71321LA20JG

Memory IC Overview

The Renesas 71321LA20JG is a high-speed 16Kb (2K x 8) dual-port static RAM featuring internal interrupt logic for interprocessor communications. It operates asynchronously with a 20 ns access time and supports a single 5V ±10% power supply ranging from 4.5V to 5.5V. The device utilizes true dual-ported memory cells allowing simultaneous access to the same location. It is housed in a 52-pin PLCC package and functions as a master port, expandable to 16-bit or wider systems using slave counterparts.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to identical memory locations by both ports.
• Integrated interrupt logic providing two INT flags for efficient port-to-port communication without discrete logic.
• On-chip port arbitration logic with BUSY output flag to manage concurrent access conflicts automatically.
• Automatic power-down feature controlled by chip enable signals to achieve very low standby power consumption.

Memory IC Applications

• Interprocessor communication links in multi-core embedded systems
• Master port configuration in 16-bit or wider data bus expansion systems
• Battery-backed volatile memory applications requiring 2V data retention

Memory IC Procurement Notes

Verify component authenticity through authorized distributors due to discontinuation status. Confirm RoHS3 compliance and moisture sensitivity level 3 handling requirements during storage and assembly. Validate package integrity for the 52-PLCC form factor against mechanical specifications before integration into final assemblies.

Memory IC Selection Notes

Select this component when asynchronous dual-port operation with integrated signaling is required. Ensure system voltage aligns with the 4.5V to 5.5V range. Consider the 20 ns access speed for timing constraints. Verify compatibility with slave devices like the 71421 if expanding bus width beyond 8 bits is necessary for the specific application design.

Memory IC Part Context

This part belongs to the 71321 series of high-speed dual-port SRAMs manufactured by Renesas Electronics. It shares architectural similarities with the IDT71321 but carries Renesas branding following corporate acquisitions. The series emphasizes standalone 8-bit operation or master-slave configurations for wider data paths, targeting industrial and commercial temperature ranges depending on the specific suffix variant.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with original IDT71321LA20JG specifications if sourcing legacy inventory. Verify pinout and electrical characteristics match exactly before considering any alternative dual-port SRAM components.