7140LA25JI

Overview

The Renesas Electronics Corporation 7140LA25JI is an asynchronous dual-port static random-access memory (SRAM) integrated circuit. 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 and a write cycle time of 25 nanoseconds. It operates within a supply voltage range of 4.5V to 5.5V and supports a commercial operating temperature range of 0°C to 70°C. The component is housed in a 52-lead Plastic Leadless Chip Carrier (PLCC) package.

Feature Summary

• Supports simultaneous independent read and write operations at both Port A and Port B without bus contention.
• Utilizes CMOS technology for low power consumption during active and standby modes.
• Features dedicated chip select inputs to enable selective activation of individual ports.

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded processing systems
• Data logging applications requiring rapid sequential writes

Procurement Notes

Verify the specific suffix 'J' against official manufacturer documentation to confirm the exact package variant and lead finish specifications. Confirm RoHS compliance status, as historical production runs may vary. Check current lifecycle status, as this part number may be discontinued or subject to last-time buy restrictions. Ensure compatibility with existing board footprints and thermal management requirements before procurement.

Selection Notes

Select this component when a system requires true dual-port memory architecture for concurrent data handling between two independent processors or buses. The 25ns speed class is suitable for moderate-frequency microcontrollers. Consider the 52-PLCC package constraints regarding PCB space and reflow soldering profiles compared to surface-mount alternatives.

Part Context

This component belongs to the IDT 7140SA/LA family of dual-port SRAMs manufactured by Renesas Electronics. The 'LA' designation typically indicates the commercial temperature grade and specific pinout configuration. This series is designed for applications requiring high-bandwidth data sharing between disparate logic domains without complex arbitration protocols.

Replacement Considerations

Official substitutes include the 7140SA25J8 and 7130LA25JI8. Verify that replacement parts match the 52-PLCC footprint and electrical characteristics. Note that suffix variations may indicate differences in packaging quantity or moisture sensitivity levels.