The OKI/Metcal MSM518221-30JS is a 256K x 4 bit Dynamic RAM (DRAM). It's a type of semiconductor memory commonly used in various electronic devices for temporary data storage. The -30 indicates an access time of 30ns.

Applications

• Computer memory
• Graphics cards
• Printers
• Digital signal processing (DSP) systems
• Embedded systems

Features

• 256K x 4 bit organization
• Fast access time (30ns)
• Low power consumption
• TTL compatible inputs and outputs
• Single 5V power supply
• Refresh cycle required to maintain data

Benefits

• Provides high-speed data storage.
• Reduces system power consumption.
• Simplifies system design with its TTL compatible interface.
• Offers a cost-effective solution for memory applications.

Additional Details

This DRAM requires a refresh cycle to maintain data integrity. The access time of 30ns is a key performance parameter. The operating voltage is typically 5V. It is critical to observe proper timing requirements, including setup and hold times. DRAMs are sensitive to static electricity, so proper handling procedures are essential. The datasheet provides specific details on timing diagrams, operating conditions, and other characteristics.