Infineon Technologies CY7C1512AV18-200BZI

Overview

CY7C1512AV18-200BZI from Cypress Semiconductor is a 4M × 18 (72-Mbit), 1.8V QDR® II SRAM with dual independent read/write ports, 200 MHz clock operation (500 MT/s DDR interface), 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 switch fabric controllers.

For engineers reviewing the CY7C1512AV18-200BZI datasheet, CY7C1512AV18-200BZI pinout, CY7C1512AV18-200BZI application, or CY7C1512AV18-200BZI equivalent, key selection criteria include burst depth (2-word), DLL-enabled timing mode, FBGA-165 package footprint, and QDR II-specific echo clock (CQ/CQ) support for source-synchronous data capture.

Technical Context

The CY7C1512AV18-200BZI 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 input registration and C/C for output registration - enabling precise deskewing via complementary 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 write masking via BWS[1:0]. The DLL, controlled by DOFF, shifts read latency from 1 cycle (DLL off, QDR I mode) to 1.5 cycles (DLL on, QDR II mode) while maintaining full data coherency across concurrent accesses.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, RoHS-compliant, 0.8 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and IS61WV102418B, the CY7C1512AV18-200BZI uniquely delivers 500 MT/s DDR throughput with integrated echo clocks and DLL-controlled latency - essential for deterministic, high-throughput packet buffering where timing closure is critical.

Availability

CY7C1512AV18-200BZI is available at Aetrix Electronics and suitable for network switch fabric buffering, high-speed test equipment memory, telecom baseband processing, and avionics data recorder buffer applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for CY7C1512AV18-200BZI 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 fabless semiconductor company specializing in high-performance memory, microcontrollers, and programmable solutions for industrial, automotive, and communications markets.

The CY7C1512AV18 belongs to Cypress's QDR II SRAM product line, engineered specifically for deterministic, low-latency, concurrent-access memory subsystems in networking and test instrumentation where bus turnaround overhead must be eliminated.

FAQ

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

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 reduced maximum frequency (≤167 MHz). For full QDR II performance at 200 MHz, DOFF must be pulled HIGH via ≤10 kΩ resistor to VDDQ.

How does the ZQ pin affect output driver strength?

The ZQ pin connects to an external resistor (RQ) tied to ground, enabling on-die calibration of output driver impedance. The device sets CQ, CQ, and Q[17:0] output impedance to 0.2 × RQ. If RQ = 50 Ω, output impedance becomes 10 Ω - matching typical 50 Ω transmission lines. Direct connection to VDDQ enables minimum impedance mode.

Can CY7C1512AV18-200BZI operate with a single clock domain?

Yes - the device supports single-clock mode using only K/K for both input registration and output timing. In this mode, Q[17:0] is clocked by K/K instead of C/C, and CQ/CQ are generated relative to K/K. This simplifies clock routing but sacrifices the deskew advantage of dedicated output clocks.

What is the purpose of BWS[1:0] in CY7C1512AV18-200BZI?

BWS[1:0] are active-low byte write select signals that gate D[8:0] (BWS0) and D[17:9] (BWS1) during write operations. When asserted, they enable writing to their respective 9-bit byte lanes; when deasserted, those bytes retain prior contents. This allows partial-word updates without read-modify-write cycles, critical for metadata field edits in packet buffers.