71V321S25PF8

Overview

The Renesas Electronics Corporation 71V321S25PF8 is a static random access memory component belonging to the 71V321 series. It features an asynchronous dual-port architecture with a storage capacity of 16 kilobits, organized as 2K by 8 bits. The device supports a parallel interface and operates within a supply voltage range of 3 volts to 3.6 volts. It provides a maximum access time of 25 nanoseconds and has a maximum power supply current of 130 milliamperes. The unit is designed for surface mount installation in a 64-pin Thin Quad Flat Package measuring 14 by 14 millimeters. It functions reliably across an operating temperature range from 0 degrees Celsius to 70 degrees Celsius.

Feature Summary

• Dual-port asynchronous architecture enabling simultaneous independent access by two masters
• Integrated hardware support for semaphore, busy, interrupt, master, and slave operations
• Parallel interface compatible with standard TTL logic levels at 5.0 volts

Applications

• High-speed data buffering between asynchronous system components
• FIFO buffer implementations requiring concurrent read and write operations
• Real-time processing systems utilizing hardware handshaking protocols

Procurement Notes

This specific part number is officially classified as obsolete and no longer manufactured by Renesas Electronics Corporation. Verification of availability should focus exclusively on authorized distributors offering remaining stock or certified upgrade alternatives. Confirm that replacement units maintain identical pinout compatibility and electrical specifications to ensure seamless integration into existing designs without circuit modification.

Selection Notes

Engineers selecting this component must account for its discontinued status when planning long-term production cycles. The primary selection criterion involves identifying a direct functional equivalent that preserves the dual-port capability and 25-nanosecond access speed. Verify that the substitute device matches the 64-TQFP package dimensions and 3-volt to 3.6-volt operating range to prevent physical or electrical incompatibility during board assembly.

Part Context

The 71V321S25PF8 belongs to the broader 71V321 family of dual-port SRAMs produced by Renesas Electronics. This series is characterized by its ability to facilitate complex communication protocols through dedicated control signals. The PF8 suffix specifically denotes the tape and reel packaging format and the 64-lead TQFP housing, distinguishing it from other variants like the PLCC package options available within the same architectural family.

Replacement Considerations

Official documentation identifies the 71V321L25PFG8 as the designated upgrade alternative for this obsolete part number. Designers should verify that the L-series variant maintains full backward compatibility regarding pin assignments and operational characteristics before finalizing any substitution strategy.