The D2186-25 is a 64K x 1-bit Dynamic RAM (DRAM) chip manufactured by Intel. The '-25' indicates an access time of 250ns. This memory chip was utilized in older computer systems and other electronic devices requiring volatile data storage. Similar to other DRAM chips, it necessitates periodic refreshing to retain data.

Applications

• Early personal computers
• Memory expansion boards
• Graphics cards
• Industrial controllers
• Test and measurement equipment

Features

• 64K x 1-bit Organization: Provides 65,536 storage locations, each capable of holding one bit of data.
• 250ns Access Time: Offers a data access time of 250 nanoseconds.
• Single +5V Power Supply: Operates using a single 5-volt power supply.
• TTL Compatible Inputs/Outputs: Designed to be compatible with standard TTL logic levels.
• Multiplexed Address Inputs: Utilizes multiplexed address inputs to reduce pin count.
• Refresh Cycle Required: Requires periodic refresh cycles to maintain stored data.

Benefits

• Volatile Memory Storage: Provides temporary storage for data and program instructions.
• Industry Standard: Compatible with industry-standard DRAM interfaces.
• Suitable for Legacy Systems: Can be used to repair or upgrade older computer systems.

Additional Details

The D2186-25 is typically packaged in a 16-pin DIP (Dual In-Line Package). It requires a refresh cycle, usually every few milliseconds, to prevent data loss. Refer to the Intel datasheet for complete timing diagrams, electrical specifications, and refresh procedures.