71421LA25PFGI

Overview

The 71421LA25PFGI is a dual-port static random-access memory integrated circuit manufactured by Renesas Electronics Corporation. It provides a storage capacity of 16 kilobits organized as 2K words by 8 bits. The device features asynchronous parallel interface with a maximum access time of 25 nanoseconds. It operates within a supply voltage range of 4.5V to 5.5V and supports an industrial temperature range from -40°C to +85°C. The component is housed in a 64-pin Thin Quad Flat Package.

Feature Summary

• Supports independent simultaneous read and write operations at both Port A and Port B for high-throughput data handling.
• Utilizes CMOS technology to ensure low power consumption during active and standby modes.
• Includes dedicated control signals for managing write enable, output enable, and chip select functions.

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded processing systems
• Data logging applications requiring rapid dual-port access

Procurement Notes

Verify the specific suffix PFGI to confirm the 64-TQFP package and industrial temperature rating. Confirm RoHS compliance status as older batches may differ. Check for obsolescence notices or end-of-life declarations from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when dual-port architecture is required for concurrent host and peripheral access. Ensure the system voltage aligns with the 4.5V to 5.5V operating range. Consider the 25ns access speed against system timing requirements and verify pin compatibility with the target PCB footprint.

Part Context

This part belongs to the 71421LA series of dual-port SRAMs. It shares architectural similarities with other members like the 71321SA but offers improved speed and industrial temperature tolerance. The LA suffix typically denotes enhanced performance characteristics compared to standard SA variants within the same family.

Replacement Considerations

Direct substitutes include the 71421LA20PF8 for faster 20ns access or the 71421LA35J for slower 35ns operation in PLCC packages. Verify pinout compatibility and voltage levels when cross-referencing with IDT equivalents.