71342SA45J

Overview

The Renesas Electronics Corporation 71342SA45J is a high-speed, 32Kb (4K x 8) dual-port static random-access memory (SRAM). It operates asynchronously with a maximum access time of 45 nanoseconds. The device supports parallel interface communication and functions within a supply voltage range of 4.5V to 5.5V. It is housed in a 52-pin Plastic Leadless Chip Carrier (PLCC) package designed for surface-mount installation.

Feature Summary

• Provides fully independent dual ports allowing simultaneous access to the same memory location without conflict.
• Integrates on-chip hardware semaphore logic to facilitate arbitration between the two ports.
• Supports automatic power-down modes controlled by chip enable and semaphore signals for low standby power.

Applications

• High-speed data buffering in telecommunications systems
• Cache memory implementation in embedded controllers
• Data storage in industrial automation equipment

Procurement Notes

Verify component authenticity through authorized channels due to discontinuation status. Confirm package integrity as moisture sensitivity levels may affect solderability. Review end-of-life notifications for availability constraints. Ensure compatibility with existing board layouts regarding the 52-PLCC footprint. Validate electrical specifications against current system requirements before integration.

Selection Notes

Select this component when asynchronous dual-port functionality with hardware semaphore support is required. The 45ns speed suits moderate-to-high frequency applications. Verify that the 52-PLCC package aligns with manufacturing capabilities. Consider the 4.5V to 5.5V operating range for power supply design. Evaluate alternative packages if surface-mount density differs from PLCC constraints.

Part Context

This part belongs to the 71342SA series of dual-port SRAMs. It shares architectural similarities with other variants differing primarily in access speed and package type. The series emphasizes independent port operation and semaphore-based arbitration. It serves as a legacy solution for systems requiring concurrent memory access without external arbitration logic.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with IDT-branded equivalents such as IDT71342SA45J if pin-compatible alternatives are required. Verify functional equivalence regarding semaphore logic and access times before substitution.