Infineon Technologies CY7C025AV-20AC

Overview

CY7C025AV-20AC from Cypress Semiconductor is an 8K × 16-bit true dual-port static RAM with asynchronous operation, 20 ns access time, 3.3V supply, and integrated on-chip arbitration logic - used in interprocessor communication buffers where simultaneous left/right port access to shared memory is required.

For engineers reviewing the CY7C025AV-20AC datasheet, CY7C025AV-20AC pinout, CY7C025AV-20AC application, or CY7C025AV-20AC equivalent, key selection criteria include bus width expansion capability via Master/Slave mode, semaphore-controlled resource sharing, and low 10 µA ISB3 standby current for power-sensitive embedded systems.

Technical Context

This device implements a fully asynchronous dual-port architecture with independent left/right address buses (A0L–A12L / A0R–A12R), separate control signals per port (CEL/CER, R/WL/R/WR, OEL/OER), and dedicated BUSY/INT/SEM logic to resolve contention and enable inter-port coordination without external arbitration circuitry.

It supports byte-selectable writes using UBL/UBR and LBL/LBR pins, enables mailbox-style interrupt-driven messaging via two top memory locations (1FFE and 1FFF), and provides eight hardware semaphores accessible through SEM-enabled addressing - all within a single 100-pin TQFP package.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Plastic Flatpack (TQFP), 14 mm × 14 mm body, 0.5 mm lead pitch, exposed pad optional.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V25S20PF and IS61LV51216-20TQLI, CY7C025AV-20AC delivers integrated arbitration, mailbox interrupts, and Master/Slave expansion - reducing system-level design effort and component count in tightly coupled dual-processor architectures.

Availability

CY7C025AV-20AC is available at Aetrix Electronics and suitable for interprocessor communication buffers, dual-port video frame buffers, communications protocol stack buffers, and industrial PLC shared memory modules requiring stable component supply and long-term obsolescence planning.

Supply support for CY7C025AV-20AC 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 mixed-signal ICs for embedded control, connectivity, and memory applications, with emphasis on reliability and integration.

CY7C025AV belongs to Cypress's dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor data exchange in real-time embedded systems.

FAQ

What is the maximum operating frequency supported by CY7C025AV-20AC?

The CY7C025AV-20AC does not operate on a clock signal - it is a fully asynchronous dual-port SRAM. Its 20 ns access time defines the minimum cycle period for reliable read/write operations, supporting effective throughput up to approximately 50 MHz in burst-mode applications with proper timing margining.

Can CY7C025AV-20AC be used in a single-port configuration?

Yes - either port (left or right) can be used independently by tying unused control signals (e.g., CER, R/WR, OER) to inactive states. The device retains full functionality as a standard 8K × 16 SRAM when only one port is enabled, with identical timing and power characteristics.

How does the semaphore mechanism prevent race conditions between ports?

Each of the eight semaphores functions as a hardware-set/clear latch: writing '0' locks the resource exclusively to that port; writing '1' releases it. The latch output is mirrored to both ports, and read-back is synchronized to prevent metastability - ensuring atomic acquire/release without software polling loops.

Is the M/S pin required for basic dual-port operation?

No - the M/S pin is optional and only needed when expanding data width beyond 16 bits using multiple devices. In standalone 16-bit operation, M/S may be tied HIGH (master mode) or LEFT floating (per datasheet recommendation), with BUSY pins unused but harmless.