71321LA25TFGI8

Memory IC Overview

The 71321LA25TFGI8 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 independent access to the same memory location from both ports simultaneously. It operates within a supply voltage range of 4.5V to 5.5V and offers an access time of 25 nanoseconds. The component is housed in a 64-pin Thin Quad Flat Package (TQFP) with dimensions of 10x10 mm. It is designed for industrial temperature ranges spanning from -40°C to +85°C.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations without conflict.
• Integrated internal interrupt logic providing two flags for efficient port-to-port communication between processors.
• On-chip arbitration logic manages bus conflicts, eliminating the need for external discrete logic components.
• Automatic power-down feature controlled by chip enable signals to achieve low standby power consumption.

Memory IC Applications

• Interprocessor communication systems requiring fast data exchange between multiple CPUs.
• Master/Slave dual-port RAM configurations expanding data bus width to 16 bits or more using compatible slave devices.
• Industrial control applications operating within extended temperature environments.
• Battery-backed memory systems utilizing low-voltage retention capabilities.

Memory IC Procurement Notes

Verify RoHS compliance status carefully, as specific suffixes may indicate non-compliance with current environmental directives. Confirm package dimensions match the 64-TQFP specification exactly. Check for moisture sensitivity level requirements during handling. Ensure the supplier provides valid traceability documentation for this discontinued series component.

Memory IC Selection Notes

Select this part when true dual-port functionality with integrated interrupt signaling is required. Compare access times against system timing constraints. Verify voltage compatibility with the 4.5V to 5.5V operating range. Consider the 64-TQFP package size for PCB layout constraints. Evaluate thermal performance within the specified industrial temperature range.

Memory IC Part Context

This component belongs to the 71321SA/LA family of high-speed dual-port SRAMs. The 'LA' designation typically indicates enhanced features such as battery backup support compared to the standard 'SA' variant. The family is designed for standalone 8-bit operation or expansion into wider data buses when paired with designated slave devices like the 71421 series.

Memory IC Replacement Considerations

The 71321LA25PFGI is listed as an upgrade alternative with similar specifications but a different package type. Verify pinout compatibility and package dimensions before substitution. Cross-reference datasheet electrical characteristics to ensure functional equivalence in the target application.