71321SA35PF8

Memory IC Overview

The Renesas Electronics Corporation 71321SA35PF8 is a high-speed, 16-kbit (2K x 8) Dual-Port Static Random Access Memory (SRAM). It features asynchronous parallel interface operation with a maximum access time of 35 nanoseconds. The device operates on a single 5V ±10% power supply, with voltage specifications ranging from 4.5V to 5.5V. It is housed in a 64-pin Thin Quad Flat Package (TQFP) and supports surface mount installation. The component includes internal interrupt logic for interprocessor communications and automatic power-down capabilities controlled by chip enable signals.

Memory IC Feature Summary

• True dual-ported memory cells enabling simultaneous independent access to the same memory location from both ports without conflict.
• Integrated internal interrupt logic providing two flags for efficient port-to-port communication and interprocessor signaling.
• On-chip port arbitration logic with BUSY output flag to manage data bus contention during simultaneous accesses.
• Automatic power-down feature that reduces standby power consumption when the chip enable signal is deactivated.

Memory IC Applications

• Interprocessor communication interfaces in multi-core or distributed processing systems
• Master/Slave dual-port RAM configurations expanding data bus width to 16 bits or more
• Battery-backed memory systems requiring low-power standby modes
• High-speed data buffering in asynchronous digital circuits

Memory IC Procurement Notes

Verify component authenticity through authorized distributors as this part may be subject to obsolescence notices. Confirm package integrity and moisture sensitivity level handling requirements prior to assembly. Check for recent Product Change Notices regarding manufacturing site changes or labeling updates. Ensure compatibility with existing system voltage levels and thermal constraints before finalizing procurement plans.

Memory IC Selection Notes

Select this component for applications requiring true dual-port functionality with integrated arbitration logic. Consider the 64-pin TQFP package for surface-mount designs needing compact footprint. Evaluate the 35ns access speed against system timing requirements. Verify that the 5V operating voltage aligns with the target platform's power supply infrastructure and that the industrial temperature range meets environmental specifications.

Memory IC Part Context

The 71321 series belongs to Renesas' high-speed dual-port SRAM family, designed for standalone 8-bit operation or as a master device paired with slave counterparts like the 71421. This specific model integrates interrupt logic to facilitate direct processor-to-processor communication without external discrete logic, simplifying system design and reducing component count in complex embedded architectures.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for potential end-of-life alternatives or pin-compatible upgrades if this component becomes unavailable.