71321SA25JI

Memory IC Overview

The 71321SA25JI is a high-speed 16Kbit (2K x 8) dual-port static random-access memory manufactured by Renesas Electronics. It features asynchronous parallel interface with a 25 ns access time and operates on a single 4.5V to 5.5V supply. The device utilizes true dual-ported memory cells allowing simultaneous independent access to the same location from either port. It includes internal interrupt logic for interprocessor communication, BUSY output flags, and automatic power-down modes controlled by chip enable inputs.

Memory IC Feature Summary

• True dual-ported architecture enabling simultaneous independent access to shared memory locations without conflict
• Integrated interrupt logic providing two INT flags for efficient processor-to-processor communication
• On-chip arbitration logic with BUSY output flags to manage concurrent port operations
• Automatic low-power standby mode activated via chip enable control signals

Memory IC Applications

• Interprocessor communication in multiprocessor systems
• Master/Slave dual-port RAM expansion configurations
• Battery-backed data storage applications requiring fast access
• Industrial control systems operating within specified temperature ranges

Memory IC Procurement Notes

Verify component authenticity through authorized channels as this part is discontinued. Confirm RoHS compliance status and moisture sensitivity level prior to procurement. Check for valid replacement options due to end-of-life status. Ensure handling procedures account for humidity sensitivity requirements during storage and assembly processes.

Memory IC Selection Notes

Select this component when true dual-port functionality with integrated interrupt signaling is required. Suitable for systems needing simultaneous read/write access from two independent processors. Consider voltage compatibility with 5V TTL interfaces. Evaluate thermal performance against industrial temperature range specifications if operating in extreme environments.

Memory IC Part Context

Part of the 71321 series high-speed dual-port SRAM family designed for standalone or master/slave configurations. Manufactured by Renesas Electronics Corporation using CMOS technology. Available in 52-pin PLCC package with surface mount installation style. Designed for applications requiring error-free full-speed operation without additional discrete logic components.

Memory IC Replacement Considerations

Public confirmed substitute part numbers: IDT71321SA25J. Verify pinout compatibility and electrical parameters before substitution. Check manufacturer documentation for any functional differences between original and alternative sources.