71421SA5J

Overview

The Renesas Electronics Corporation 71421SA5J is a dual-port, asynchronous static random-access memory (SRAM) integrated circuit. It provides a storage capacity of 16 kilobits organized as 2K words by 8 bits. The device features parallel interface access with a maximum access time of 55 nanoseconds. It operates within a supply voltage range of 4.5V to 5.5V and is housed in a 52-pin Plastic Leadless Chip Carrier (PLCC) package measuring 19.13x19.13 mm. The component supports surface mount installation and functions within an ambient temperature range of 0°C to 70°C.

Feature Summary

• Dual-port architecture enabling independent simultaneous read/write operations for both ports
• Asynchronous parallel interface supporting standard logic levels
• Volatile memory technology retaining data only during active power supply

Applications

• High-speed data buffering in embedded systems
• Cache memory implementation in microcontroller-based designs
• Data storage in industrial control equipment

Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm RoHS compliance requirements as the part may not meet current environmental standards. Validate package integrity upon receipt to ensure pin alignment matches the 52-PLCC specification. Review datasheet revisions for any design changes affecting electrical characteristics or pinout definitions before final integration.

Selection Notes

Select this component when dual-port functionality is required for concurrent processor and peripheral access. Ensure system voltage aligns with the 4.5V to 5.5V operating range. Consider the 55ns access speed against application timing constraints. Evaluate the PLCC package suitability for the target PCB layout and assembly process compared to alternative packages like TQFP.

Part Context

This SRAM belongs to the Renesas 71421SA series, which includes variants with different access speeds and packaging options. The series is designed for applications requiring reliable, high-speed volatile memory. Related parts include the 71421LA series and other members of the 71421 family offering varying performance metrics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs if considering alternative manufacturers.