Cypress Semiconductor Corp CY7C1512AV18-167BZXI

Overview

CY7C1512AV18-167BZXI from Cypress Semiconductor is a 4M × 18 (72-Mbit), 1.8V QDR® II SRAM with dual independent read/write ports, 167 MHz maximum operating frequency, 1.5-cycle read latency (DLL enabled), and HSTL I/O interface. It delivers 500 MT/s effective data rate via DDR interfaces on both ports and is packaged in a 165-ball FBGA (15 × 17 × 1.4 mm) for high-speed networking buffer applications.

For engineers reviewing the CY7C1512AV18-167BZXI datasheet, CY7C1512AV18-167BZXI pinout, CY7C1512AV18-167BZXI application, or CY7C1512AV18-167BZXI equivalent, key selection criteria include burst timing alignment, echo clock (CQ/CQ) support for source-synchronous capture, DLL-enabled latency mode, byte write select (BWS0/BWS1) granularity, and VDDQ = 1.4V–1.8V I/O voltage compatibility.

Technical Context

This QDR II SRAM implements fully synchronous, pipelined architecture with separate K/K input clocks for address/data capture and C/C output clocks for data launch - enabling precise DDR timing without bus turnaround. Its internal 2-array organization (2 × 2M × 18) supports concurrent read and write operations on shared address bus with no contention.

The device uses on-chip Delay Lock Loop (DLL) to align CQ/CQ echo clocks with output data edges, reducing setup/hold margin requirements at 167 MHz. When DOFF = LOW, it reverts to QDR I mode with 1-cycle latency and relaxed timing, retaining full pin and functional compatibility.

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-bandwidth dual-port SRAM applications.

Compared with IS61WV102418B and MT47H64M16HR, CY7C1512AV18-167BZXI uniquely delivers deterministic 167 MHz burst throughput with zero-refresh, no-command overhead, and hardware-managed read/write independence - essential for real-time packet processing pipelines.

Availability

CY7C1512AV18-167BZXI is available at Aetrix Electronics and suitable for high-speed network switch buffers, packet classification engines, baseband digital front-end buffers, and PCIe Gen3 descriptor caches requiring stable component supply across multi-year production cycles.

Supply support for CY7C1512AV18-167BZXI 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, with focus on signal integrity and timing-critical applications.

CY7C1512AV18 belongs to the QDR II SRAM product line, engineered specifically for deterministic, low-latency, concurrent-access memory subsystems in networking ASICs, FPGAs, and protocol accelerators.

FAQ

What is the function of the DOFF pin on CY7C1512AV18-167BZXI?

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 relaxed timing specifications, maintaining full pin and functional compatibility. For standard QDR II operation at 167 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 output drive strength?

The ZQ pin calibrates the output driver impedance of Q[17:0], CQ, and CQ pins to match the system data bus. Connecting ZQ to a resistor (RQ) to ground sets output impedance to 0.2 × RQ. Alternatively, tying ZQ directly to VDDQ enables minimum-impedance mode. ZQ must never be left floating or tied to VSS, as this disables calibration and risks signal integrity failure.

Can CY7C1512AV18-167BZXI operate with only one clock pair?

Yes - the device supports single-clock mode using only K/K for both input registration and output timing. In this mode, Q[17:0] data is launched on K/K edges instead of C/C, and CQ/CQ are generated relative to K/K. This simplifies clock distribution but sacrifices the deskewing benefit of dedicated output clocks and may reduce timing margin at 167 MHz.

What is the role of BWS0 and BWS1 in write operations?

BWS0 and BWS1 are active-low byte write selects that control which 9-bit segments of D[17:0] are written during each 2-word burst. BWS0 governs D[8:0], BWS1 governs D[17:9]. When either is deasserted, the corresponding byte remains unaltered - enabling efficient partial-word updates (e.g., modifying packet headers without rewriting payload) without external read-modify-write logic.