71V321L25TFGI

Overview

The Renesas Electronics Corporation 71V321L25TFGI is a 16-kbit (2K x 8) asynchronous dual-port static random-access memory. It operates on a single 3.3V power supply with a voltage range of 3.0V to 3.6V. The device features a 25 ns access time and supports parallel interface communication. It is housed in a 64-pin TQFP surface-mount package. The component supports an industrial operating temperature range from -40°C to +85°C and includes automatic power-down functionality for low standby current.

Feature Summary

• True dual-ported architecture enabling simultaneous independent access to the same memory location by both ports.
• On-chip port arbitration logic manages conflicts when both ports attempt to access the same address simultaneously.
• Interrupt flags facilitate direct port-to-port communication without host processor intervention.
• Automatic power-down mode controlled by chip enable signals minimizes standby power consumption.

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded systems
• Data storage in industrial control networks
• Real-time processing buffers in automotive electronics

Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature grade (-40°C to +85°C). Confirm the 'TFG' designation matches the required 64-pin TQFP package dimensions. Ensure RoHS compliance status aligns with project requirements, as manufacturing sites may vary. Cross-reference the datasheet revision date to confirm pinout consistency with existing designs.

Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration circuitry. The 25 ns speed suits applications needing fast asynchronous response. The 64-TQFP package offers a compact footprint for dense PCB layouts. Consider the 3.3V supply constraint against system voltage rails. Evaluate the interrupt flag utility for reducing CPU overhead in complex multi-port interactions.

Part Context

This part belongs to the 71V321L series of high-speed dual-port SRAMs. It serves as a successor or variant to older generations like the 71V321S series, offering improved temperature ranges and packaging options. The L-series typically denotes lower power consumption and extended industrial temperature capabilities compared to commercial variants.

Replacement Considerations

The 71V321L25TFG is listed as a similar alternative within the manufacturer's portfolio. Verify if the absence of the 'I' suffix affects the temperature rating. Check if the 71V321L25PFGI8 variant meets mechanical constraints, noting its reel packaging versus tray options.