The DS1647-120+ is a high-performance, full-function Timekeeping RAM integrated by Maxim Integrated. This innovative product combines a full-featured real-time clock and 64kB NV SRAM into one package, designed to provide a reliable and durable timekeeping solution for a wide range of applications. It is especially suitable for systems that require battery-backed non-volatile RAM and an accurate time reference.

Key Features

• Real-Time Clock (RTC): The device includes a precision RTC that maintains seconds, minutes, hours, day, date, month, and year information, with automatic leap year compensation valid until 2100.
• Non-Volatile SRAM: 64kB of static RAM with a built-in lithium energy source and control circuitry to ensure data integrity during power loss.
• High-Speed Data Transfer: Capable of supporting 120ns access time, the DS1647-120+ ensures rapid data retrieval and storage, enhancing overall system performance.
• Battery Service Life: Features a long-life battery that provides reliable data retention and clock functionality for over 10 years in the absence of power.
• Integrated Crystal: The inclusion of a built-in crystal oscillator enhances the accuracy of the timekeeping function, eliminating the need for external timing components.
• Programmable Alarm: A programmable interrupt/alarm function allows for the scheduling of time-specific tasks or the wake-up of the host system from a low-power mode.

Applications

With its combination of non-volatile memory and a precise timekeeping mechanism, the DS1647-120+ is ideal for applications such as:

• Data logging and storage systems
• Industrial controllers
• Embedded systems
• Utility meters
• POS terminals
• Medical devices
• Security systems

Technical Specifications

The DS1647-120+ operates over a wide temperature range and is available in a 32-pin EDIP or LCC package. It is fully compatible with JEDEC standards for non-volatile memory, ensuring ease of integration into existing systems.