7164L55DB

Overview

The Renesas Electronics Corporation 7164L55DB is an asynchronous static random-access memory (SRAM) integrated circuit with a total capacity of 64Kbits. The device is organized as 8K words by 8 bits and operates at a standard voltage of 5.0V. It features a parallel interface architecture and provides a maximum access time of 55 nanoseconds. The component is housed in a 28-lead Ceramic Dual In-line Package (CDIP).

Feature Summary

• Asynchronous operation with parallel data interface for direct system integration.
• Low-power L-version design includes reduced power standby mode capabilities.
• Battery backup data retention support for maintaining stored information during power loss.

Applications

• General-purpose volatile memory storage in industrial control systems.
• Data buffering in embedded computer architectures.
• Backup memory applications requiring battery-supported data preservation.

Procurement Notes

Verify current availability status as the product may be discontinued or subject to limited supply constraints. Confirm RoHS compliance requirements, as specific variants may not meet current environmental standards. Ensure compatibility with existing 5.0V logic levels and CDIP-28 footprint specifications before procurement.

Selection Notes

Select this component when a 5.0V asynchronous SRAM with 55ns access speed is required. The low-power variant supports battery backup scenarios. Verify package compatibility with CDIP-28 sockets or PCB layouts. Consider end-of-life status for long-term production planning.

Part Context

This part belongs to the 7164S35 series of CMOS static RAMs manufactured by Renesas Electronics. It shares architectural similarities with other members like the 7164L85DB but differs in access speed and operating voltage characteristics. The series targets general memory applications requiring reliable non-volatile-like behavior through battery backup.

Replacement Considerations

Direct substitutes include IDT7164S35DB. Verify pinout and electrical parameters match exactly. Check for equivalent access times and voltage tolerances. Confirm package type remains CDIP-28 for mechanical compatibility.