7140LA55JI

Overview

The Renesas Electronics Corporation 7140LA55JI is an asynchronous dual-port static random-access memory (SRAM) integrated circuit. It provides a storage capacity of 8 kilobits, organized as 1K words by 8 bits. The device features a parallel interface with a maximum access time of 55 nanoseconds. It operates within a supply voltage range of 4.5V to 5.5V and supports surface-mount installation in a 52-pin Plastic Leadless Chip Carrier (PLCC) package measuring 19.13x19.13 mm. The component is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Dual-port architecture enabling independent simultaneous read/write operations on separate ports.

Applications

• High-speed data buffering in communication systems
• Cache memory implementation in embedded processors
• Data storage in industrial control applications

Procurement Notes

Verify the exact suffix designation against official manufacturer documentation, as variations exist between J and JI designations regarding packaging or regional specifications. Confirm RoHS compliance status, as this specific part number may not meet current environmental directives. Check for active product discontinuation notices or end-of-life announcements from Renesas Electronics before finalizing procurement plans.

Selection Notes

Select this component when a small-capacity, high-speed volatile memory solution is required for parallel bus architectures. Ensure the system design accommodates the 52-PLCC surface-mount footprint and the specified 4.5V to 5.5V power supply requirements. Verify that the -40°C to +85°C industrial temperature rating aligns with the operational environment constraints.

Part Context

This component belongs to the IDT 7140SA/LA series of dual-port SRAMs manufactured by Renesas Electronics. These devices are designed for applications requiring fast, non-volatile-like performance without the complexity of flash memory controllers. The series typically offers flexible port configurations for efficient data transfer between different system buses.

Replacement Considerations

Consult official Renesas cross-reference documents for verified substitute part numbers. Generic industry equivalents may differ in pinout compatibility or electrical characteristics.