71321LA55TFG8

Memory IC Overview

The 71321LA55TFG8 is a high-speed, 16Kb (2K x 8) dual-port static random-access memory manufactured by Renesas Electronics Corporation. It features asynchronous parallel interface operation with a maximum access time of 55 ns. The device operates on a single 4.5V to 5.5V power supply and supports an industrial temperature range from -40°C to +85°C. It is housed in a 64-pin Thin Quad Flat Package (TQFP) with a 10x10 mm footprint.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location from both ports without conflict.
• Integrated internal interrupt logic providing two INT flags for efficient port-to-port communication and interprocessor signaling.
• On-chip port arbitration logic manages bus contention automatically, eliminating the need for external discrete logic components.

Memory IC Applications

• Interprocessor communication links between microprocessors or digital signal processors.
• Master dual-port RAM configuration in systems expanding data bus width using compatible slave devices.
• High-speed buffering applications requiring concurrent read/write operations from separate processing units.

Memory IC Procurement Notes

Verify component authenticity through authorized distributors as counterfeits exist. Confirm RoHS compliance status as older batches may not meet current environmental standards. Check for moisture sensitivity level handling requirements during storage and assembly. Ensure voltage supply stability within the specified 4.5V to 5.5V range to prevent data corruption.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration hardware. Suitable for designs needing integrated interrupt signaling for synchronization. Verify package compatibility with existing PCB footprints for 64-TQFP configurations. Consider thermal management capabilities for industrial temperature environments.

Memory IC Part Context

This part belongs to the 71321 series of dual-port SRAMs designed for standalone or master-slave configurations. It shares architectural similarities with the 71421 series but offers 8-bit word width. The LA suffix indicates low-power variants supporting battery backup modes, distinguishing it from standard SA series parts.

Memory IC Replacement Considerations

The 71321LA25TFG8 serves as a verified faster-speed replacement within the same package and pinout configuration. Both parts maintain identical functional specifications and interrupt logic while differing only in access time performance metrics.