71321LA20PF

Memory IC Overview

The Renesas Electronics Corporation 71321LA20PF 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, supporting a voltage range of 4.5V to 5.5V. It utilizes true dual-ported memory cells allowing simultaneous independent access to the same location from either port. The component is housed in a 64-pin Thin Quad Flat Package (TQFP) and supports battery backup for data retention.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to identical memory locations from both ports without conflict.
• Integrated internal interrupt logic providing two INT flags for efficient interprocessor communication between connected systems.
• 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 minimize standby power consumption.

Memory IC Applications

• Interprocessor communication links in distributed computing architectures
• Master dual-port RAM configuration in 16-bit or wider data bus expansion systems
• High-speed cache memory buffers requiring simultaneous read/write access

Memory IC Procurement Notes

Verify package compatibility as the suffix 'PFG' indicates tape-and-reel packaging while 'PF' typically denotes tray packaging; confirm RoHS compliance status as LA series devices generally meet current environmental standards unlike older SA variants. Check lead times due to potential long manufacturing cycles.

Memory IC Selection Notes

Select this model for applications requiring fast 20 ns access times and integrated interrupt signaling. Ensure the system design accommodates the 64-pin TQFP footprint and 5V logic levels. Consider the 71421LA series if expanding to 16-bit width using master-slave configurations.

Memory IC Part Context

Part of the 71321SA/LA family of high-speed dual-port SRAMs. The 'LA' designation indicates industrial temperature availability and RoHS compliance compared to the legacy 'SA' series. Designed for standalone 8-bit use or as a master unit in expanded width systems.

Memory IC Replacement Considerations

The 71321LA20PFG is a direct functional equivalent with tape-and-reel packaging. The 71321LA25PFG offers slower 25 ns access. Legacy SA series parts like 71321SA20PF are obsolete and require upgrade to LA series equivalents.