The Maxim Integrated DS1554-70 is a full-function, year 2000-compliant real-time clock/calendar (RTC) and 512k NV SRAM. This high-performance, binary-coded decimal (BCD) clock/calendar is specifically designed to provide a versatile and reliable solution for embedded systems that require durable and persistent memory along with an accurate timekeeping mechanism.

Encased in a 34-pin PowerCap Module (PCM), the DS1554-70 is equipped with a built-in lithium energy source and a quartz crystal, which ensures that the clock/calendar maintains accurate timekeeping and that the RAM retains data in the absence of an external power supply. This nonvolatile RAM with RTC is a perfect fit for applications that cannot afford to lose data during power failures or require time-stamping data collected from various sensors or input devices.

The device features a wide voltage range of 2.7V to 3.6V, making it suitable for battery-backed applications. The DS1554-70 provides a simple and efficient interface for microprocessors via an 8-bit parallel interface. It also includes an interrupt output which can be programmed to generate alarms on a periodic or one-time basis, providing additional utility for time-sensitive tasks.

Key features of the DS1554-70 include:

• 512K x 8 Nonvolatile SRAM
• Integrated Real Time Clock/Calendar
• Automatic Leap Year Compensation Valid Up to 2100
• Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
• Full Clock Function Includes Two Time-of-Day Alarms
• Watch Function is Transparent to RAM Operation
• 8-bit Parallel Interface
• Programmable Interrupt for System Utility

The DS1554-70 is ideal for applications in telecommunications, networking, industrial systems, and any other systems that require accurate timekeeping alongside nonvolatile data storage. With its robust feature set, the DS1554-70 provides a compact, reliable, and energy-efficient solution for time and data management in critical applications.