7140SA55JI

Overview

The Renesas Electronics Corporation 7140SA55JI 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 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

• Supports simultaneous independent read and write operations at both Port A and Port B without bus contention.
• Utilizes CMOS technology to provide high-speed asynchronous data transfer capabilities.
• Features dedicated chip select inputs for each port to enable selective access to the memory array.

Applications

• High-performance digital signal processing systems requiring concurrent data handling
• Network communication equipment utilizing packet buffering and switching
• Industrial control systems demanding reliable volatile data storage

Procurement Notes

Verify the specific suffix designation carefully, as package type and temperature range vary across the product family. Confirm RoHS compliance status, as many variants are non-compliant. Check official discontinuation notices from Renesas, as this component series has been subject to end-of-life notifications. Ensure the supplier provides valid traceability documentation for legacy semiconductor components.

Selection Notes

Select this part when dual-port functionality is required for separate master devices accessing the same memory space. Compare against single-port SRAMs if concurrent access is unnecessary. Verify that the 55 ns speed meets system timing requirements. Ensure the 52-PLCC footprint matches the printed circuit board design constraints.

Part Context

This component belongs to the IDT 7140LA/SA series of dual-port SRAMs manufactured by Renesas Electronics. The series offers various capacities and package options to support different embedded memory applications. The 7140 variant specifically denotes the 8Kb density level within this architectural family.

FAQ

How does the dual-port architecture handle simultaneous access?

Port A and Port B operate independently, allowing one port to read or write while the other performs a different operation without bus conflicts.

What is the power supply requirement for this IC?

The device requires a single 5V power supply, specifically operating within a voltage range of 4.5V to 5.5V.