71V321S55PFI

Overview

The Renesas Electronics Corporation 71V321S55PFI is a 16Kb (2K x 8) asynchronous dual-port static random-access memory (SRAM). It features a parallel interface with a maximum access time of 55 ns and a write cycle time of 55 ns. The device operates on a single power supply voltage ranging from 3.0 V to 3.6 V. It is housed in a 64-lead Thin Quad Flat Package (TQFP) measuring 14x14 mm, designed for surface-mount installation.

Feature Summary

• Supports simultaneous independent read/write operations at both Port A and Port B without bus contention.
• Provides high-speed data transfer capabilities suitable for buffering and cache applications.
• Operates within a standard industrial temperature range of -40°C to +85°C.

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded systems
• Data storage in industrial control networks

Procurement Notes

This component has reached end-of-life status and is no longer manufactured by Renesas Electronics. Verification of current availability requires checking authorized distributors for remaining stock or obsolete inventory. Procurement should prioritize the recommended upgrade replacement part to ensure long-term supply stability and compliance with RoHS standards, as the original unit does not meet current environmental regulations.

Selection Notes

Designers requiring this specific memory configuration must account for the discontinuation of the 71V321S55PFI. Selection should focus on the designated upgrade path, specifically the 71V321L25PFG series, which offers enhanced performance and regulatory compliance. Engineers must verify pin compatibility and electrical characteristics against the new replacement datasheet before finalizing the bill of materials.

Part Context

The 71V321S55PFI belongs to the Renesas 71V321S family of asynchronous dual-port SRAMs. This family is engineered for applications requiring independent access to shared memory resources. The 'S' suffix typically denotes the 3.3V operating voltage variant, while the '55' indicates the 55 ns speed grade. These components are widely used in legacy designs requiring robust, non-volatile-free data retention during power cycles.

Replacement Considerations

The official upgrade replacement is the 71V321L25PFGI. This newer generation part offers improved specifications and RoHS compliance. Designers should review the updated datasheet for any changes in pinout or electrical parameters before transitioning production.