71342LA45J

Overview

The Renesas Electronics Corporation 71342LA45J is a high-speed, 32Kbit (4K x 8) dual-port static random-access memory (SRAM). It features fully asynchronous parallel operation with independent read/write ports. The device supports simultaneous access to the same memory location and includes on-chip semaphore logic for port arbitration. It operates on a single 5V power supply within a voltage range of 4.5V to 5.5V. The component has a maximum access time of 45ns and is housed in a 52-pin PLCC package.

Feature Summary

• True dual-ported architecture allowing simultaneous independent access from either port
• Integrated hardware semaphore signaling block for automatic arbitration between ports
• Fully asynchronous operation supporting flexible system integration
• Battery backup capability enabling data retention at low voltages

Applications

• High-performance real-time engine systems requiring concurrent data access
• Industrial equipment control units needing reliable dual-port memory
• Telecommunications infrastructure utilizing semaphore-based synchronization
• Automotive electronic modules requiring robust data handling

Procurement Notes

Verify component authenticity through authorized channels as this part may be discontinued or subject to obsolescence notices. Confirm specific suffix requirements against official datasheets to ensure correct speed grade and package variant. Check for RoHS compliance status and moisture sensitivity levels prior to procurement planning.

Selection Notes

Select this component when true dual-port functionality with hardware arbitration is required. Ensure the 52-pin PLCC package fits the target PCB layout constraints. Verify that the 45ns access speed meets the system timing requirements. Consider temperature range specifications if operating in extreme environments.

Part Context

This SRAM belongs to the 71342 series, designed for applications demanding high-speed concurrent memory access. It complements Renesas' portfolio of memory solutions by providing dedicated dual-port capabilities without external arbitration logic. The device is suitable for complex embedded systems where data integrity and simultaneous processing are critical.

Replacement Considerations

Check for direct pin-compatible substitutes within the 71342 family. Verify if faster speed grades or alternative packages like TQFP are available as upgrades. Consult official discontinuation notices for recommended replacement parts.