71321LA45J8

Memory IC Overview

The Renesas Electronics Corporation 71321LA45J8 is a high-speed, 16 kbit dual-port static random-access memory (SRAM) device. It features a 2K x 8 organization with a 45 ns access time. The component operates on a single 5V ±10% power supply and supports asynchronous operation from either port. It includes internal interrupt logic for interprocessor communications and automatic power-down capabilities. The device is housed in a 52-pin PLCC package and is rated for an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• True dual-ported memory cells enabling simultaneous access to the same memory location
• Internal interrupt flags facilitating direct port-to-port communication
• On-chip port arbitration logic with BUSY output flag
• Automatic power-down mode controlled by chip enable signals

Memory IC Applications

• Interprocessor communication systems
• Master/Slave dual-port RAM configurations
• Industrial control applications requiring battery backup

Memory IC Procurement Notes

Verify end-of-life status before procurement as this component may be discontinued. Confirm RoHS compliance requirements against specific project standards. Ensure the 52-PLCC package footprint matches the target PCB design. Validate that the 5V TTL interface aligns with system voltage levels. Check for available replacement alternatives if long-term supply is required.

Memory IC Selection Notes

Select this component when simultaneous independent access to shared memory is required without external arbitration logic. Suitable for systems needing fast data exchange between processors. Verify that the 45 ns speed meets timing constraints. Consider the 52-PLCC package availability during selection. Ensure compatibility with existing 5V logic families.

Memory IC Part Context

This part belongs to the 71321 series of dual-port SRAMs manufactured by Renesas Electronics. The series provides high-speed memory solutions with integrated communication features. Variants differ in access times and package types. The LA suffix indicates industrial temperature range capability. These devices are designed for robust performance in demanding environments.

Memory IC Replacement Considerations

Check for official substitute part numbers within the 71321 family. Verify pinout compatibility with existing designs. Confirm functional equivalence regarding interrupt logic and arbitration. Review datasheet updates for any specification changes in newer revisions.