Infineon Technologies CY7C1512AV18-200BZC

Overview

CY7C1512AV18-200BZC from Cypress Semiconductor is a 4M × 18 (72-Mbit), 1.8V QDR® II SRAM with dual independent read/write ports, 200 MHz clock operation (400 MT/s DDR), 1.5-cycle read latency with DLL enabled, and HSTL I/O compatible with VDDQ = 1.4–1.8V. It delivers concurrent high-bandwidth memory access for network packet buffering in telecom line cards.

For engineers reviewing the CY7C1512AV18-200BZC datasheet, CY7C1512AV18-200BZC pinout, CY7C1512AV18-200BZC application, or CY7C1512AV18-200BZC equivalent, key selection criteria include burst depth (2-word), echo clock support (CQ/CQ), byte write select (BWS[1:0]), DLL-controlled latency mode, and 165-ball FBGA (15 × 17 mm) mechanical compatibility.

Technical Context

The CY7C1512AV18-200BZC implements a synchronous pipelined QDR II architecture with physically separate read and write data paths, eliminating bus turnaround overhead. Its dual-clock domain uses K/K for address/data capture and C/C for output timing, enabling precise skew management via echo clocks CQ/CQ referenced to C/C.

Internally organized as two 2M × 18 arrays, it supports depth expansion via RPS/WPS port selects and byte-level writes using BWS[1:0] to control D[8:0] and D[17:9]. The DLL enables 1.5-cycle read latency at 200 MHz; when disabled via DOFF, it reverts to QDR I timing with 1-cycle latency up to 167 MHz.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm footprint, 1.4 mm height, 1.0 mm ball pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar QDR II SRAM applications.

Compared with IDT72T3615L10BG and IS61WV102418B, the CY7C1512AV18-200BZC uniquely combines x18 DDR concurrency, programmable DLL latency, echo-clock–assisted capture, and 165-ball FBGA compatibility-making it optimal for upgrade paths from QDR I or migration from legacy asynchronous SRAM in high-speed networking.

Availability

CY7C1512AV18-200BZC is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and baseband processing cache requiring stable component supply and long-term industrial availability.

Supply support for CY7C1512AV18-200BZC 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, automotive, and industrial systems.

The QDR® II SRAM product line targets high-speed deterministic memory interfaces in networking infrastructure, specifically addressing bandwidth-constrained applications requiring zero-turnaround concurrent access.

FAQ

What is the function of the DOFF pin on CY7C1512AV18-200BZC?

The DOFF (DLL Turn Off) pin is an active-LOW control that disables the internal Delay Lock Loop. When pulled LOW, the device operates in QDR I mode with 1-cycle read latency and maximum frequency reduced to 167 MHz. For standard QDR II operation at 200 MHz with 1.5-cycle latency, DOFF must be held HIGH via a ≤10 kΩ pull-up to VDDQ.

How does the ZQ pin affect signal integrity in high-speed designs?

The ZQ pin calibrates the output driver impedance of Q[17:0], CQ, and CQ to match the PCB trace impedance. Connecting ZQ to a precision resistor (e.g., 50 Ω) to ground sets output impedance to 10 Ω (0.2 × RQ). This minimizes reflections and improves eye diagram margins at 400 MT/s, especially critical in multi-drop or fly-by routing topologies.

Can CY7C1512AV18-200BZC operate in single-clock mode?

Yes - by connecting C and C to K and K respectively, the device enters single-clock mode. In this configuration, K/K clocks both input registers (D[17:0], A[20:0], RPS, WPS) and output registers (Q[17:0]). All timing references shift to K/K, and echo clocks CQ/CQ track K/K instead of C/C. This simplifies clock tree design but forfeits C/C deskew capability.

What is the purpose of BWS[1:0] in write operations?

BWS[1:0] are active-LOW byte write select signals that gate which 9-bit segments of D[17:0] are written: BWS0 controls D[8:0], BWS1 controls D[17:9]. When either is deasserted, the corresponding byte remains unaltered in memory. This enables efficient read-modify-write sequences without full-word reads, reducing bus traffic in partial-update scenarios like header editing in packet buffers.