71342LA45JI

Overview

The 71342LA45JI is a high-speed dual-port static random-access memory (SRAM) manufactured by Renesas Electronics Corporation. It features a storage capacity of 32 kilobits organized as 4K words by 8 bits. The device supports fully asynchronous parallel operation with independent access from either port, including simultaneous access to the same memory location. It includes on-chip semaphore logic for hardware arbitration between ports and operates on a single 5V TTL-compatible power supply. The component is housed in a 68-pin PLCC package and supports an industrial operating temperature range.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access from both ports
• Integrated semaphore logic block for hardware-based arbitration and flag control between ports
• Fully asynchronous operation compatible with standard TTL logic levels
• Automatic low-power standby mode controlled by chip enable and semaphore signals

Applications

• Real-time data buffering in industrial equipment
• High-speed cache memory in embedded systems
• Data logging applications requiring concurrent read/write operations
• Network interface controllers managing packet buffers

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability of obsolete or refurbished units. Confirm RoHS compliance status, as specific suffixes may indicate lead-free variants. Validate package integrity and pin alignment against datasheet specifications before integration. Ensure proper handling procedures are followed to prevent electrostatic discharge damage during installation.

Selection Notes

Select this component when dual-port functionality with hardware semaphore support is required for concurrent data access. Consider the 4Kx8 organization and 45ns access time for matching system timing requirements. Evaluate the 68-PLCC package constraints against PCB layout limitations. Compare power consumption characteristics against alternative SRAM families if battery backup or low standby current is critical for the application design.

Part Context

This part belongs to the Renesas 71342 series of dual-port SRAMs, which are designed for high-performance applications requiring independent port access. The series typically offers various speed grades and package options to suit different system requirements. These components are widely used in telecommunications, networking, and industrial automation where reliable concurrent data handling is essential for system stability and performance.

Replacement Considerations

Check for official Renesas replacement parts within the 71342LA family that offer updated speed grades or compliant packaging. Verify pin-to-pin compatibility and electrical parameter equivalence before substitution. Consult manufacturer documentation for any obsolescence notices or recommended upgrades to ensure long-term supply chain stability.