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DS1338Z-33

DS1338Z-33 Description

The DS1338Z-33 is a real-time clock/calendar (RTC) IC from Analog Devices Inc./Maxim Integrated, designed for precision timekeeping in embedded systems. Operating within a 3V to 5.5V supply range, it integrates a 56B NVSRAM for non-volatile data storage, ensuring data retention during power loss. The device supports I²C communication, making it compatible with a wide range of microcontrollers. Its 12/24-hour time format (HH:MM:SS) and leap year compensation enhance accuracy for long-term applications. The square wave output provides additional timing flexibility, while its low current consumption (125µA–200µA) makes it suitable for battery-backed systems.

DS1338Z-33 Features

• Clock/Calendar Functionality: Tracks seconds, minutes, hours, day, date, month, and year with leap year correction.
• Low Power Consumption: 200µA max timekeeping current at 3.63V–5.5V, extending battery life.
• NVSRAM Integration: 56B of non-volatile memory for critical data storage.
• Wide Voltage Range: Operates from 3V to 5.5V (main supply) and 1.3V to 3.7V (battery backup).
• Square Wave Output: Configurable frequency output for system synchronization.
• I²C Interface: Simplifies integration with host controllers.
• Surface-Mount Package: 8-SOIC for compact PCB designs.

DS1338Z-33 Applications

• Industrial Automation: Time-stamping for data logging and event tracking.
• Medical Devices: Accurate timing for diagnostic equipment and patient monitoring.
• Consumer Electronics: Clocks in smart home devices, appliances, and wearables.
• Battery-Powered Systems: IoT nodes, meters, and backup clocks due to low power draw.
• Automotive Systems: Event recorders and infotainment systems requiring reliable timekeeping.

Conclusion of DS1338Z-33

The DS1338Z-33 is a highly reliable RTC with NVSRAM integration, low power operation, and robust timing accuracy, making it ideal for applications demanding precision and data retention. Its I²C interface and compact form factor ensure seamless integration into modern electronic designs. While marked as obsolete, it remains a viable choice for legacy systems or designs prioritizing proven performance. For new designs, consider checking for recommended replacements from Analog Devices/Maxim Integrated.