7140LA25PFI8

Overview

The 7140LA25PFI8 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 25 nanoseconds. It is housed in a 64-pin Thin Quad Flat Package (TQFP) measuring 14x14 millimeters. The component operates within a supply voltage range of 4.5V to 5.5V and supports surface-mount installation.

Feature Summary

• Supports simultaneous independent access from two distinct ports for concurrent read/write operations
• Utilizes a parallel interface architecture for standard data transfer protocols
• Designed for asynchronous operation without requiring a system clock signal

Applications

• Data buffering in high-speed digital communication systems
• Cache memory implementation in embedded processing architectures
• FIFO buffer applications in industrial control logic

Procurement Notes

This specific part number is officially classified as obsolete and no longer manufactured by Renesas Electronics. Procurement must rely on secondary market distributors or surplus inventory channels. Verify the authenticity and physical condition of available units carefully, as original packaging may be unavailable. Confirm that the source documentation matches the exact suffix PFI8 to ensure pinout compatibility.

Selection Notes

Engineers selecting this component should prioritize designs compatible with 5V logic levels and TQFP-64 footprints. The dual-port capability allows for complex data sharing between processors but requires careful bus arbitration management. Consider the 25ns access speed when evaluating timing constraints for the target application's data throughput requirements.

Part Context

The 7140LA series represents Renesas' legacy line of CMOS dual-port SRAM devices. These components were widely used before the prevalence of synchronous high-bandwidth memories. The LA variant specifically denotes the package and speed grade within the broader family, serving as a bridge between single-port SRAMs and more complex FIFO structures.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the available documentation due to the component's obsolete status. Designers should consult official Renesas obsolescence notices for recommended cross-references or contact authorized distributors for validated replacement options.