71342SA70JI

Overview

The Renesas Electronics Corporation 71342SA70JI is a high-speed, asynchronous dual-port static random-access memory (SRAM) device. It features a storage capacity of 32 kilobits organized as 4K words by 8 bits. The component supports simultaneous independent access to the same memory location from either port, facilitated by on-chip hardware semaphore logic for arbitration. It operates with a standard TTL-compatible single 5V power supply and offers an access time of 70 nanoseconds. The device is housed in a 52-pin Plastic Leadless Chip Carrier (PLCC) package.

Feature Summary

• True dual-ported memory architecture enabling concurrent read/write operations from two independent ports without wait states.
• Integrated hardware semaphore signaling block allowing automatic arbitration between ports when accessing shared memory locations.
• Fully asynchronous operation compatible with standard TTL logic levels for simplified system integration.

Applications

• High-performance data buffering in telecommunications equipment
• Real-time signal processing systems requiring low-latency memory access
• Industrial control systems needing reliable dual-port data exchange

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability issues. Confirm RoHS compliance status and specific packaging requirements prior to ordering. Check for end-of-life notifications or obsolescence notices that may affect long-term supply chain stability. Ensure proper handling procedures are followed during procurement and storage.

Selection Notes

Select this component when simultaneous bidirectional data transfer is required without external arbitration circuitry. Consider the 70ns access speed and PLCC package constraints against board space and thermal requirements. Evaluate if the integrated semaphore feature sufficiently meets contention management needs compared to simpler single-port alternatives.

Part Context

This part belongs to the Renesas 71342 series of dual-port SRAMs, designed for applications demanding high-speed, conflict-free memory sharing. The series typically includes variants with different access speeds and package options, such as TQFP or ceramic packages, catering to various industrial and commercial temperature ranges and form factor requirements.

Replacement Considerations

Direct substitutes include IDT7134SA70J and other 71342SA series variants with matching 70ns speed and 52-pin PLCC footprint. Verify pin compatibility and electrical specifications before substitution. Alternative packages like TQFP require adapter solutions or redesign.