71421SA55J

Overview

The Renesas Electronics Corporation 71421SA55J is a dual-port static random-access memory (SRAM) integrated circuit. It features a storage capacity of 16 kilobits organized as 2K by 8 bits. The device utilizes a parallel interface with an access time and write cycle time of 55 nanoseconds. It operates within a supply voltage range of 4.5 volts to 5.5 volts and supports surface-mount installation in a 52-pin Plastic Leadless Chip Carrier (PLCC) package measuring 19.13x19.13 millimeters. The component is designed for commercial temperature ranges from 0°C to 70°C.

Feature Summary

• Dual-port architecture enabling independent simultaneous access by two processors
• Asynchronous operation without requiring external clock signals
• CMOS technology providing low power consumption characteristics

Applications

• High-speed data buffering in communication systems
• Cache memory implementation in embedded controllers
• Real-time data logging in industrial automation equipment

Procurement Notes

Verify the specific suffix designation, as J8 indicates tape and reel packaging while other suffixes may denote tube packaging. Confirm RoHS compliance status, as this series often lacks lead-free certification. Check end-of-life notices for discontinuation timelines. Ensure compatibility with existing PCB footprints for the 52-PLCC package. Validate moisture sensitivity level requirements for assembly processes.

Selection Notes

Select this component when independent read/write access is required for two masters. Compare access speeds against alternative SRAM families if higher throughput is needed. Evaluate package constraints against available board space for the PLCC form factor. Consider power dissipation limits relative to system thermal design. Verify voltage tolerance matches the target logic levels.

Part Context

This part belongs to the 71421SA family of dual-port SRAMs manufactured by Renesas Electronics. The family includes variants with different access times and packaging options. These devices are commonly used in legacy industrial and telecommunications designs requiring reliable non-volatile-like performance without retention batteries.

Replacement Considerations

IDT71421SA55J is a documented equivalent part number for this component.