Introducing the DS17887-5 Real-Time Clock from Maxim Integrated

The DS17887-5 is a full-featured, Y2K-compliant real-time clock/calendar (RTC) from Maxim Integrated that integrates a binary-coded decimal (BCD) time/date representation with a programmable alarm, interrupt functions, and a power-on reset. This RTC is designed to maintain accurate timekeeping when system power is off, making it an essential component for a wide range of applications, including embedded systems, servers, personal computers, and industrial controllers.

Key Features

• Y2K Compliance: The DS17887-5 addresses the year 2000 compliance issue with its century byte, ensuring that date and time calculations extend well into the future.
• Integrated Battery Backup: With its built-in lithium battery, the DS17887-5 maintains timekeeping and data retention without external power, providing reliability and peace of mind for critical applications.
• Programmable Alarm: The device features a programmable alarm that can be set for a specific time of day, date, month, or even day of the week, enabling scheduled tasks and reminders.
• Power-On Reset: The power-on reset function ensures that the RTC starts in a known state, which is crucial for maintaining system integrity during power fluctuations or outages.
• Multiple Interrupts: The DS17887-5 offers multiple interrupt functions, including periodic interrupts and end-of-clock update interrupts, allowing for versatile system integration.

Technical Specifications

The DS17887-5 operates within a voltage range of 4.5V to 5.5V and is fully accessible in the same address space as the IBM AT-compatible nonvolatile CMOS RAM. It is designed to be directly connected to a microprocessor bus, and its address and data are multiplexed on a byte-wide interface to optimize the microprocessor interface.

For ease of integration, the DS17887-5 is available in a 24-pin DIP (Dual In-line Package) or SO (Small Outline) package, ensuring compatibility with a wide range of PCB layouts and designs. Its clock accuracy is maintained across a temperature range of 0°C to +70°C, making it suitable for many different environments.

With its robust feature set and reliable performance, the DS17887-5 is the ideal choice for designers who need a dependable timekeeping solution that is easy to integrate and offers long-term stability.