71421SA4J

Memory IC Overview

The Renesas Electronics Corporation 71421SA4J is a dual-port, asynchronous static random-access memory (SRAM) integrated circuit. It provides a total storage capacity of 16 kilobits, organized as 2K words by 8 bits. The device features a parallel interface with a maximum access 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. The component is designed for industrial temperature ranges from 0°C to 70°C.

Memory IC Feature Summary

• Dual-port architecture enabling independent simultaneous read/write operations on separate ports
• Asynchronous operation without requiring a system clock signal
• Parallel data interface for direct connection to microprocessors or controllers

Memory IC Applications

• Real-time data buffering in industrial control systems
• High-speed cache memory in embedded processing applications
• Data storage in telecommunications equipment

Memory IC Procurement Notes

Verify the specific suffix J against official Renesas documentation to confirm package type and lead finish. Confirm RoHS compliance status as legacy components may vary. Check end-of-life notices and last-time-buy dates before procurement planning. Ensure the supplier provides valid traceability documents for this discontinued part number.

Memory IC Selection Notes

Select this component when dual-port functionality is required for concurrent data handling. Verify that the 55ns access speed meets the system timing requirements. Ensure the design accommodates the 52-PLCC footprint and 4.5V to 5.5V power supply constraints. Consider availability constraints due to the component's mature lifecycle stage.

Memory IC Part Context

This SRAM belongs to the 71421SA series of high-performance dual-port memories manufactured by Renesas Electronics. The series is characterized by its asynchronous parallel interface and robust industrial specifications. It serves as a specialized memory solution for applications demanding independent port access and fast data throughput.

Memory IC Replacement Considerations

Official substitutes include the IDT71421SA4J and other variants within the 71421SA family such as the 71421SA55J. Verify pin compatibility and electrical parameters before substitution.