71321SA25TF8

Memory IC Overview

The 71321SA25TF8 is a high-speed 16-kbit dual-port static random-access memory (SRAM) manufactured by Renesas Electronics. It features an organization of 2K x 8 bits and supports parallel asynchronous interfaces with a maximum access time of 25 ns. The device operates on a single 5V power supply within a voltage range of 4.5V to 5.5V, drawing a maximum current of 80 mA. Designed for surface-mount applications, it is housed in a 64-pin TQFP package measuring 10x10 mm. The component includes internal interrupt logic for interprocessor communication and automatic power-down capabilities controlled by chip enable signals.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location from both ports without conflict.
• Integrated internal interrupt logic providing two flags for efficient port-to-port communications and status signaling between processors.
• Automatic power-down feature that reduces standby power consumption when the chip enable signal is deactivated.
• On-chip arbitration logic with BUSY output flag to manage data bus contention during simultaneous access scenarios.

Memory IC Applications

• Interprocessor communication links in multi-core or distributed processing systems
• Master dual-port RAM configuration in 16-bit or wider data bus expansion systems
• Battery-backed volatile memory storage requiring low standby power modes

Memory IC Procurement Notes

Verify RoHS compliance status as documentation indicates potential non-compliance for this specific suffix variant. Confirm lead times due to end-of-life production status. Ensure moisture sensitivity level 3 handling protocols are followed during assembly. Validate pinout compatibility with existing PCB footprints before integration.

Memory IC Selection Notes

Select this component for designs requiring true dual-port functionality with integrated interrupt signaling. Suitable for systems needing 25 ns access speeds within a 5V logic environment. Consider alternative packages if industrial temperature ranges (-40°C to +85°C) are required, as this commercial grade part operates from 0°C to 70°C.

Memory IC Part Context

This part belongs to the 71321SA/LA series of dual-port SRAMs. It serves as a master device capable of expanding data bus widths when paired with slave counterparts like the 71421 series. The SA suffix denotes standard commercial temperature operation, distinguishing it from LA variants which may offer battery backup retention features.

Memory IC Replacement Considerations

Public confirmed substitute: 71321LA20TFG8.