The DS1221S/T&R from Maxim Integrated is a specialized nonvolatile (NV) controller chip designed to maintain the integrity of SRAM data during power failure. This innovative product ensures that data is safely transferred to and from an external nonvolatile memory, typically EEPROM, when an unforeseen power loss occurs.

Key Features

• Automatic Battery Backup: The DS1221S/T&R automatically switches to the backup battery when a power failure is detected, ensuring continuous operation and data preservation.
• Power-Fail Write Protection: This feature prevents data corruption by inhibiting write operations during a power failure.
• Low-Power CMOS: The device is designed with low-power CMOS technology, which minimizes power consumption and extends battery life.
• Chip Enable Gating: The controller provides chip enable gating to prevent erroneous write operations.
• Compact Packaging: Offered in a space-saving surface-mount package, it is ideal for applications with limited board space.

Applications

The DS1221S/T&R is suitable for a wide range of applications that require data integrity during power loss. These include:

• RAID systems
• Industrial controllers
• Medical monitoring devices
• POS terminals
• Telecommunications equipment

Technical Specifications

The device operates over a wide voltage range and features a precision voltage monitor that ensures reliable operation. It is engineered to work with 5V-powered SRAMs and is available in tape and reel (T&R) format for ease of manufacturing and assembly processes.

Ordering Information

The DS1221S/T&R is available for order from Maxim Integrated. For detailed specifications, pricing, and ordering information, please visit the Maxim Integrated website or contact an authorized distributor.