71421SA25PF8

Overview

The Renesas Electronics Corporation 71421SA25PF8 is a dual-port static random-access memory (SRAM) integrated circuit with a storage capacity of 32Kb, organized as 4K words by 8 bits. It features asynchronous parallel interface operation with a maximum access time of 25 ns and a write cycle time of 25 ns. The device operates on a single voltage supply ranging from 4.5V to 5.5V and supports surface-mount installation in a 64-TQFP package measuring 14x14 mm. It functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Dual-port architecture enabling simultaneous independent access to the same memory location from two separate ports.
• Fully asynchronous operation allowing reads or writes to any memory location without clock synchronization.
• On-chip port arbitration logic manages conflicts when both ports attempt to access the same address simultaneously.

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded processing systems
• Data logging applications requiring non-volatile retention via battery backup

Procurement Notes

Verify component authenticity through authorized distributors due to discontinuation status. Confirm RoHS compliance requirements as the part may not meet current environmental standards. Validate package integrity for the 64-TQFP form factor before integration into manufacturing processes.

Selection Notes

Select this component for designs requiring true dual-port memory capabilities with asynchronous control. Ensure power supply stability within the 4.5V to 5.5V range. Consider thermal management for the -40°C to +85°C operating environment during system design.

Part Context

This part belongs to the IDT 71421SA/LA series of high-speed dual-port SRAMs. It serves as a legacy solution for applications needing independent port access. The manufacturer has transitioned focus toward newer memory technologies, making this component suitable for maintenance or specific legacy system upgrades.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing board layouts if considering alternative dual-port SRAM families.