71321LA20PFG

Memory IC Overview

The Renesas Electronics Corporation 71321LA20PFG is a high-speed, 16Kb (2K x 8) dual-port static random-access memory (SRAM). It features asynchronous parallel interface operation with a maximum access time of 20 ns. The device operates on a single 5V ±10% power supply and supports battery backup data retention down to 2V. It is housed in a 64-pin Thin Quad Flat Package (TQFP) suitable for surface mount technology.

Memory IC Feature Summary

• True dual-ported memory cells enabling simultaneous independent access to the same memory location from both ports without conflict.
• Integrated internal interrupt logic providing two INT flags for efficient interprocessor communication and synchronization.
• On-chip port arbitration logic with BUSY output flag to manage bus contention during simultaneous access attempts.
• Automatic power-down feature controlled by chip enable signals to minimize standby power consumption.

Memory IC Applications

• Stand-alone 8-bit dual-port RAM systems requiring fast asynchronous data exchange.
• Master dual-port RAM configurations paired with 71421 Slave devices for expanded 16-bit or wider data buses.
• Interprocessor communication interfaces in embedded systems utilizing internal interrupt signaling.

Memory IC Procurement Notes

Verify the package suffix against official documentation; 'PFG' typically denotes TQFP-64. Confirm RoHS compliance status as manufacturing sources may vary. Check current lifecycle status as older variants may be discontinued. Ensure voltage levels match system requirements for 5V operation and 2V battery backup support.

Memory IC Selection Notes

Select this component when true dual-port capability with internal arbitration is required for 8-bit applications. Consider the 71421 series if 16-bit width expansion is needed. Verify temperature range suitability, as LA series typically covers commercial temperatures. Ensure pin compatibility with existing PCB layouts designed for 64-pin TQFP packages.

Memory IC Part Context

This part belongs to the 71321SA/LA family of high-speed dual-port SRAMs. It serves as a master device in multi-port architectures. The LA suffix indicates commercial temperature range availability. It replaces earlier SA series parts with updated packaging and compliance features while maintaining functional compatibility.

Memory IC Replacement Considerations

Public confirmed substitute: 71321LA20PFGI. Verify package dimensions and pinout compatibility before substitution. Ensure electrical parameters such as access time and voltage ranges remain within system specifications.