71342LA25JI

Overview

The Renesas Electronics Corporation 71342LA25JI is a high-speed 32 Kbit (4K x 8) dual-port static random access memory. It features fully asynchronous parallel operation with a 25 ns access time and operates on a single 5V power supply ranging from 4.5 V to 5.5 V. The device utilizes true dual-ported memory cells allowing simultaneous independent access to the same location. It includes an on-chip semaphore logic block for hardware arbitration between ports and supports battery backup data retention at 2V. The component is housed in a 52-pin PLCC package.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations by two separate ports.
• Integrated semaphore signaling logic providing full on-chip hardware support for port arbitration and flag control.
• Asynchronous interface design compatible with standard TTL-compatible single 5V power supplies.

Applications

• High-speed data buffering in telecommunications equipment
• Real-time processing systems requiring concurrent read/write operations
• Industrial control systems utilizing dual-processor architectures

Procurement Notes

Verify the specific suffix JI against official Renesas documentation to confirm pinout compatibility and package dimensions. Confirm RoHS compliance status as legacy variants may differ. Check current production lifecycle status, as this part number may be subject to discontinuation or obsolescence notices. Ensure moisture sensitivity level handling protocols are followed during assembly.

Selection Notes

Select this component when a system requires independent dual-port access to a 32 Kbit memory space without external arbitration circuitry. The 25 ns speed suits moderate-to-high frequency applications. Verify that the 52-pin PLCC footprint matches the target PCB layout. Consider the semaphore feature if direct hardware handshaking between processors is required instead of software-based locking mechanisms.

Part Context

This device belongs to the 71342LA series of dual-port SRAMs manufactured by Renesas Electronics. The series is characterized by CMOS technology and dedicated semaphore logic for efficient multi-processor communication. It serves as a specialized memory solution for applications demanding high throughput and low latency in bidirectional data transfer scenarios.

Replacement Considerations

IDT71342LA25JI is a confirmed equivalent part number under the Integrated Device Technology brand, which was acquired by Renesas. Cross-reference datasheets to ensure identical electrical characteristics and mechanical dimensions before substitution.