Infineon Technologies CY7C024-15AXC

Overview

CY7C024-15AXC from Cypress Semiconductor is a 4K × 16-bit true dual-port static RAM with independent asynchronous ports, 15 ns access time, on-chip arbitration logic, and integrated semaphore latches-designed for interprocessor communication in real-time embedded systems requiring deterministic port-to-port handshaking.

For engineers reviewing the CY7C024-15AXC datasheet, CY7C024-15AXC pinout, CY7C024-15AXC application, or CY7C024-15AXC equivalent, key selection criteria include bus width (16-bit per port), master/slave expandability, BUSY/INT flag timing behavior, and PLCC-84 package compatibility with legacy industrial control backplanes.

Technical Context

The CY7C024-15AXC implements fully asynchronous dual-port memory architecture with separate CE/R/W/OE controls per port, enabling concurrent read/write operations to distinct addresses without external arbitration. Its on-chip arbitration resolves contention via BUSY assertion with tBLA = 8 ns and tBLC = 10 ns timing windows.

It integrates eight dedicated semaphore latches accessible via SEM pin, supporting software-controlled resource locking across ports; interrupt flags (INTL/INTR) are triggered by mailbox writes to FFEh/FFFh addresses, with reset-on-read semantics and BUSY-gated activation.

Key Specifications

Pinout & Package

Available in 84-pin Plastic Leaded Chip Carrier (PLCC) with 0.050" lead pitch, lead-free (Pb-free) compliant, suitable for through-hole reflow assembly and socketed prototyping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V25L15PF and CY7C028-15AC, the CY7C024-15AXC uniquely balances legacy PLCC compatibility, integrated arbitration, and minimal power draw - making it optimal for space-constrained, cost-sensitive industrial controllers where firmware simplicity and thermal budget are critical.

Availability

CY7C024-15AXC is available at Aetrix Electronics and suitable for industrial PLC backplane buffering, dual-core DSP co-processor interfaces, and legacy video frame buffer sharing requiring stable component supply and long-term obsolescence management.

Supply support for CY7C024-15AXC 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 programmable systems-on-chip, and USB/USB-C interface solutions for industrial and automotive markets.

The CY7C024 series belongs to Cypress's legacy dual-port SRAM product line, designed specifically for deterministic interprocessor communication in real-time embedded systems where hardware-enforced synchronization is mandatory.

FAQ

What is the function of the M/S pin on CY7C024-15AXC?

The M/S (Master/Slave) pin configures the device's BUSY pin behavior: when HIGH, BUSY pins act as outputs for master-mode arbitration signaling; when LOW, they become inputs for slave-mode operation. This enables seamless 32-bit memory expansion using multiple CY7C024 devices without external logic, with the master's BUSY output directly driving the slave's BUSY input to coordinate write timing.

How do the semaphore latches operate in CY7C024-15AXC?

The CY7C024-15AXC provides eight dedicated hardware semaphore latches accessed via the SEM pin. Writing '0' to a semaphore grants exclusive ownership to that port; writing '1' releases it. The latch state appears mirrored on both ports, ensuring atomic acquire/release. Semaphore access requires SEM assertion and OE/R/W control - no address decoding beyond A0–A2 is needed, and I/O0 carries the control bit.

Can CY7C024-15AXC be used in industrial temperature range applications?

No - the CY7C024-15AXC is rated for Commercial temperature range only (0°C to +70°C). For industrial applications (–40°C to +85°C), the CY7C024-15AXI variant must be used. The 'X' suffix denotes Commercial grade; 'XI' denotes Industrial grade. Electrical specifications including access time and current consumption are identical between grades, but thermal validation differs.

What happens during simultaneous access to the same memory location?

When both ports attempt access to the same address within tPS = 10 ns, on-chip arbitration asserts BUSY on the losing port after tBLA = 8 ns (address-match) or tBLC = 10 ns (CE-low). The winning port proceeds with deterministic timing; the losing port must wait until BUSY deasserts before retrying. No data corruption occurs, and the outcome is guaranteed - unlike uncontrolled contention where results are undefined.