71421SA4J8

Overview

The Renesas Electronics Corporation 71421SA4J8 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 supports parallel data interfaces and operates within a supply voltage range of 4.5V to 5.5V. It features an access time of 4 nanoseconds and is designed for surface-mount installation in a 52-lead Plastic Leadless Chip Carrier (PLCC) package. The component functions reliably across a commercial operating temperature range of 0°C to 70°C.

Feature Summary

• Dual-port architecture enabling independent simultaneous access from two distinct processors or systems
• Asynchronous operation allowing flexible timing control without reliance on a global clock signal
• Parallel interface supporting standard byte-wide data transfer operations

Applications

• High-speed data buffering between asynchronous system components
• Cache memory implementation in embedded processing architectures
• Data storage in industrial automation control systems

Procurement Notes

Verify the specific suffix J8 to confirm the 52-PLCC package configuration and lead-free status requirements. Confirm that the 4ns speed grade matches the target system timing constraints. Check current availability status as older generation SRAMs may be subject to discontinuation notices. Ensure compatibility with existing PCB footprints and reflow soldering profiles for PLCC packages.

Selection Notes

Select this component when dual-port functionality is required for concurrent read/write operations. The 16Kb density suits small-scale buffering tasks where low latency is critical. Consider the 52-PLCC package if board space allows for larger surface-mount footprints. Evaluate power consumption against system thermal limits given the 5V logic family characteristics.

Part Context

This part belongs to the IDT 71421SA series of high-performance dual-port SRAMs manufactured by Renesas Electronics. The series offers various speed grades to accommodate different system clock requirements. These devices are commonly used in telecommunications and networking equipment requiring reliable, fast memory access.

Replacement Considerations

Consult official Renesas documentation for direct pin-compatible substitutes within the same speed grade. Verify that alternative parts maintain the 52-PLCC form factor and 16Kb organization. Cross-reference electrical specifications to ensure voltage and timing compatibility.