71321LA20TFG8

Memory IC Overview

The 71321LA20TFG8 is a high-speed 16Kb (2K x 8) dual-port static random-access memory manufactured by Renesas Electronics Corporation. It features asynchronous parallel interface operation with a maximum access time of 20 ns. The device operates on a single 5V ±10% power supply, ranging from 4.5V to 5.5V. It utilizes true dual-ported memory cells allowing simultaneous independent access to the same location from two ports. The component is housed in a 64-pin Thin Quad Flat Package (TQFP) and supports an industrial operating temperature range of 0°C to 70°C.

Memory IC Feature Summary

• True dual-ported architecture enabling simultaneous independent read/write access to identical memory locations without conflict.
• Integrated internal interrupt logic providing two INT flags for efficient interprocessor communication between connected ports.
• On-chip port arbitration logic manages bus contention automatically, eliminating the need for external discrete control circuitry.
• Supports expansion to 16-bit or wider data buses when configured as a MASTER unit paired with a SLAVE device.

Memory IC Applications

• Interprocessor communication links in distributed computing systems
• High-speed data buffering between microprocessors and peripherals
• Master/Slave dual-port memory configurations for expanded word width systems
• Real-time data exchange in embedded control architectures

Memory IC Procurement Notes

Verify the specific suffix 'TFG8' against official Renesas documentation to confirm package dimensions and tape-and-reel specifications. Ensure compatibility with existing board layouts for the 64-TQFP form factor. Confirm that the 0°C to 70°C commercial temperature rating meets system environmental requirements. Cross-reference RoHS compliance status with current manufacturing notices.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration logic. Suitable for applications needing fast inter-CPU messaging via integrated interrupt flags. Choose over single-port SRAM when concurrent host and peripheral access to shared data is necessary. Verify voltage tolerance matches the 5V ±10% supply constraint.

Memory IC Part Context

This part belongs to the 71321LA series of dual-port SRAMs, designed for standalone 8-bit operation or as a master unit in 16-bit systems. It shares architectural similarities with the 71421 slave counterpart. The LA designation indicates commercial temperature range availability, distinguishing it from SA variants which support extended industrial ranges. It replaces older IDT-branded equivalents within the same functional family.

Memory IC Replacement Considerations

Publicly confirmed substitute: 71321LA20PFG8. This alternative offers identical electrical performance and pinout but differs in packaging configuration. Verify mechanical fitment before substitution.