71V321L55TFI

Overview

The 71V321L55TFI is a dual-port static random-access memory (SRAM) integrated circuit manufactured by Renesas Electronics Corporation. It provides a storage capacity of 16 kilobits, organized as 2K words by 8 bits. The device features an asynchronous parallel interface with a maximum access time and write cycle time of 55 nanoseconds. It operates within a supply voltage range of 3 volts to 3.6 volts. The component is housed in a 64-lead Thin Quad Flat Package (TQFP) with dimensions of 10x10 millimeters. It supports surface-mount installation and functions across an operating temperature range from -40°C to +85°C.

Feature Summary

• Dual-port architecture enabling independent simultaneous read/write operations on both ports
• Asynchronous parallel interface for straightforward integration into digital systems
• Low-voltage operation compatible with standard 3.3V logic levels

Applications

• Data buffering in high-speed communication interfaces
• Cache memory implementation in embedded processing systems
• Real-time data logging applications requiring fast access times

Procurement Notes

Verify the exact suffix configuration against official Renesas documentation, as variations such as TFI8 or TF8 may indicate specific packaging or labeling changes. Confirm RoHS compliance status, as certain variants in this series are noted as non-compliant. Check current production status, as many components in the 71V321L family have reached end-of-life stages. Ensure that the selected package type matches the intended PCB footprint and assembly requirements.

Selection Notes

Select this component when a system requires independent dual-port access for concurrent data handling without bus contention. The 55ns speed class offers a balance between performance and power consumption for general-purpose asynchronous applications. Consider the 64-TQFP package for its thermal characteristics and pin density relative to smaller packages. Evaluate the 3V to 3.6V supply requirement against the target system's voltage rails to ensure stable operation under all load conditions.

Part Context

This part belongs to the Renesas 71V321L series of low-power dual-port SRAMs. The series typically includes variants with different access speeds, such as 25ns and 35ns models, and varying voltage ranges including 5V options like the 71321SA series. The 'L' designation generally indicates the low-voltage 3.3V operation variant. These devices are designed for applications requiring high reliability and fast data throughput in compact form factors.

Replacement Considerations

Direct replacements depend on matching the 55ns speed, 3.3V supply, and 64-TQFP package. Verify if alternative manufacturers offer electrically equivalent parts with identical pinouts. For upgraded performance, consider faster access time variants within the same Renesas family if voltage and package compatibility allow.