Maxim Integrated DS1220AD-100+ Nonvolatile SRAM

The Maxim Integrated DS1220AD-100+ is a highly reliable, 16k Nonvolatile SRAM (NV SRAM) designed to provide a robust memory solution with an inherent fail-safe feature. This 2k x 8 nonvolatile static RAM integrates a full-featured SRAM with a nonvolatile element in each memory cell. The device is engineered to protect critical data against system failures, ensuring data retention without the need for an external battery.

With its access time of 100 ns, the DS1220AD-100+ offers swift read and write operations, making it suitable for a wide range of high-speed applications that require data preservation upon power loss. The nonvolatile functionality is achieved through the use of an internal lithium energy source and control circuitry which constantly monitors V_CC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write-protection is unconditionally enabled to prevent data corruption.

This memory module boasts a robust design with a high level of integration, which simplifies the system design and enhances reliability. The DS1220AD-100+ has a wide operating temperature range, making it suitable for industrial applications. Its package is a standard 24-pin 600 mil DIP, which is compatible with most existing RAM designs and allows for easy upgrades to existing systems without significant redesign.

Key features of the DS1220AD-100+ include:

• 10-year minimum data retention in the absence of external power
• Data is automatically protected during power loss
• Directly replaces volatile static RAM or EEPROM
• Unlimited write cycles
• Low-power CMOS
• Read and write access times of 100 ns
• JEDEC standard 24-pin DIP package

The DS1220AD-100+ from Maxim Integrated is an ideal memory solution for applications in telecommunications, industrial control systems, and other critical systems where data integrity and retention are of paramount importance. Its nonvolatility and ease of integration make it a valuable component for designers looking to enhance the reliability and performance of their systems.