7140SA25JI

Overview

The Renesas Electronics Corporation 7140SA25JI is an asynchronous dual-port static random-access memory (SRAM) IC with a storage capacity of 8K bits, organized as 1K x 8. It features a parallel interface and supports a supply voltage range of 4.5V to 5.5V. The component offers a maximum access time of 25 ns and operates within a temperature range of -40°C to 85°C. It is housed in a 52-PLCC surface-mount package measuring 19.13x19.13 mm.

Feature Summary

• Dual-port architecture enabling independent simultaneous access by two processors
• Asynchronous operation for flexible system integration without clock synchronization
• CMOS technology providing low power consumption relative to older SRAM generations

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded processing systems
• Real-time data acquisition systems requiring concurrent read/write operations

Procurement Notes

Verify the specific suffix JI against official Renesas documentation to confirm the extended industrial temperature range (-40°C to 85°C), as standard variants may differ. Confirm RoHS compliance status, as earlier production runs or specific regional variants may not meet current environmental directives. Check for end-of-life notifications or obsolescence notices from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when dual-port functionality is required for concurrent processor access to shared memory resources. Ensure the design accommodates the 52-PLCC surface-mount footprint and the 4.5V to 5.5V VCC operating range. Verify that the 25 ns access time meets the system's timing requirements and that the industrial temperature rating aligns with the operational environment constraints.

Part Context

The 7140SA series represents a family of high-performance CMOS dual-port SRAMs designed for applications demanding fast, independent access from multiple masters. The 7140SA25 variant specifically targets systems requiring 25 ns performance levels. This component belongs to the broader IDT/Renesas SRAM portfolio, widely used in networking and industrial control applications where data integrity and speed are critical.

Replacement Considerations

Official substitutes include the 7140SA25J8 and 7140SA25G, which share similar electrical characteristics but differ in packaging (PLCC vs PGA) or pinout configurations. Cross-referencing with the official datasheet is essential to verify pin compatibility and mechanical fit before substitution.