7140LA35JI

Memory IC Overview

The Renesas Electronics Corporation 7140LA35JI 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 and write cycle time of 35 nanoseconds. It operates within a supply voltage range of 4.5 volts to 5.5 volts and supports surface-mount installation in a 48-pin Plastic Leaded Chip Carrier (PLCC) package. The component is designed for industrial temperature ranges, typically operating between 0°C and 70°C.

Memory IC Feature Summary

• Supports simultaneous independent read and write operations at two distinct ports without bus conflicts
• Utilizes high-speed CMOS technology to ensure low power consumption during operation
• Features asynchronous control logic that simplifies system timing requirements
• Provides reliable data retention for volatile memory applications requiring fast access speeds

Memory IC Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded microprocessor systems
• Data acquisition systems requiring rapid temporary storage
• Industrial automation controllers needing reliable volatile memory

Memory IC Procurement Notes

Verify the specific suffix JI against official Renesas documentation to confirm package dimensions and pinout compatibility. Confirm RoHS compliance status as older variants may not meet current environmental standards. Check for end-of-life notifications or discontinuance notices from the manufacturer before finalizing procurement plans.

Memory IC Selection Notes

Select this component when a system requires true dual-port functionality for concurrent data access. Ensure the design accommodates the 48-PLCC package footprint and thermal requirements. Verify that the 35ns speed meets the timing constraints of the target application. Consider the 5V supply requirement and compare against lower voltage alternatives if power efficiency is critical.

Memory IC Part Context

The 7140LA series belongs to Renesas' family of high-speed dual-port SRAMs. These devices are engineered for applications demanding high bandwidth and independent port access. The 7140LA35 variant specifically targets systems requiring 35ns performance levels. This part represents a legacy solution often found in established industrial and communication hardware designs.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official Renesas documentation for potential direct replacements or upgrade paths.