The DS17887-3 from Maxim Integrated is a high-performance, integrated circuit that combines a full-function real-time clock (RTC) with an embedded microcontroller supervisor and a nonvolatile SRAM controller. This versatile IC is designed to provide a reliable timekeeping solution for a wide range of applications, including embedded systems, industrial controls, and telecommunications equipment.

Key Features

• Real-Time Clock: The DS17887-3 offers a precise RTC with a built-in crystal oscillator for accurate timekeeping. It includes features such as a programmable alarm, calendar, and month, date, day, and time functions.
• Microcontroller Supervisor: The device includes power-fail write protection for nonvolatile memory, ensuring data integrity during unexpected power loss. It also provides a watchdog timer to monitor the operation of the microcontroller and a reset function to maintain system reliability.
• Memory: The DS17887-3 integrates battery-backed nonvolatile SRAM, which retains data without external power, making it ideal for critical data storage.
• Communication: It supports a simple multiplexed bus interface that allows for easy integration with most microprocessors, minimizing the need for additional components and simplifying the design process.
• Power Management: The IC features a programmable VCC sense voltage that enables power-fail warning, battery switch-over, and chip enable gating, providing efficient power management and extending battery life.

Applications

The DS17887-3 is suitable for a variety of applications where accurate timekeeping and data integrity are paramount. It is commonly used in:

• Networking equipment such as routers and switches
• Industrial control systems
• Data loggers and telemetry systems
• POS terminals
• Medical devices
• Security systems

With its robust feature set and Maxim Integrated's reputation for quality, the DS17887-3 is an excellent choice for designers looking to incorporate a reliable timekeeping and memory solution into their systems.