7140LA35L48B

Overview

The Renesas Electronics Corporation 7140LA35L48B is an asynchronous dual-port static random access memory (SRAM) integrated circuit. It provides a storage capacity of 32 kilobits, organized as 4K words by 8 bits. The device features a parallel interface with a maximum access time of 35 nanoseconds. It operates within a supply voltage range of 4.5 volts to 5.5 volts and supports surface mount installation in a 48-lead Plastic Leaded Chip Carrier (PLCC) package.

Feature Summary

• Dual-port architecture enabling independent simultaneous access from two separate systems or processors.

Applications

• Data buffering in high-speed digital communication systems.

Procurement Notes

This component is officially designated as obsolete by the manufacturer. Verification of availability requires checking authorized distributors for remaining stock or last-time-buy status. Compliance with RoHS standards is not confirmed for this specific part number. Engineers must validate pin compatibility and electrical specifications before integrating any replacement components into existing designs.

Selection Notes

Selection should focus on verifying the required 35 ns access speed and 32 Kbit capacity against system timing constraints. The 48-pin PLCC package dimensions must match the printed circuit board footprint. Ensure the design accommodates the 4.5V to 5.5V operating voltage range and assesses thermal requirements for the specified industrial temperature limits.

Part Context

The 7140LA series belongs to Renesas' legacy line of asynchronous SRAMs. These devices were designed for applications requiring fast, non-volatile data retention during power cycles and independent port access. The LA suffix typically denotes specific speed grades and package variations within the broader family of dual-port memory solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct pin-to-pin replacements may require careful evaluation of electrical parameter differences and physical package compatibility.