71342SA25PFI8

Overview

The 71342SA25PFI8 is a high-speed, 32Kb (4K x 8) dual-port static random-access memory manufactured by Renesas Electronics Corporation. It features fully asynchronous parallel operation with independent access from either port and includes on-chip semaphore logic for hardware arbitration. The device operates within a supply voltage range of 4.5V to 5.5V and supports an industrial temperature range of -40°C to +85°C. It utilizes a 64-pin TQFP surface-mount package with a 25ns access time.

Feature Summary

• True dual-ported memory architecture allowing simultaneous independent access to the same memory location from both ports.
• Integrated hardware semaphore signaling block for automatic arbitration between ports without software intervention.
• Fully asynchronous operation compatible with TTL-level single 5V power supply requirements.

Applications

• Real-time data buffering in industrial control systems requiring concurrent host and peripheral access.
• High-speed cache memory in embedded processing architectures.
• Data logging applications utilizing battery backup capabilities for data retention.

Procurement Notes

This component is officially obsolete and no longer manufactured by Renesas Electronics Corporation. Verification of availability is restricted to existing stock held by distributors or surplus markets. Procurement requires confirmation of lot dates and physical condition due to end-of-life status. Replacement components must be evaluated for pin compatibility and electrical specifications before integration into active designs.

Selection Notes

Designers should consider the 71342LA25PFGI8 as a verified upgrade alternative offering enhanced environmental compliance while maintaining functional equivalence. Selection criteria must account for the transition from leaded to lead-free soldering processes if applicable. Verify that the replacement package dimensions match the existing footprint to ensure mechanical compatibility during board requalification.

Part Context

The 71342SA series belongs to Renesas' legacy portfolio of high-performance dual-port SRAMs designed for demanding real-time applications. These devices are characterized by their ability to support complex multi-master environments through dedicated semaphore logic. The SA suffix denotes standard commercial/industrial variants within the broader 71342 family, which also includes LA and other speed grades.

Replacement Considerations

The 71342LA25PFGI8 is listed as a direct upgrade substitute. Ensure that the RoHS compliance status of the replacement aligns with regulatory requirements for the target application. Electrical parameters such as access time and voltage ranges remain consistent, facilitating drop-in replacement where mechanical constraints allow.