71421SA25J

Overview

The Renesas 71421SA25J is a dual-port static random-access memory (SRAM) integrated circuit with a storage capacity of 16 kbit, organized as 2K x 8 bits. It features an asynchronous parallel interface with a maximum access time of 25 ns. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation in a 64-TQFP package. It is designed for industrial temperature ranges from 0°C to +70°C.

Feature Summary

• Dual-port architecture enabling independent simultaneous access by two processors
• Asynchronous operation without clock synchronization requirements
• Parallel data interface for direct system bus connectivity

Applications

• High-speed data buffering between microprocessors
• Cache memory implementation in embedded systems
• Data logging applications requiring rapid write cycles

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance requirements against project specifications, as this variant may not meet current environmental standards. Validate package pinout compatibility during design-in phase to ensure correct footprint alignment.

Selection Notes

Select this component when dual-port functionality is required for concurrent processor access. Ensure the 5V logic level matches system voltage rails. Consider the 64-TQFP package constraints for PCB layout density. Evaluate thermal dissipation needs within the specified operating temperature range.

Part Context

This part belongs to the Renesas 71421SA/LA series of dual-port SRAMs. It shares architectural similarities with other members like the 71321SA and 71421LA variants, differing primarily in speed grades and package options. The series provides non-volatile-like persistence for volatile memory applications requiring high-speed bidirectional data transfer.

Replacement Considerations

Public confirmed substitute: 71421LA20PFG. Verify electrical parameter compatibility before substitution.