71321LA25TFI8

Memory IC Overview

The 71321LA25TFI8 is a high-speed, asynchronous dual-port static random-access memory (SRAM) manufactured by Renesas Electronics Corporation. It features a storage capacity of 16 kilobits organized as 2K x 8 bits. The device supports parallel interface operation with an access time of 25 nanoseconds. It operates on a single 5V power supply within a voltage range of 4.5V to 5.5V. The component is housed in a 64-pin Thin Quad Flat Package (TQFP) measuring 10x10 mm and is rated for industrial operating temperatures from -40°C to +85°C.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location by two processors without conflict.
• Integrated internal interrupt logic providing two dedicated flags for efficient port-to-port communication and synchronization.
• On-chip arbitration logic manages bus conflicts automatically, allowing expansion to 16-bit or wider data buses when paired with compatible slave devices.

Memory IC Applications

• Interprocessor communication links in distributed computing systems
• Master-slave memory configurations for expanded data bus width systems
• High-speed buffer applications requiring concurrent read/write operations

Memory IC Procurement Notes

Verify component authenticity through authorized distributors due to potential obsolescence status. Confirm RoHS compliance requirements as older batches may not meet current environmental standards. Validate package integrity upon receipt, as moisture sensitivity level 3 requires proper handling. Cross-reference datasheet revisions to ensure pinout compatibility with existing designs.

Memory IC Selection Notes

Select this component for applications requiring true simultaneous access to shared memory resources without external arbitration logic. Ensure system design accommodates the 5V TTL-compatible power supply requirements. Consider the 64-TQFP package dimensions for PCB layout constraints. Verify that the 25ns access speed meets the timing requirements of the connected processors.

Memory IC Part Context

This part belongs to the 71321 series of dual-port SRAMs, designed for high-performance multiprocessing environments. The 'LA' suffix typically indicates specific voltage or temperature variants within the family. The 'TFI8' designation specifies the TQFP-64 surface-mount package configuration. This series integrates advanced arbitration logic to simplify system design compared to standard dual-port memories.

Memory IC Replacement Considerations

The 71321LA25TFGI8 is listed as an upgrade alternative. Verify package compatibility and electrical specifications before substitution. Check for any differences in interrupt logic or arbitration behavior between the original and replacement parts.