71321SA45J8

Memory IC Overview

The Renesas Electronics Corporation 71321SA45J8 is a high-speed dual-port static random-access memory (SRAM) device. It features an internal interrupt logic designed for interprocessor communications. The memory organization is 2K x 8, providing a total capacity of 16K bits. The access time and write cycle time are specified at 45 ns. It operates within a supply voltage range of 4.5V to 5.5V and supports a parallel interface. The component is housed in a 52-pin PLCC package.

Memory IC Feature Summary

• Dual-port architecture enabling simultaneous independent access by two processors
• Integrated interrupt logic for efficient interprocessor communication signaling
• Asynchronous operation with fast 45 ns access times
• Parallel interface supporting standard memory control signals

Memory IC Applications

• Interprocessor communication buffers in multi-processor systems
• High-speed data buffering between microprocessors and peripherals
• Cache memory applications requiring low latency
• Real-time signal processing data storage

Memory IC Procurement Notes

Verify the exact suffix J8 confirms the 52-PLCC package and commercial temperature range. Confirm RoHS compliance status as older variants may not meet current standards. Check for discontinuation notices or last-time-buy dates from Renesas. Ensure the source document matches the specific part number to avoid confusion with similar 7132 series devices lacking interrupt logic.

Memory IC Selection Notes

Select this component when dual-port functionality with hardware interrupt generation is required. Compare against standard single-port SRAMs if only one processor accesses the memory. Consider the 52-PLCC footprint constraints during PCB layout. Evaluate power consumption specifications against system thermal limits given the 5V operation.

Memory IC Part Context

This device belongs to the Renesas 7132SA series of dual-port SRAMs. It shares architectural similarities with other members like the 7133SA but differs in organization and pin count. The series is characterized by asynchronous operation and interrupt capabilities. It serves as a legacy solution for embedded systems requiring dedicated hardware handshaking mechanisms.

Memory IC Replacement Considerations

Direct substitutes include IDT7132SA45J8. Verify pin compatibility and interrupt logic equivalence before substitution.