71321LA25PFGI

Memory IC Overview

The 71321LA25PFGI is a high-speed 16Kb (2K x 8) dual-port static random-access memory manufactured by Renesas Electronics Corporation. It features asynchronous parallel interface with a maximum access time of 25 ns. The device operates on a single 5V ±10% power supply, supporting a voltage range of 4.5V to 5.5V. It is housed in a 64-pin TQFP package and supports an industrial temperature range from -40°C to +85°C.

Memory IC Feature Summary

• True dual-ported memory cells allow simultaneous independent access to the same memory location from both ports without conflict.
• Integrated internal interrupt logic provides two INT flags for efficient port-to-port communication and interprocessor signaling.
• On-chip port arbitration logic manages bus access, featuring a BUSY output flag to indicate port availability.
• Automatic power-down feature controlled by chip enable signals allows entry into low standby power mode.

Memory IC Applications

• Stand-alone 8-bit dual-port RAM systems
• Master dual-port RAM configurations in 16-bit or wider data bus systems when paired with Slave devices
• Interprocessor communication interfaces requiring fast asynchronous data exchange

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 regulations. Check for moisture sensitivity level handling requirements during storage and assembly. Ensure replacement parts match pinout and electrical specifications if sourcing alternatives due to end-of-life status.

Memory IC Selection Notes

Select this component for applications requiring true simultaneous access to shared memory locations. It is suitable for systems needing integrated interrupt signaling without external logic. Consider the 25 ns access speed and 5V operation for compatibility with existing TTL-compatible logic families. Evaluate thermal performance within the specified industrial temperature range.

Memory IC Part Context

This part belongs to the 71321 series of dual-port SRAMs, designed for high-speed data buffering and communication between processors. It serves as a master device that can expand data bus width when used with slave counterparts like the 71421. The LA suffix indicates industrial temperature rating and specific voltage characteristics compared to other variants.

Memory IC Replacement Considerations

Public confirmed substitute: 71321SA55PFI. Verify functional equivalence regarding access time and interrupt logic before substitution.