71321LA20J8

Memory IC Overview

The Renesas Electronics Corporation 71321LA20J8 is a high-speed, asynchronous dual-port static random-access memory (SRAM) with an organization of 2K x 8 bits and a total capacity of 16 kbit. It features a parallel interface with a maximum access time of 20 ns. The device operates on a single 5V ±10% power supply, with voltage ranges from 4.5 V to 5.5 V. It supports simultaneous independent access to the same memory location by both ports. The component is housed in a 52-pin PLCC package and is designed for industrial temperature applications.

Memory IC Feature Summary

• True dual-ported memory cells enabling simultaneous read/write access to identical locations without conflict
• Integrated interrupt logic providing two INT flags for efficient port-to-port communication
• On-chip port arbitration logic with BUSY output flag to manage concurrent access requests
• Automatic power-down mode controlled by chip enable signals for low standby power consumption

Memory IC Applications

• Interprocessor communications in multi-CPU systems
• Master dual-port RAM configuration in 16-bit or wider data bus systems
• Battery backup operation requiring 2V data retention
• TTL-compatible digital logic interfaces

Memory IC Procurement Notes

Verify RoHS compliance status as documentation indicates potential non-compliance with current environmental directives. Confirm lead times due to reported long delivery periods. Check for moisture sensitivity level requirements during storage and handling. Validate that the specific J8 suffix corresponds to the correct package variant for your PCB design.

Memory IC Selection Notes

Select this component when simultaneous dual-port access is required without external arbitration logic. Ensure the system operates within the specified 4.5V to 5.5V range. Consider the 52-pin PLCC package constraints for layout. Verify if the industrial temperature range (-40°C to +85°C) is necessary for the application environment.

Memory IC Part Context

This part belongs to the 71321SA/LA series of dual-port SRAMs manufactured by Renesas Electronics. It serves as a standalone 8-bit memory or a master unit paired with 71421 slave devices. The LA suffix typically denotes extended temperature ranges compared to SA variants. It replaces legacy IDT parts with equivalent functionality.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include IDT71321LA20J8.