7140SA35J8

Overview

The Renesas Electronics Corporation 7140SA35J8 is an asynchronous dual-port static random access memory (SRAM) IC. It provides a storage capacity of 8 kilobits, organized as 1K words by 8 bits. The device features parallel interface connectivity and supports a supply voltage range of 4.5V to 5.5V. It operates within a commercial temperature range of 0°C to 70°C. The component utilizes a 52-pin PLCC package with J-leads, measuring 19.13mm by 19.13mm. Key timing specifications include a 35 nanosecond access time and write cycle time.

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 for low power consumption relative to older bipolar alternatives

Applications

• High-speed data buffering in telecommunications equipment
• Real-time signal processing systems requiring concurrent data access
• Industrial control units needing fast volatile memory storage

Procurement Notes

This component is officially discontinued by the manufacturer. Verify availability through authorized distributors for last-time buy opportunities or existing stock. Confirm RoHS compliance status, as indicated documentation suggests non-compliance. Validate package integrity and moisture sensitivity level handling procedures before installation. Ensure design-in compatibility with legacy systems requiring this specific pinout and electrical profile.

Selection Notes

Select this part when a system requires dual-port memory functionality with parallel interfaces. It suits applications needing 8Kb capacity with 35ns speed performance. Consider the 52-PLCC package constraints for PCB layout. Evaluate alternative components if RoHS compliance is mandatory for the target market. Assess thermal requirements against the specified commercial operating temperature range.

Part Context

The 7140SA35J8 belongs to the IDT/Renesas 7140SA series of dual-port SRAMs. This family typically offers varying capacities and speeds while maintaining compatible pinouts and operational characteristics. The device represents a legacy solution for high-performance memory applications prior to widespread adoption of newer serial or synchronous alternatives.

Replacement Considerations

Verify functional equivalence with other 8Kb dual-port SRAMs featuring 35ns access times. Check pin compatibility with the 52-PLCC package for direct replacement. Review datasheets for matching voltage ranges and timing parameters.