7140LA55J

Overview

The Renesas Electronics Corporation 7140LA55J 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 commercial operating temperatures between 0°C and +70°C.

Feature Summary

• Dual-port architecture enabling independent simultaneous read/write operations on separate ports
• Asynchronous operation without requiring external clock synchronization signals
• CMOS technology construction ensuring low power consumption during standby and active states

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded processing systems
• Data storage in industrial control logic circuits

Procurement Notes

This component has been officially discontinued by the manufacturer. Verify current availability through authorized distributors or secondary markets. Confirm RoHS compliance status, as older batches may not meet current environmental regulations. Validate part authenticity due to potential obsolescence risks and verify pin compatibility if integrating into existing designs.

Selection Notes

Select this component when dual-port functionality is required for concurrent master-slave data handling. Ensure the design accommodates the 52-PLCC footprint and 55ns timing constraints. Consider the limited temperature range for commercial applications only. Evaluate alternative modern SRAMs if long-term supply stability is critical for production continuity.

Part Context

The 7140LA55J belongs to the Renesas 7140LA series of high-speed CMOS dual-port SRAMs. This family typically includes variants with different access speeds and packaging options. The 'LA' suffix generally denotes specific speed grades and lead-free or standard PLCC configurations within the broader product line history.

Replacement Considerations

Direct substitutes are not explicitly listed in available public documentation. Review the IDT7140SA/LA datasheet for functional equivalents. Check for newer Renesas dual-port SRAMs with compatible pinouts and electrical specifications.