71321SA20TF8

Memory IC Overview

The Renesas Electronics Corporation 71321SA20TF8 is a high-speed, 16Kb (2K x 8) Dual-Port Static RAM featuring asynchronous parallel interface and internal interrupt logic. It operates on a single 5V ±10% power supply with access times of 20 ns. The device supports simultaneous independent access to the same memory location by both ports. It includes two INT flags for port-to-port communication and on-chip arbitration logic. The component is housed in a 64-pin TQFP package and functions as a MASTER dual-port RAM.

Memory IC Feature Summary

• True dual-ported memory cells enabling simultaneous access to identical memory locations without conflict
• Integrated interrupt logic providing two INT flags for direct port-to-port processor communication
• On-chip port arbitration logic with BUSY output flag to manage concurrent bus access
• Automatic power-down mode controlled by Chip Enable (CE) for low standby power consumption

Memory IC Applications

• Interprocessor communications in multi-CPU systems
• Master Dual-Port RAM configurations expanding data bus width to 16 bits or more when paired with SLAVE devices
• Stand-alone 8-bit Dual-Port RAM applications requiring full-speed error-free operation

Memory IC Procurement Notes

Verify component authenticity through authorized distributors or official Renesas channels. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) prior to assembly. Check for End-of-Life (EOL) notifications or Product Change Notices (PCN) affecting availability. Ensure pinout compatibility with existing PCB layouts before finalizing procurement decisions.

Memory IC Selection Notes

Select this component for designs requiring true dual-port memory with hardware-managed arbitration. Suitable for systems needing fast interprocessor signaling via built-in interrupt flags. Consider package constraints as it is available in TQFP formats. Evaluate power requirements against the specified 5V supply range and standby current characteristics for battery-backed operations if applicable.

Memory IC Part Context

The 71321 series represents a family of high-speed CMOS Dual-Port SRAMs designed for efficient data sharing between processors. The 71321SA variant specifically denotes the asynchronous version with standard industrial temperature ranges. This part integrates master functionality, allowing it to coordinate with slave counterparts like the 71421 for wider data buses without external logic.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include 71321LA20TFG.