71321SA55JI

Memory IC Overview

The Renesas Electronics Corporation 71321SA55JI is a CMOS dual-port static random access memory (SRAM) with a storage capacity of 16 kbit, organized as 2k x 8. It features a parallel interface and an asynchronous architecture. The device supports a supply voltage range from 4.5 V to 5.5 V, with a maximum power consumption of 155 mA. Access time is specified at 55 ns. It operates within a commercial temperature range of 0°C to +70°C and is housed in a 52-pin PLCC surface-mount package.

Memory IC Feature Summary

• Dual-port architecture enabling independent simultaneous read/write operations on separate ports
• Asynchronous operation requiring no external clock signals for data transfer
• CMOS technology providing compatibility with standard logic families

Memory IC Applications

• High-performance processor secondary cache systems
• Network router buffer memory management
• Telecommunications equipment data buffering

Memory IC Procurement Notes

Verify the exact suffix designation, as official documentation lists variants such as 71321SA55JI8 or 71321SA55JG8. Confirm RoHS compliance status, as some versions are marked non-compliant while others meet specific environmental standards. Check current lifecycle status, as this component family may be subject to discontinuation notices. Ensure the selected package matches the required PCB footprint specifications.

Memory IC Selection Notes

Select this component when a design requires independent dual-port access for concurrent data handling without bus contention. Verify that the 55 ns access speed meets the system timing requirements. Ensure the operating environment remains within the 0°C to +70°C commercial temperature range. Confirm that the 5V logic levels align with the rest of the circuit interface. Consider alternative packages if surface-mount PLCC-52 is not suitable for the assembly process.

Memory IC Part Context

This part belongs to the Renesas 7132 series of high-speed CMOS SRAMs. These devices are designed for applications requiring fast, reliable data storage with dual-port capabilities. The series typically includes various access speeds and organization options to support diverse embedded systems and networking hardware requirements.

Memory IC Replacement Considerations

Official substitutes include the IDT71321SA55JI8 and IDT71321SA55JG8. Verify pinout compatibility and electrical parameters before substitution.