71342LA35J8

Overview

The Renesas Electronics Corporation 71342LA35J8 is a high-speed 4K x 8 Dual-Port Static RAM. It features fully asynchronous operation from either port and includes on-chip hardware support for semaphore signaling between ports. The device operates with a TTL-compatible single 5V power supply, supporting battery backup data retention at 2V. It is housed in a 64-pin TQFP package and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• True dual-ported memory cells allow simultaneous access to the same memory location from both ports without conflict.
• Fully asynchronous operation enables independent control and timing for each port interface.
• Integrated hardware semaphore logic facilitates arbitration and communication between the two ports.

Applications

• High-speed data buffering in parallel processing systems
• Real-time signal processing applications requiring low latency
• Industrial equipment control systems

Procurement Notes

Verify component authenticity through authorized channels due to potential availability constraints. Confirm package integrity and moisture sensitivity handling procedures prior to assembly. Ensure design compatibility with existing semaphore logic requirements. Review datasheet specifications for electrical characteristics and thermal limits before final integration.

Selection Notes

Select this component when simultaneous independent access to shared memory is required. The integrated semaphore logic simplifies multi-port arbitration compared to discrete solutions. Verify that the 64-pin TQFP package fits the target PCB layout. Ensure the system voltage aligns with the specified 5V TTL-compatible supply requirements.

Part Context

This part belongs to the 71342 series of dual-port SRAMs designed for high-performance embedded applications. It serves as a versatile memory solution where concurrent read/write operations are critical. The series offers various speed grades and package options to suit different system architectures and environmental conditions.

Replacement Considerations

Direct substitutes include other 4K x 8 dual-port SRAMs with compatible pinouts and semaphore functionality. Verify electrical parameters such as access time and power consumption match system requirements. Check package dimensions and lead configurations for mechanical compatibility.