71342SA55J8

Overview

The 71342SA55J8 is a high-speed 32Kbit (4K x 8) dual-port asynchronous static random-access memory manufactured by Renesas Electronics. It features a 55 ns access time and operates on a single 5V TTL-compatible power supply within the 4.5V to 5.5V range. The device utilizes a 52-pin PLCC package with dimensions of 19.13x19.13 mm. Designed for commercial applications, it supports an operating temperature range of 0°C to +70°C. The component includes fully independent semaphore logic for port arbitration and offers automatic power-down capabilities.

Feature Summary

• True dual-ported memory architecture enabling simultaneous access to identical memory locations from both ports without conflict.
• Integrated hardware semaphore signaling block that facilitates efficient data arbitration and control between the two independent ports.
• Fully asynchronous operation allows flexible timing requirements for both read and write cycles across either port interface.

Applications

• High-speed data buffering in telecommunications equipment requiring concurrent port access
• Industrial control systems utilizing parallel memory interfaces for real-time processing
• Embedded systems requiring dedicated semaphore-based resource management between processors

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and lead condition prior to installation. Ensure compliance with RoHS directives if required by your specific application standards. Check moisture sensitivity level handling procedures during storage and assembly. Validate electrical specifications against current datasheet revisions before final design integration.

Selection Notes

Select this component when simultaneous independent access to shared memory is required. The 55 ns speed suits moderate-to-high frequency asynchronous applications. Consider the 52-PLCC package constraints for PCB layout. Evaluate thermal performance within the commercial temperature range. Compare against faster variants like the LA series if higher speeds are needed.

Part Context

This part belongs to the Renesas 71342 family of dual-port SRAMs. It shares architectural similarities with other members like the 71342LA series but differs in speed grade and temperature rating. The SA suffix typically denotes standard commercial grade performance. It serves as a legacy solution for parallel memory interfacing in established industrial designs.

Replacement Considerations

Public confirmed substitute: 71342LA25PFGI. Verify pin compatibility and electrical parameter alignment before substitution.