71321SA55PFI

Memory IC Overview

The 71321SA55PFI is a dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation. It provides a storage capacity of 16Kb organized as 2K x 8 bits. The device features a parallel interface with an access time and write cycle time of 55 ns. It operates within a supply voltage range of 4.5V to 5.5V and supports an industrial temperature range of -40°C to 85°C. The component is housed in a 64-TQFP (14x14) surface-mount package.

Memory IC 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.
• CMOS technology providing low power consumption characteristics suitable for battery-operated applications.

Memory IC Applications

• High-speed data buffering between microprocessors and peripheral devices.
• Cache memory implementation in embedded computing systems.
• Data logging and temporary storage in industrial automation controllers.

Memory IC Procurement Notes

This component has been officially discontinued and is no longer in production. Verification of availability should focus exclusively on authorized distributors offering remaining stock or approved upgrade alternatives. Sourcing from unauthorized channels carries significant risks regarding authenticity, handling integrity, and long-term reliability. Confirm RoHS compliance status prior to integration, as the original specification indicates non-compliance.

Memory IC Selection Notes

Designers requiring this specific logic level and speed profile must evaluate the designated upgrade path. The recommended replacement, 71321LA25PFGI, offers enhanced performance specifications while maintaining functional compatibility. Selection criteria should prioritize pin-to-pin compatibility and electrical parameter alignment to ensure seamless migration without extensive circuit redesign.

Memory IC Part Context

The 71321SA series belongs to Renesas' established portfolio of high-performance static random-access memories. This specific model represents the standard speed grade variant within the 16Kb density class. The product line is engineered for robustness in demanding electronic environments, supporting critical data retention requirements for legacy and specialized hardware platforms.

Memory IC Replacement Considerations

The official upgrade substitute is 71321LA25PFGI. This component maintains the same package footprint and logical interface while providing improved operational speeds. Engineers must verify that the system timing constraints accommodate the new device's electrical characteristics before finalizing the transition.