The DS1235Y is a 32k Nonvolatile SRAM manufactured by Dallas Semiconductor (now Maxim Integrated). It combines static RAM (SRAM) with nonvolatile storage, offering the speed of SRAM with data retention capabilities even when power is lost. The internal lithium battery ensures data remains intact, making it ideal for applications where preserving data during power failures is crucial.

Applications

• Industrial Control Systems: Storage of critical parameters and program settings in PLCs and other industrial automation equipment.
• Data Logging: Preserves data records in scientific instruments, environmental monitoring systems, and other data logging applications.
• Medical Devices: Stores patient data, calibration settings, and other critical information in medical equipment.
• Point-of-Sale (POS) Systems: Protects sales data and transaction logs in retail and hospitality environments.
• Networking Equipment: Stores configuration settings and routing tables in routers, switches, and other networking devices.

Features

• Nonvolatile SRAM: Combines the speed of SRAM with nonvolatile storage, ensuring data retention without external power.
• Built-in Lithium Battery: Provides power for data retention during power outages.
• 32k Memory Capacity: Offers a storage capacity of 32 kilobytes.
• Unlimited Write Cycles: Supports an unlimited number of write cycles without degradation.
• Automatic Power-Fail Detection and Switchover: Automatically switches to battery backup power when power fails, ensuring seamless data retention.

Benefits

• Data Integrity: Ensures that critical data is preserved even during power failures, preventing data loss and corruption.
• Improved System Reliability: Enhances system reliability by providing a backup memory solution that retains data without external power.
• Simplified System Design: Simplifies system design by integrating nonvolatile storage into a single device, reducing the need for external EEPROM or flash memory.
• Reduced Maintenance Costs: Reduces maintenance costs by eliminating the need for frequent battery replacements.
• Fast Access Time: Offers fast read and write access times, allowing for high-speed data processing and storage.

Additional Details

The DS1235Y typically operates from a 5V power supply and provides a standard SRAM interface for easy integration into existing systems. It is designed to be drop-in replacement for standard SRAM devices, allowing for seamless upgrades to nonvolatile memory without requiring significant hardware changes.

The internal lithium battery has a typical lifespan of 10 years or more, providing long-term data retention. When the primary power supply fails, the device automatically switches to the battery, preserving the data stored in the SRAM. Refer to the datasheet for specific details on the battery capacity and expected lifespan. As Dallas Semiconductor is now part of Maxim Integrated, the official datasheet can be found on the Maxim Integrated website.