Cypress Semiconductor Corp CY7C1512AV18-200BZXC

Overview

CY7C1512AV18-200BZXC 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), 1.5-cycle read latency (DLL enabled), and HSTL I/O interface. It delivers concurrent high-bandwidth memory access for network packet buffering in telecom line cards.

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

Technical Context

This device implements a synchronous pipelined QDR II architecture with physically separate read and write data paths, eliminating bus turnaround overhead. It uses dual differential input clocks (K/K) for address/data capture and dual output clocks (C/C) with echo clocks (CQ/CQ) to deskew flight time across high-speed memory buses.

All synchronous inputs-including RPS, WPS, BWS[1:0], and A[20:0]-are registered on K/K rising edges; all outputs (Q[17:0]) are edge-aligned to C/C. The internal Delay Lock Loop (DLL) enables precise 1.5-cycle read latency at 200 MHz, while DOFF pin control allows fallback to QDR I mode (1-cycle latency, ≤167 MHz).

Key Specifications

Pinout & Package

165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm footprint, 1.4 mm height, 0.8 mm ball pitch. Compliant with JEDEC MO-245AC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C362000B-200BIN and IS61WV102418B-200BLI, CY7C1512AV18-200BZXC uniquely delivers true dual-port DDR bandwidth with integrated echo clocks and impedance tuning-critical for scalable, multi-device, source-synchronous memory subsystems in networking and test equipment.

Availability

CY7C1512AV18-200BZXC is available at Aetrix Electronics and suitable for network packet buffering, switch fabric memory, baseband processing buffers, and ATE pattern memory requiring stable component supply across extended temperature and long-lifecycle programs.

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

CY7C1512AV18 belongs to the QDR II SRAM product line, engineered specifically for deterministic, low-latency, concurrent memory access in high-speed packet-switched infrastructure.

FAQ

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

The DOFF pin disables the internal Delay Lock Loop (DLL) when pulled LOW. In DLL-off mode, the device operates as a QDR I SRAM 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 tied HIGH via a ≤10 kΩ pull-up resistor 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 pins to match the system data bus characteristic impedance (Z₀). Connecting ZQ to ground through an external resistor RQ sets output impedance to 0.2 × RQ; connecting directly to VDDQ enables minimum-impedance mode. This eliminates need for external series termination and improves eye diagram margin at 500 MT/s.

Can CY7C1512AV18-200BZXC operate with only one clock pair instead of two?

Yes-CY7C1512AV18-200BZXC supports single-clock mode using only K/K to control both input and output registers. In this mode, C/C are unused, and Q[17:0] timing is referenced to K/K. However, echo clocks (CQ/CQ) remain active and synchronized to K/K, preserving source-synchronous capture capability at the controller.

What is the role of BWS[1:0] in byte-write operations?

BWS0 and BWS1 are active-LOW byte write select signals that determine which 9-bit sub-byte of D[17:0] is written during each half of the 2-word burst. BWS0 controls D[8:0], BWS1 controls D[17:9]. When a BWS signal is deasserted, the corresponding byte remains unaltered-enabling efficient read-modify-write sequences without full-word reads.