7164L85DB

Overview

The 7164L85DB is a 64K-bit (8K x 8) asynchronous static random-access memory (SRAM) manufactured by Renesas Electronics Corporation. It utilizes BICMOS technology and operates within a supply voltage range of 4.5V to 5.5V. The device features an access time of 85 ns and is housed in a 28-lead CDIP package designed for through-hole mounting. It supports a wide operating temperature range from -55°C to 125°C, ensuring reliability in demanding environments.

Feature Summary

• Asynchronous parallel interface for standard memory control
• BICMOS technology for high-speed operation
• Extended industrial temperature range capability

Applications

• Industrial control systems requiring volatile storage
• Automotive electronics operating in harsh thermal conditions
• Embedded systems needing fast data buffering

Procurement Notes

Verify component authenticity due to obsolete status. Confirm RoHS compliance as the specific listing indicates non-compliance. Check for lead-free alternatives if required by current manufacturing standards. Validate package integrity upon receipt. Ensure supplier provides traceable documentation for critical applications.

Selection Notes

Select this part for legacy designs requiring 85 ns access times in a 28-CDIP package. Consider thermal management for 125°C operation limits. Evaluate pin compatibility with existing PCB footprints. Assess supply chain stability given end-of-life status. Compare against newer CMOS SRAMs for power efficiency improvements.

Part Context

This component belongs to the 7164S35/7164L series of 64K-bit SRAMs. It shares architectural similarities with other parts in the family but differs in speed grade and temperature rating. The 'L' suffix typically denotes extended temperature capabilities compared to commercial variants.

Replacement Considerations

Direct substitutes include IDT7164L85DB. Verify pinout and electrical specifications match exactly. Check for updated packaging options if through-hole is no longer preferred.