7005L55JI8

Overview

The Renesas Electronics Corporation 7005L55JI8 is a high-speed, asynchronous dual-port static random-access memory (SRAM) integrated circuit. It features a storage capacity of 64 kilobits organized as 8K words by 8 bits. The device supports parallel interface operations with a maximum access time of 55 nanoseconds. It operates on a single 5V power supply within a voltage range of 4.5V to 5.5V. The component is housed in a 68-pin Plastic Leadless Chip Carrier (PLCC) package designed for surface-mount installation.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent read and write operations from either port without conflict.
• Integrated hardware semaphore signaling logic facilitates automatic data synchronization and arbitration between the two ports.
• Asynchronous operation allows flexible timing control for both ports, supporting master/slave configurations for expanded bus widths.

Applications

• High-speed data buffering in telecommunications equipment requiring low-latency packet handling.
• Real-time signal processing systems utilizing simultaneous data acquisition and output streams.
• Industrial automation controllers managing concurrent sensor inputs and actuator outputs.
• Network switching devices implementing internal traffic management and queueing mechanisms.

Procurement Notes

Verify the exact suffix designation against official manufacturer documentation, as variations such as J8 or G8 indicate specific package types or temperature ranges. Confirm RoHS compliance status, as older variants may not meet current environmental standards. Check for end-of-life notices or discontinuation announcements prior to procurement planning. Ensure compatibility with existing PCB footprints for the 68-pin PLCC configuration during replacement scenarios.

Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration logic. The 55ns speed grade offers a balance between performance and power consumption for general-purpose applications. Consider the 68-pin PLCC package for prototyping or legacy board designs requiring surface-mount compatibility. Evaluate system power budgets against the specified 5V supply requirements and standby current characteristics.

Part Context

This part belongs to the Renesas 7005 series of dual-port SRAMs, originally developed by Integrated Device Technology (IDT). The series provides versatile memory solutions for applications needing independent port access. The 7005L55 variant specifically denotes the 55-nanosecond access speed within the commercial temperature range family. Renesas continues to support this lineage through acquired technology portfolios.

Replacement Considerations

Direct substitutes include other 64Kb dual-port SRAMs with 55ns access times in 68-pin PLCC packages. Verify pinout compatibility and electrical specifications before substitution. Alternative speed grades like 25ns or 35ns may fit if timing margins allow. Ensure the replacement supports the same 5V logic levels and semaphore functionality for seamless integration.