71321LA20TF

Memory IC Overview

The Renesas Electronics Corporation 71321LA20TF is a high-speed, 16Kb (2K x 8) dual-port static random-access memory (SRAM). It features fully asynchronous operation with a maximum access time of 20 ns. The device operates on a single 5V ±10% power supply and supports battery backup for data retention down to 2V. It utilizes true dual-ported memory cells allowing simultaneous access to the same location. The component includes internal interrupt logic for interprocessor communications and on-chip port arbitration. It is housed in a 64-pin Thin Quad Flat Package (TQFP) and complies with RoHS3 standards.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations by two processors.
• Integrated internal interrupt logic providing two INT flags for efficient port-to-port communication without external discrete logic.
• On-chip port arbitration logic with BUSY output flag to manage concurrent access requests automatically.
• Automatic power-down feature controlled by chip enable signals to achieve very low standby power consumption.

Memory IC Applications

• Interprocessor communication in standalone microcontroller systems
• Master dual-port RAM configuration in 16-bit or wider data bus systems
• Battery-backed volatile memory storage requiring fast asynchronous access

Memory IC Procurement Notes

Verify the specific suffix against official documentation, as standard listings often use 'PFG8' or 'TFG8'. Confirm package dimensions match the required 64-TQFP footprint. Check moisture sensitivity level (MSL 3) requirements for surface mount assembly processes. Ensure voltage supply stability within the 4.5V to 5.5V range for proper operation.

Memory IC Selection Notes

Select this component when simultaneous read/write access from two masters is required without external arbitration hardware. Choose the LA variant over SA if industrial temperature ranges or battery backup capabilities are necessary. Verify that the 20 ns access speed meets the system timing constraints. Consider the 64-pin TQFP package availability relative to board space limitations.

Memory IC Part Context

This part belongs to the 71321SA/LA series of high-speed dual-port SRAMs manufactured by Renesas Electronics. The series is designed for applications requiring fast, error-free data exchange between processors. The 'LA' designation typically indicates compliance with stricter environmental standards compared to the 'SA' series.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers include 71321LA20PFG8 and 71321LA20TFG8. These variants share the same core specifications and pinout but may differ in packaging format or reel quantity.