7140LA55PF8

Overview

The 7140LA55PF8 is an asynchronous dual-port static random-access memory (SRAM) integrated circuit manufactured by Renesas Electronics Corporation. It provides a storage capacity of 8 kilobits, organized as 1K words by 8 bits. The device features a parallel interface with a maximum access time of 55 nanoseconds. It operates within a supply voltage range of 4.5V to 5.5V and is housed in a 64-pin Thin Quad Flat Package (TQFP) measuring 14x14 mm. The component supports surface-mount installation and is designed for industrial temperature ranges.

Feature Summary

• Dual-port architecture enabling independent simultaneous read/write operations from two distinct processor ports.

Applications

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

Procurement Notes

This component is officially discontinued and no longer manufactured by Renesas Electronics Corporation. Verification of availability requires checking authorized distributors for remaining stock or approved replacement part numbers. Ensure that any substitute components maintain compatibility with the original 55 ns access time, 5V logic levels, and 64-TQFP physical footprint to guarantee proper system integration.

Selection Notes

Select this component only if legacy support for the 7140LA series is required. Verify that the design accommodates the specific 64-TQFP package dimensions and pinout configuration. Confirm that the application environment remains within the specified operating temperature limits and that the power supply strictly adheres to the 4.5V to 5.5V range to prevent functional failure.

Part Context

The 7140LA55PF8 belongs to the Renesas 7140LA family of high-speed dual-port SRAMs. This series was engineered for applications requiring fast, non-blocking data exchange between two masters. The 'PF8' suffix denotes the specific 64-lead TQFP plastic package variant. These devices were widely utilized in networking hardware and specialized computing architectures prior to their discontinuation.

Replacement Considerations

Consult official Renesas documentation for verified cross-reference part numbers. Substitutes must match the 8Kb capacity, 55 ns speed, and 64-TQFP form factor. Verify electrical compatibility before integration.