71V30L55TFI

Overview

The 71V30L55TFI is a dual-port static random access memory (SRAM) manufactured by Renesas Electronics Corporation. It features an 8 kbit storage capacity organized as 1K x 8 bits. The device supports asynchronous parallel interface operation with a maximum access time of 55 ns. It operates on a single 3.3V power supply within the range of 3V to 3.6V. The component is housed in a 64-pin Thin Quad Flat Package (TQFP) measuring 10x10 mm. It supports an industrial operating temperature range from -40°C to +85°C and includes moisture sensitivity level 3 certification.

Feature Summary

• True dual-ported architecture enabling simultaneous independent access to any memory location from either port without conflict.
• On-chip port arbitration logic manages concurrent read/write operations between the two ports automatically.
• Integrated interrupt flags facilitate direct communication and status signaling between Port A and Port B.
• Automatic power-down mode reduces standby current when chip enable signals are deactivated.

Applications

• High-speed data buffering in telecommunications equipment requiring low-latency bidirectional transfer.
• Network switch and router architectures utilizing dual-port RAM for packet processing queues.
• Industrial control systems needing isolated data exchange between separate processor domains.
• Embedded applications requiring battery-backed data retention during main power loss events.

Procurement Notes

Verify the specific suffix 'I' indicates the industrial temperature grade (-40°C to +85°C) compared to commercial variants. Confirm package marking matches the 64-TQFP specification. Check RoHS compliance status as older batches may differ. Ensure design-in compatibility with existing PCB footprints for the 10x10mm TQFP outline. Validate that the 55ns access speed meets system timing requirements.

Selection Notes

Select this part when simultaneous independent access to shared memory is required without external arbitration hardware. Choose the 55ns variant if system clock speeds allow for slower access times, potentially offering cost advantages over faster models like the 25ns or 35ns versions. Ensure the application environment stays within the specified -40°C to +85°C range. Verify that the 3.3V LVTTL I/O levels match the interfacing microcontroller or FPGA voltage standards.

Part Context

This component belongs to the Renesas 71V30L series of high-speed dual-port SRAMs. The series offers various access speeds and temperature grades to suit different embedded memory needs. The 71V30L family is designed for applications requiring fast, non-blocking data sharing between two independent masters. It serves as a critical interconnect element in complex digital systems where data integrity and speed are paramount.

Replacement Considerations

Direct pin-compatible replacements within the same series include the 71V30L25TFI and 71V30L35TFI, which offer faster access times but must be verified for thermal and electrical compatibility. Cross-brand equivalents require careful verification of pinout, voltage levels, and timing parameters. Always consult official datasheets before substituting to ensure functional equivalence.