The UPD4164C-15 is a 65,536-bit (64K) Dynamic Random Access Memory (DRAM) chip manufactured by NEC. It's organized as 64K x 1 bit and has an access time of 150ns. This DRAM is designed for applications requiring moderate speed and density, such as older microcomputers, embedded systems, and certain industrial control equipment.

Applications:

• Early Personal Computers: Used as main memory in vintage personal computers.
• Embedded Systems: Employed in embedded control systems requiring moderate memory capacity.
• Industrial Control Systems: Utilized in older programmable logic controllers (PLCs) and industrial automation devices.
• Test Equipment: Integrated into older test and measurement equipment for temporary data storage.
• Arcade Games: Found in older arcade game systems for storing game data and graphics.

Features:

• 64K x 1 bit Organization: Provides a 65,536-bit memory capacity.
• 150ns Access Time: Offers a moderate access speed for read and write operations.
• Single +5V Power Supply: Operates on a single +5V power supply.
• TTL Compatible: Compatible with standard TTL logic levels for straightforward interfacing.
• Dynamic Refresh: Requires periodic refresh cycles to maintain data integrity.

Benefits:

• Moderate Speed and Capacity: Offers a balance between speed and memory density for various applications.
• Easy to Interface: TTL compatibility simplifies integration with other components.
• Reliable Data Storage: Provides reliable data storage when proper refresh techniques are applied.
• Cost-Effective: A cost-effective memory solution for applications where high speed is not critical.
• Widespread Availability: Replacement parts are readily available for legacy systems.

The UPD4164C-15 typically comes in a 16-pin DIP (Dual In-line Package). It requires a refresh cycle to maintain data integrity. Adequate decoupling capacitors are necessary to ensure stable power supply and prevent noise. For specific timing and voltage requirements, consult the datasheet. While newer memory technologies offer faster speeds and higher densities, the UPD4164C-15 remains relevant for maintaining and repairing older systems.