The TMM41464P-15 is a 262,144-bit (64K x 4) Dynamic Random Access Memory (DRAM) manufactured by Toshiba Semiconductor and Storage. This DRAM is designed for applications requiring temporary storage of data with a byte-wide organization. The '-15' indicates an access time of 150ns.

Applications

• Computer Systems: Utilized as main memory in older computer systems and workstations.
• Graphics Cards: Employed as video memory in early graphics cards.
• Printers: Used as buffer memory to store print data.
• Industrial Control Systems: Found in industrial automation equipment for temporary data storage.
• Telecommunications Equipment: Used in networking devices for buffering data.

Features

• Byte-Wide Organization: Organized as 64K x 4 bits, enabling byte-wide data access.
• Access Time: 150ns access time allows for quick data retrieval.
• Single 5V Power Supply: Operates on a single 5V power supply.
• Multiplexed Address Inputs: Row and column addresses are multiplexed to reduce the number of pins required.
• TTL Compatibility: Compatible with standard TTL logic levels.
• Refresh Required: Requires periodic refreshing to retain stored data.

Benefits

• Byte-Oriented Access: Byte-wide organization simplifies data manipulation in byte-oriented systems.
• Good Performance: 150ns access time provides reasonable performance for many applications.
• Simplified Power Supply: Single 5V power supply reduces system complexity.
• Easy Integration: TTL compatibility allows for easy integration with other components.
• Cost-Effective Solution: Provides a cost-effective memory solution.

Additional Details

The TMM41464P-15 is typically packaged in an 18-pin DIP (Dual In-line Package). It is a dynamic RAM, so it must be refreshed periodically to retain the data. Electrostatic discharge (ESD) precautions are important when handling this device. Refer to the Toshiba datasheet for detailed electrical characteristics, timing diagrams, and refresh specifications. The 64K x 4 organization makes it particularly suitable for applications dealing with byte-sized data. Power supply decoupling capacitors are important for stable operation.