71342SA25JI8

Overview

The Renesas Electronics Corporation 71342SA25JI8 is a high-speed 32Kb (4K x 8) dual-port static random-access memory (SRAM). It features fully asynchronous parallel operation with a 25 ns access time. The device operates on a single 5V power supply ranging from 4.5V to 5.5V and includes on-chip semaphore logic for hardware port arbitration. It is housed in a 52-pin PLCC package.

Feature Summary

• True dual-ported memory cells enabling simultaneous independent access to the same memory location from either port.
• Integrated hardware semaphore signaling block for automatic arbitrating between ports without external logic.
• Fully asynchronous operation allowing flexible interface timing requirements for both read and write cycles.

Applications

• High-speed data buffering in telecommunications equipment requiring low-latency transfer.
• Real-time processing systems where simultaneous data access by multiple processors is required.
• Industrial control systems utilizing asynchronous parallel memory interfaces.

Procurement Notes

This component is officially discontinued and no longer in production. Availability is restricted to existing stock or secondary market sources. Verify RoHS compliance status, as older batches may not meet current environmental standards. Confirm package integrity and authenticity through authorized channels before integration into new designs.

Selection Notes

Select this part only if legacy compatibility with the 71342 series architecture is mandatory. Ensure the design supports 52-pin PLCC surface mount technology. Consider that newer alternatives may offer improved power efficiency or smaller footprints while maintaining functional equivalence for dual-port applications.

Part Context

The 71342 series represents a family of high-speed dual-port SRAMs designed for applications requiring concurrent access. This specific variant integrates semaphore logic, distinguishing it from non-semaphore models like the 7134. It serves as a bridge between standard SRAM and complex FIFO solutions in multi-master bus architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available due to discontinuation. Review the 71342LA or 71342SB variants for potential pin-compatible options within the same family, subject to availability and specification matching.