71321LA25TF

Memory IC Overview

The 71321LA25TF is a high-speed, 16-kbit (2K x 8) dual-port static random-access memory manufactured by Renesas Electronics. It operates asynchronously with a maximum access time of 25 ns and supports a parallel interface. The device functions on a single 4.5V to 5.5V power supply and includes internal interrupt logic for interprocessor communication. It features true dual-ported memory cells allowing simultaneous access to the same location, along with automatic power-down capabilities controlled by chip enable signals.

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 efficient port-to-port communication and synchronization between processors.
• Automatic power-down mode that reduces standby power consumption when chip enable signals are inactive.
• On-chip arbitration logic manages bus conflicts, ensuring error-free operation in standalone or master-slave configurations.

Memory IC Applications

• Interprocessor communication links in multi-core or distributed processing systems
• Buffer memory for data transfer between asynchronous digital subsystems
• Master dual-port RAM expansion in 16-bit or wider word width systems using slave devices
• Battery-backed volatile storage requiring low standby power during idle periods

Memory IC Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential obsolescence risks. Confirm RoHS compliance status as older variants may not meet current environmental regulations. Validate package integrity and moisture sensitivity level handling procedures before assembly. Cross-reference datasheet revisions to ensure compatibility with existing design specifications and pin assignments.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration logic. Suitable for applications needing fast asynchronous memory sharing between microprocessors. Consider thermal performance and power dissipation limits under continuous operation. Ensure voltage levels match system requirements within the specified 4.5V to 5.5V range for reliable functionality.

Memory IC Part Context

Part of the 71321SA/LA series of dual-port SRAMs designed for high-speed embedded memory applications. Offers scalable architecture supporting expansion via slave devices like the 71421. Commonly used in industrial, automotive, and telecommunications equipment requiring robust data buffering and processor coordination capabilities.

Memory IC Replacement Considerations

Check for updated versions such as 71321LA25TFGI8 which may offer improved packaging or compliance features. Verify pin compatibility and electrical characteristics before substitution. Consult official replacement guides for end-of-life products to identify qualified alternatives with equivalent performance metrics.