Infineon Technologies CY7C024AV-15AXI

Overview

CY7C024AV-15AXI from Cypress Semiconductor is a 3.3V, 4K × 16 true dual-port static RAM with independent left/right ports, 20 ns access time, on-chip arbitration logic, and semaphore support-designed for interprocessor communication in real-time embedded systems requiring deterministic memory contention resolution.

For engineers reviewing the CY7C024AV-15AXI datasheet, CY7C024AV-15AXI pinout, CY7C024AV-15AXI application, or CY7C024AV-15AXI equivalent, key selection criteria include simultaneous port access timing, BUSY/INT/SEM signal behavior, master/slave expandability, and industrial temperature operation (–40°C to +85°C) in 100-pin TQFP packaging.

Technical Context

This device implements fully asynchronous dual-port SRAM architecture with separate address, data, and control buses per port (A0L–A11L/I/O0L–I/O15L/R/WL/OEL/CEL vs. A0R–A11R/I/O0R–I/O15R/R/WR/OER/CER), enabling concurrent read/write operations without external synchronization.

On-chip arbitration resolves memory location contention via BUSYL/BUSYR signals with tBLA = 6 ns and tBLC = 8 ns response; semaphores use dedicated latches (A0–A2 decoded) accessible via SEML/SEMR with tSWRD = 12 ns write delay and tDOE = 15 ns output enable timing.

Key Specifications

Pinout & Package

Package: 100-pin Lead (Pb)-free Thin Quad Flat Pack (TQFP), body size 14 mm × 14 mm, 0.5 mm lead pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V25L15PF and IS61WV25616EDBLL-10MLI, CY7C024AV-15AXI uniquely integrates BUSY/INT/SEM logic for autonomous multiprocessor coordination - reducing firmware complexity and improving determinism in real-time embedded systems where 4K×16 capacity suffices.

Availability

CY7C024AV-15AXI is available at Aetrix Electronics and suitable for industrial PLCs, dual-processor motion controllers, video overlay modules, and telecom line cards requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for CY7C024AV-15AXI 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-reliability memory, PSoC, and USB solutions for industrial and automotive markets.

CY7C024AV belongs to Cypress's legacy dual-port SRAM product line, engineered specifically for deterministic interprocessor communication in real-time control systems where hardware arbitration and low-latency signaling are critical.

FAQ

What is the function of the M/S pin, and how does it affect BUSY pin behavior?

The M/S pin configures CY7C024AV-15AXI as master (M/S = HIGH) or slave (M/S = LOW). In master mode, BUSYL and BUSYR are outputs that signal arbitration results to downstream slaves; in slave mode, they become inputs accepting BUSY signals from a master device. This enables seamless 32-bit memory expansion without external logic or timing-critical wiring.

How do the semaphore latches operate, and what is their address mapping?

The eight semaphore latches are accessed via SEML/SEMR with A0–A2 selecting the latch (0–7); only I/O0 is used for writing control bits. Writing '0' claims the latch; reading returns the current state. Semaphores reside in a separate address space - not in main memory - and are isolated from contention effects, ensuring reliable resource locking between ports.

Can INTL and INTR be used simultaneously for bidirectional messaging, and how is interrupt clearing handled?

Yes: INTL asserts when the right port writes to address FFEh (left mailbox); INTR asserts when the left port writes to FFh (right mailbox). Each interrupt clears automatically upon reading its respective mailbox location - no software reset required. Both ports can monitor each other's mailboxes without affecting interrupt state, enabling robust handshake protocols.

What are the timing requirements for a successful semaphore write-and-read sequence?

After asserting SEML (or SEMR) and writing '0' to I/O0, OE must be deasserted for ≥tSOP = 10 ns before reading the semaphore. The written value appears at outputs after tSWRD + tDOE = 12 ns + 15 ns = 27 ns. Concurrent semaphore access within tSPS = 5 ns may resolve unpredictably - applications must implement retry logic for contested acquisitions.