71321LA35TFI

Memory IC Overview

The 71321LA35TFI is a high-speed 2K x 8 dual-port static RAM featuring internal interrupt logic for interprocessor communications. It operates with a single 5V ±10% power supply and provides 35 ns access time. The device supports automatic power-down modes controlled by chip enable signals. It is designed to function as a standalone 8-bit dual-port RAM or as a master unit paired with the 71421 slave RAM for expanded word widths. The component utilizes true dual-ported memory cells allowing simultaneous access to the same location.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to identical memory locations from both ports without conflict.
• Integrated interrupt logic providing two INT flags for direct interprocessor communication and status signaling between connected systems.
• On-chip port arbitration logic manages bus conflicts, ensuring error-free operation when expanding data bus width using external slave devices.

Memory IC Applications

• Interprocessor communication interfaces requiring low-latency data exchange between multiple processors.
• Master dual-port RAM configurations in 16-bit or wider data bus systems when paired with compatible slave units.
• Battery-backed memory applications utilizing the LA series specific 2V data retention capability.

Memory IC Procurement Notes

Verify component authenticity through authorized Renesas distributors due to obsolete status. Confirm lead-free compliance and moisture sensitivity level requirements against current manufacturing standards. Check for available upgrade alternatives if long-term supply stability is required for production environments.

Memory IC Selection Notes

Select this part for applications requiring asynchronous dual-port SRAM with integrated communication flags. Ensure system voltage matches the 5V specification. Consider the 64-TQFP package dimensions for PCB layout constraints. Verify temperature range suitability for the intended operational environment.

Memory IC Part Context

This component belongs to the 71321 family of dual-port SRAMs manufactured by Renesas Electronics. It shares architectural similarities with the 71321SA variant but differs in voltage retention characteristics. The LA suffix indicates specific battery backup capabilities not present in standard SA versions.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include 71321LA20PFG and 71321LA20TFG8. These alternatives offer faster access times while maintaining the same memory organization and package type.