71321SA17PFI

Memory IC Overview

The Renesas Electronics Corporation 71321SA17PFI is a high-speed, 16Kb (2K x 8) Dual-Port Static RAM featuring internal interrupt logic for interprocessor communications. It operates asynchronously with a maximum access time of 17 ns and supports a single 5V ±10% power supply. The device utilizes true dual-ported memory cells allowing simultaneous access to the same location. It includes on-chip port arbitration logic, BUSY output flags, and two INT flags for communication. The component is housed in a 64-pin TQFP package measuring 14x14 mm and supports battery backup operation.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations by two processors.
• Integrated internal interrupt logic providing two dedicated flags for efficient port-to-port communication without external discrete logic.
• On-chip port arbitration logic with BUSY output flags to manage data bus contention during simultaneous accesses.
• Asynchronous operation from either port with automatic power-down features controlled by chip enable signals.

Memory IC Applications

• Stand-alone 8-bit dual-port RAM systems
• Master dual-port RAM configurations in 16-bit or wider word width systems when paired with slave devices
• Interprocessor communication interfaces requiring low-latency data exchange

Memory IC Procurement Notes

Verify component authenticity through authorized distributors as this part may be discontinued. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Check for available upgrades within the 71321LA series if lead-free requirements are mandatory. Ensure packaging specifications match production line capabilities.

Memory IC Selection Notes

Select this component for applications requiring high-speed asynchronous dual-port memory with integrated communication flags. Suitable for systems needing 5V TTL-compatible interfaces and on-chip arbitration. Consider temperature range and package dimensions against board layout constraints. Evaluate upgrade paths if environmental regulations require lead-free alternatives.

Memory IC Part Context

The 71321SA series belongs to Renesas' high-speed dual-port SRAM family designed for real-time processing applications. These devices facilitate error-free full-speed operation in multi-processor environments by eliminating the need for external arbitration logic. The SA variant specifically denotes 5V operation with industrial temperature availability.

Memory IC Replacement Considerations

Public confirmed substitute: 71321LA17PFGI. This upgrade offers lead-free compliance while maintaining functional compatibility.