The DS1220Y-100 is a Nonvolatile Static RAM (NVSRAM) manufactured by Dallas Semiconductor (now Maxim Integrated). It combines the fast access of static RAM (SRAM) with nonvolatile storage, ensuring data retention even when power is lost. This makes it suitable for applications requiring reliable memory with backup capabilities.

Applications

• Data Logging: Stores critical data in industrial control systems, medical devices, and other applications where data loss is unacceptable.
• Configuration Storage: Stores configuration settings for electronic devices, allowing them to retain their settings after power cycles.
• Metering: Stores meter readings in utility meters, ensuring accurate billing even during power outages.
• Gaming Machines: Stores game scores and settings in arcade machines and gambling devices.
• Robotics: Saves robot parameters to NVRAM.

Features

• Nonvolatile Storage: Retains data even when power is removed.
• Fast Access Time: Offers fast read and write access times, comparable to standard SRAM.
• Unlimited Write Cycles: Supports an unlimited number of write cycles.
• Automatic Power-Fail Detection and Switchover: Automatically switches to battery backup power when power fails.
• Low Power Consumption: Designed for low power operation, extending battery life.

Benefits

• Data Integrity: Ensures data is preserved even during power outages, preventing data loss and corruption.
• Improved System Reliability: Enhances system reliability by providing a backup memory solution.
• Simplified System Design: Simplifies system design by integrating nonvolatile storage into a single device.
• Reduced Maintenance Costs: Reduces maintenance costs by eliminating the need for frequent battery replacements.
• Enhanced Security: Provides a secure storage solution for sensitive data.

Additional Details

The DS1220Y-100 has an access time of 100ns. It includes a built-in lithium battery to provide power during power outages. The battery typically has a lifespan of 10 years or more. When the primary power supply fails, the device automatically switches to the battery, preserving the data stored in the SRAM. The data is retained as long as the battery has sufficient charge.

It is important to note that the battery is typically soldered onto the device and is not user-replaceable. Care must be taken to avoid overheating the device during soldering, as this can damage the battery and reduce its lifespan. Always refer to the manufacturer's datasheet for the recommended soldering procedures and other important information. As Dallas Semiconductor is now part of Maxim Integrated, the official datasheet can be found on the Maxim Integrated website.