71342SA25PF

Overview

The Renesas Electronics Corporation 71342SA25PF is a high-speed 4K x 8 Dual-Port Static RAM featuring fully asynchronous operation from either port. It provides true dual-ported memory cells allowing simultaneous access to the same location and includes full on-chip hardware support for semaphore signaling between ports. The device operates on a TTL-compatible single 5V power supply with an access time of 25 ns. It is available in a 64-pin TQFP package and supports industrial temperature ranges.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations without external arbitration.
• Integrated semaphore logic block providing hardware-based port arbitration and unassigned flags for inter-port communication control.
• Fully asynchronous operation compatible with systems requiring no wait states or capable of handling contention externally.

Applications

• Systems requiring simultaneous data exchange between two independent processors or controllers.
• High-speed real-time applications where on-chip hardware arbitration eliminates the need for external arbitration logic.
• Industrial equipment utilizing asynchronous parallel memory interfaces for reliable data buffering.

Procurement Notes

Verify component authenticity through authorized distributors as this part may be subject to discontinuation notices. Confirm package integrity and moisture sensitivity levels prior to assembly, ensuring compliance with reflow soldering profiles specified in the official datasheet. Check for specific RoHS status variations depending on manufacturing date codes.

Selection Notes

Select this component when simultaneous bidirectional data transfer is required without external arbitration overhead. Ensure the design accommodates the 5V TTL-compatible voltage levels and verify that the 64-pin TQFP footprint matches the PCB layout constraints. Consider the semaphore feature if hardware-based conflict resolution is preferred over software management.

Part Context

This component belongs to the 71342 series of dual-port SRAMs, designed for applications needing fast, concurrent access to shared memory resources. It complements Renesas' portfolio of memory solutions by offering integrated arbitration features, distinguishing it from standard single-port or non-arbitrated dual-port alternatives in industrial and embedded systems.

Replacement Considerations

Consult official Renesas documentation for verified substitute part numbers. Cross-reference pinouts and electrical characteristics carefully when evaluating potential replacements to ensure functional compatibility with existing semaphore logic and interface requirements.