71342SA55JI

Overview

The Renesas Electronics Corporation 71342SA55JI is a high-speed, 32-kbit (4K x 8) dual-port static random-access memory (SRAM). It features fully asynchronous parallel operation with a maximum access time of 55 ns. The device operates on a single 5V TTL-compatible power supply ranging from 4.5 V to 5.5 V. It is housed in a 52-pin PLCC package and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• True dual-ported memory cells enabling simultaneous independent access to the same memory location from both ports.
• Integrated hardware semaphore logic block for automatic arbitration and signaling between the two ports.
• Fully asynchronous interface allowing flexible timing control without external clock synchronization.

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded systems
• Data storage in industrial automation controllers

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as older variants may not meet current environmental standards. Check moisture sensitivity level handling requirements during assembly. Validate that the specific suffix corresponds to the required package and temperature grade for your design.

Selection Notes

Select this component when true dual-port functionality with hardware semaphore support is required for concurrent data access. Ensure the 55 ns access time meets system latency requirements. Verify compatibility with 5V logic levels and confirm the 52-pin PLCC package fits the PCB layout constraints.

Part Context

This part belongs to the IDT/Renesas 71342 family of dual-port SRAMs. It shares architectural similarities with other members like the 71342LA series but differs in speed grades and temperature ranges. The 'SA' designation typically indicates standard commercial or industrial variants within the broader dual-port memory portfolio.

Replacement Considerations

Public confirmed substitute: 71342LA25PFGI. This alternative offers faster 25 ns access times and is available in a 64-TQFP package. Verify pinout compatibility and voltage specifications before substitution.