71321SA25PF8

Memory IC Overview

The Renesas Electronics Corporation 71321SA25PF8 is a high-speed, asynchronous dual-port static random-access memory (SRAM) device. It features a storage capacity of 16 kilobits organized as 2K words by 8 bits. The component supports parallel interface operations with a maximum access time of 25 nanoseconds. It operates on a single 5V power supply within a voltage range of 4.5V to 5.5V. The device is housed in a 64-pin Thin Quad Flat Package (TQFP) with dimensions of 14x14 mm. It includes internal interrupt logic for interprocessor communication and automatic power-down capabilities controlled by chip enable signals.

Memory IC Feature Summary

• True dual-ported memory architecture allowing simultaneous independent access to the same memory location from both ports without conflict.
• Integrated internal interrupt logic providing two flags for efficient port-to-port communications and interprocessor signaling.
• Automatic power-down feature that reduces standby power consumption when the chip enable signal is deactivated.
• On-chip arbitration logic manages bus conflicts, ensuring error-free operation when expanding data bus width using slave devices.

Memory IC Applications

• Interprocessor communication links between microprocessors or digital signal processors
• Master dual-port RAM configurations in systems requiring expanded 16-bit or wider data buses
• High-speed buffering applications in telecommunications equipment
• Data acquisition systems requiring simultaneous read/write access

Memory IC Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm RoHS compliance requirements as this specific variant may not meet current environmental standards. Validate package integrity upon receipt, as moisture sensitivity level 3 requires strict handling protocols. Ensure replacement parts match pinout and electrical specifications exactly to maintain system compatibility.

Memory IC Selection Notes

Select this component for designs requiring true dual-port functionality with integrated interrupt signaling. Consider the 25ns access speed against system timing requirements. Evaluate the 64-TQFP package for surface-mount assembly constraints. Compare against the 71321LA series if battery backup or industrial temperature ranges are necessary, noting the voltage and thermal differences between SA and LA variants.

Memory IC Part Context

This part belongs to the 71321SA family of dual-port SRAMs manufactured by Renesas Electronics. It serves as a master device capable of interfacing with slave counterparts like the 71421SA to form wider memory architectures. The SA suffix indicates standard commercial temperature range operation. This series is designed to eliminate external logic for bus arbitration in multi-processor systems.

Memory IC Replacement Considerations

The 71321LA20PFG8 is listed as an upgrade alternative by the manufacturer. Verify functional equivalence regarding access times and interrupt logic before substitution. Note potential differences in operating temperature ranges and RoHS compliance status between the discontinued SA model and the LA replacement.