The DS1643-100+ is a high-performance, nonvolatile timekeeping RAM module from Maxim Integrated that integrates a full-function, battery-backed real-time clock and 32k x 8 nonvolatile static RAM. Designed to be a complete memory and timekeeping solution, this device offers a unique combination of volatile and nonvolatile memory, making it an ideal choice for applications that require data and time to be preserved across power cycles.

Key Features

• Integrated Power Source: The DS1643-100+ comes with a built-in, long-life lithium battery that ensures data and clock functionality are maintained for over 10 years in the absence of external power.
• Real-Time Clock (RTC): The device features a full-function RTC that provides seconds, minutes, hours, day, date, month, and year information, with automatic leap year compensation valid up to 2100.
• Nonvolatile SRAM: 32k x 8 bits of nonvolatile static RAM allow for quick access to data, with the added benefit of data retention without power.
• Automatic Write-Protection: The module includes write protection features that automatically engage during power-down or power-up events, ensuring data integrity during vulnerable transition periods.

Applications

The DS1643-100+ is versatile and can be utilized in a wide range of applications, including:

• Utility meters
• Security systems
• Industrial time clocks
• POS terminals
• Network servers
• Medical equipment
• Embedded systems

Technical Specifications

• Package: EDIP-28
• Voltage: 4.5V to 5.5V
• Operating Temperature: 0°C to +70°C
• Timing Accuracy: ±1 minute/month at 25°C

With its robust feature set and reliable performance, the Maxim Integrated DS1643-100+ is a comprehensive solution for systems requiring nonvolatile memory backup and precise timekeeping capabilities.