71V321SA55PF

Overview

The Renesas Electronics Corporation 71V321SA55PF is a dual-port asynchronous static random-access memory (SRAM) integrated circuit. It provides a storage capacity of 16 kilobits, organized as 2K words by 8 bits. The device features parallel interface access with a maximum access time and write cycle time of 55 nanoseconds. It operates within a supply voltage range of 4.5 volts to 5.5 volts. The component is housed in a 64-pin Thin Quad Flat Package (TQFP) measuring 14x14 millimeters. It supports surface-mount installation and functions across an ambient temperature range of -40°C to +85°C.

Feature Summary

• Dual-port architecture enabling independent simultaneous read/write operations on separate ports
• Asynchronous operation without requiring external clock signals for data transfer
• Parallel interface supporting standard bus connections for high-speed data exchange

Applications

• Data buffering in telecommunications equipment
• Cache memory implementation in industrial control systems
• Storage buffers in embedded network devices

Procurement Notes

Verify the specific suffix requirements for package type and temperature grade when sourcing replacements. Confirm RoHS compliance status as older revisions may not meet current environmental standards. Check manufacturer documentation for pinout compatibility with existing designs. Ensure supply chain sources provide genuine components to avoid counterfeit risks associated with obsolete parts.

Selection Notes

Select this component for applications requiring independent dual-port access at moderate speeds. Consider the 55 ns access time against system timing requirements. Evaluate the 4.5V to 5.5V operating range against available power rails. Assess the TQFP-64 package dimensions for PCB layout constraints compared to alternative packages like PLCC or DIP.

Part Context

This part belongs to the Renesas 71V321S series of dual-port SRAMs. It shares architectural similarities with other members of the family but differs in speed grade and voltage specifications. The 'SA' designation typically indicates specific speed and voltage characteristics within the product line. It serves as a legacy solution for designs originally targeting 5V logic families.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.