is not allowed due to potential metastability.